U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Publication year rev 8003-1997 Remove constraint Publication year rev: 8003-1997 Subject term seedlings Remove constraint Subject term: seedlings
Start Over

Search

385  Search Results

« Previous | 1 - 100 of 385 |
Number of results to display per page

Search Results

1. 1,8-Cineole inhibits root growth and DNA synthesis in the root apical meristem ofBrassica campestris L.

Author:
Ritsuko Koitabashi; Takeshi Suzuki; Tamotsu Kawazu; Atsushi Sakai; Haruko Kuroiwa; Tsuneyoshi Kuroiwa
Source:
Journal of plant research 1997 v.110 no.1 pp. 1-6
ISSN:
0918-9440
Subject:
DNA; allelopathy; antibodies; apical meristems; cell nucleus; cineole; fluorescence microscopy; germination; growth retardation; hypocotyls; mitosis; organelles; root growth; roots; seedlings; thymidine
Abstract:
... 1,8-cineole is a volatile growth inhibitor produced bySalvia species. We examined the effect of this allelopathic compound on the growth of other plants usingBrassica campestris as the test plant. Cineole inhibited germination and growth ofB. campestris in a dosedependent manner. WhenB. campestris was grown for 5 days with various concentrations of cineole, the length of the roots was found to be ...
DOI:
10.1007/BF02506836

2. A 146 bp fragment of the tobacco Lhcb1*2 promoter confers very-low-fluence, low-fluence and high-irradiance responses of phytochrome to a minimal CaMV 35S promoter

Author:
Pablo D. Cerdán; Roberto J. Staneloni; Jorge J. Casal; Rodolfo A. Sánchez
Source:
Plant molecular biology 1997 v.33 no.2 pp. 245-255
ISSN:
0167-4412
Subject:
Cauliflower mosaic virus; Nicotiana tabacum; beta-glucuronidase; far-red light; gene expression; genes; light intensity; phytochrome; promoter regions; red light; seedlings; tobacco; transgenic plants
Abstract:
... The occurrence of very-low-fluence responses (VLFR), low-fluence responses (LFR) and high-irradiance responses (HIR) of phytochrome was investigated for the expression of the gene of β-glucuronidase (gusA) under the control of the tobacco Lhcb1*2 promoter, in etiolated transgenic tobacco seedlings. The activity of β-glucuronidase (GUS) showed biphasic responses to the calculated proportion of Pf ...
DOI:
10.1023/A:1005784407282

3. 8'-Methylene abscisic acid: an effective and persistent analog of abscisic acid

Author:
Abrams, S.R.; Rose, P.A.; Cutler, A.J.; Balsevich, J.J.; Lei, B.; Walker-Simmons, M.K.
Source:
Plant physiology 1997 v.114 no.1 pp. 89-97
ISSN:
0032-0889
Subject:
seed germination; Zea mays; chemical reactions; seedlings; cotyledons; biochemical pathways; carbon; transpiration; Triticum aestivum; growth retardation; gene expression; binding sites; abscisic acid; Lepidium sativum; synthesis; cell suspension culture
Abstract:
... We report here the synthesis and biological activity of a new persistent abscisic acid (ABA) analog, 8'-methylene ABA. This ABA analog has one additional carbon atom attached through a double bond to the 8'-carbon of the ABA molecule. (+)-8'-Methylene ABA is more active than the natural hormone (+)-ABA in inhibiting germination of cress seed and excised wheat embryos, in reducing growth of suspens ...

4. The A and B forms of plastid DNA-dependent RNA polymerase from mustard (Sinapis alba L.) transcribe the same genes in a different developmental context

Author:
Pfannschmidt, T.; Link, G.
Source:
MGG 1997 v.257 no.1 pp. 35-44
ISSN:
0026-8925
Subject:
Sinapis alba; DNA-directed RNA polymerase; chloroplast DNA; rifampicin; genes; ribosomal DNA; gene expression; light; etioplasts; seedlings; messenger RNA; genomics; transcription (genetics); promoter regions
DOI:
10.1007/s004380050621
PubMed:
9439567

5. AC Langille birdsfoot trefoil

Author:
Papadopoulos, Y.A.; Choo, T.M.; Christie, B.R.; Thomas, W.G.; McKenzie, D.B.; Belanger, G.; Sutherland, K.; McRae, K.B.; Fillmore, S.A.E.
Source:
Canadian journal of plant science 1997 v.77 no.4 pp. 653-654
ISSN:
0008-4220
Subject:
winter hardiness; vigor; seedlings; high-yielding varieties; Lotus corniculatus; Canada
DOI:
10.4141/P96-097

6. Abscisic acid inhibits germination of mature Arabidopsis seeds by limiting the availability of energy and nutrients

Author:
Garciarrubio, A.; Legaria, J.P.; Covarrubias, A.A.
Source:
Planta 1997 v.203 no.2 pp. 182-187
ISSN:
0032-0935
Subject:
Arabidopsis thaliana; seed germination; ammonia; nitrogen metabolism; seeds; glucose; seedlings; sucrose; peptones; amino acids; maltose; abscisic acid; metabolites
Abstract:
... The addition of abscisic acid (ABA) to mature non-dormant seeds inhibits their germination. This effect of ABA might be related to its natural function as an endogenous inhibitor of precocious germination during seed formation. In this work, we studied how ABA affects the germination of mature seeds and the growth of nascent seedlings of Arabidopsis thaliana (L.) Heynh. Our findings were as follow ...
DOI:
10.1007/s004250050180
PubMed:
9362564

7. Absolute quantification of five phytochrome transcripts in seedlings and mature plants of tomato (Solanum lycopersicum L.)

Author:
Hauser, B.A.; Pratt, L.H.; Cordonnier-Pratt, M.M.
Source:
Planta 1997 v.201 no.3 pp. 379-387
ISSN:
0032-0935
Subject:
messenger RNA; buds; hypocotyls; phenotype; seedlings; shoots; DNA probes; cotyledons; flowers; gene expression; transcription (genetics); multigene family; ripening; phytochrome; roots; leaves; Solanum lycopersicum var. lycopersicum
Abstract:
... Described here are the first quantitative measurements of absolute amounts of mRNAs transcribed from individual members of a phytochrome gene (PHY) family. The abundances of PHY mRNAs were determined for dry seed and for selected organs of greenhouse-grown tomato (Solanum lycopersicum L.) seedlings and mature plants. With a PhosphorImager, absolute amounts of PHYA, PHYB1, PHYB2, PHYE and PHYF tran ...
DOI:
10.1007/s004250050080
PubMed:
9129340

8. Acclimation of shade-developed leaves on saplings exposed to late-season canopy gaps

Author:
Naidu, S.L.; DeLucia, E.H.
Source:
Tree physiology 1997 v.17 no.6 pp. 367-376
ISSN:
0829-318X
Subject:
canopy; nitrogen content; Quercus rubra; seedlings; gas exchange; fluorescence; net assimilation rate; acclimation; photoinhibition; light harvesting complex; shade; Acer saccharum; chlorophyll; oxygen; leaves; measurement
Abstract:
... We hypothesized that photoinhibition of shade-developed leaves of deciduous hardwood saplings would limit their ability to acclimate photosynthetically to increased irradiance, and we predicted that shade-tolerant sugar maple (Acer saccharum Marsh.) would be more susceptible to photoinhibition than intermediately shade-tolerant red oak (Quercus rubra L.). After four weeks in a canopy gap, photosyn ...
DOI:
10.1093/treephys/17.6.367

9. Accumulation of a glycoprotein that is homologous to a seed storage protein in mung bean hypocotyls at the late stage of tissue elongation

Author:
Odaira, M.; Yoshida, S.; Maeshima, M.
Source:
Plant & cell physiology 1997 v.38 no.3 pp. 290-296
ISSN:
0032-0781
Subject:
protein synthesis; cell growth; hypocotyls; seedlings; Vigna radiata; amino acid sequences; epicotyls; protein content; glycoproteins
Abstract:
... Physiological changes were examined in the amount of a 50-kDa glycoprotein (gp50) that was recovered in a nuclear fraction from hypocotyls of mung bean (Vigna radiata) seedlings. Immunoblot analysis indicated that the glycoprotein was present in hypocotyls and epicotyls from 4- and 5-day-old seedlings but not in hypocotyls from 2-day-old seedlings. The glycoprotein was not detected in leaves or ro ...
DOI:
10.1093/oxfordjournals.pcp.a029165
PubMed:
9150602

10. Acid rain and ozone effects on gas exchange of Pinus ponderosa: a comparison between trees and seedlings

Author:
Momen, B.; Anderson, P.D.; Helms, J.A.; Houpis, J.L.J.
Source:
International journal of plant sciences 1997 v.158 no.5 pp. 617-621
ISSN:
1058-5893
Subject:
net assimilation rate; Pinus ponderosa; acid deposition; ozone; gas exchange; tree age; seedlings; carbon dioxide; photosynthesis; stomatal conductance; water use efficiency; branches; pH; leaves; seasonal variation; genotype; California
DOI:
10.1086/297475

11. Acidic phosphoprotein complex of the 60S ribosomal subunit of maize seedling roots. Components and changes in response to flooding

Author:
Bailey-Serres, J.; Vangala, S.; Szick, K.; Lee, C.H.K.
Source:
Plant physiology 1997 v.114 no.4 pp. 1293-1305
ISSN:
0032-0889
Subject:
Zea mays; protein synthesis; messenger RNA; complementary DNA; phosphoproteins; seedlings; stress response; Saccharomyces cerevisiae; water stress; ribosomes; amino acid sequences; genes; nucleotide sequences; phosphotransferases (kinases); phosphorylation; enzyme activity; roots; protein composition
Abstract:
... We determined that ribosomes of seedling roots of maize (Zea mays L.) contain the acidic phosphoproteins (P-proteins) known to form a flexible lateral stalk structure of the 60S subunit of eukaryotic ribosomes. The P-protein stalk, composed of P0, P1, and P2, interacts with elongation factors, mRNA, and tRNA during translation. Acidic proteins of 13 to 15.5 kD were released as a complex from ribos ...
PubMed:
9276949
PubMed Central:
PMC158422

12. Age determination of Acacia tortilis (Forsk.) Hayne from northern Kenya

Author:
MARTIN, DAVID; MOSS, JONATHAN
Source:
African journal of ecology 1997 v.35 no.3 pp. 266-277
ISSN:
0141-6707
Subject:
Acacia tortilis; age determination; browsing; cambium; ecosystems; growth rings; regression analysis; seedlings; stems; Kenya
Abstract:
... Age determination on the basis of ring count holds great potential for the study of dry woodland ecosystem dynamics. Discs from stems of Acacia tortilis from Marsabit District, northern Kenya, were collected for dendrochronological analysis. Problems in the identification of growth rings are summarized. Regression analysis is used to develop age-ring count and ring count-size relationships. The ti ...
DOI:
10.1111/j.1365-2028.1997.067-89067.x

13. Airborne transmission of tomato mosaic Tobamovirus and its occurrence in red spruce in the northeastern United States

Author:
Fillhart, R.C.; Bachand, G.D.; Castello, J.D.
Source:
Canadian journal of forest research 1997 v.27 no.8 pp. 1176-1181
ISSN:
0045-5067
Subject:
Picea rubens; Tomato mosaic virus; geographical distribution; seedlings; altitude; roots; disease prevalence; seasonal variation; sampling; enzyme-linked immunosorbent assay; New York; Vermont; New Hampshire; Maine
Abstract:
... To test the hypothesis that tomato mosaic Tobamovirus (ToMV) is transmitted by an airborne mechanism, virus-free red spruce (Picea rubens Sarg.) seedlings were planted in four raised, plywood boxes lined with plastic and filled with a Promix-sand (3:1, v/v) mixture. In July 1993, two boxes were placed at 1015 m (site 1) and two at 960 m (site 2) elevation on Whiteface Mountain, N.Y. ToMV was detec ...
DOI:
10.1139/x97-035

14. Alteration of levels of cyclic nucleotides in response to anaerobiosis in rice seedlings

Author:
Reggiani, R.
Source:
Plant & cell physiology 1997 v.38 no.6 pp. 740-742
ISSN:
0032-0781
Subject:
Oryza sativa; seedlings; anaerobic conditions; roots; coleoptiles; cyclic GMP; cyclic AMP; quantitative analysis; chemical constituents of plants; stress response
Abstract:
... The imposition of anaerobic conditions resulted in a rapid (2 min) and transient increase in cGMP content in root and coleoptile of rice seedlings. The level of cAMP was strongly decreased by anoxia. These data are discussed in relation to the anaerobic response. ...
DOI:
10.1093/oxfordjournals.pcp.a029228

15. Alternative conifer release treatments affect leaf area index of competing vegetation and available light for seedling growth

Author:
Reynolds, P.E.; Bell, F.W.; Simpson, J.A.; Gordon, A.M.; Lautenschlager, R.A.; Gresch, D.A.; Buckley, D.A.
Source:
Forestry chronicle 1997 v.73 no.1 pp. 83-89
ISSN:
0015-7546
Subject:
triclopyr; seedling growth; pioneer species; boreal forests; Picea mariana; seedlings; leaf area index; plant characteristics; light intensity; height; Picea glauca; glyphosate; plant competition; Populus tremuloides; forest plantations; understory; Ontario
DOI:
10.5558/tfc73083-1

16. Antagonistic but complementary actions of phytochromes A and B allow optimum seedling de-etiolation

Author:
Smith, H.; Xu, Y.; Quail, P.H.
Source:
Plant physiology 1997 v.114 no.2 pp. 637-641
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; seedlings; hypocotyls; phytochrome; dose response; red light; far-red light; genetic variation; genotype; etiolation
Abstract:
... Using dichromatic radiation, we show that the actions of phytochromes A and B (phyA and phyB) in Arabidopsis thaliana are antagonistic in mediating red and far-red radiation effects on seedling de-etiolation and yet act in a complementary manner to regulate de-etiolation, irrespective of spectral composition. At low phytochrome photoequilibria inhibition of hypocotyl extension was strong, because ...

17. Apoplastic alpha-amylase in pea is enhanced by heat stress

Author:
Commuri, P.D.; Duke, S.H.
Source:
Plant & cell physiology 1997 v.38 no.5 pp. 625-630
ISSN:
0032-0781
Subject:
Pisum sativum; seedlings; stems; heat stress; alpha-amylase; malate dehydrogenase; phosphoenolpyruvate carboxylase; enzyme activity; measurement; temperature; dose response; stress response
Abstract:
... The apoplastic alpha-amylase (EC 3.2.1.1) in pea (Pisum sativum L. cv. Laxton's Progress No.9) seedlings was enhanced by a 4- to 6-fold with heat stress. Increased levels of the enzyme persisted for 48 h at least after the stress and subsequent heat treatments enhanced the activity further. These results indicate that the function of apoplastic alpha-amylase in vegetative tissues may be related to ...
DOI:
10.1093/oxfordjournals.pcp.a029213

18. An Arabidopsis mutant showing reduced feedback inhibition of photosynthesis

Author:
Oosten, J.J.M. van.; Gerbaud, A.; Huijser, C.; Dijkwel, P.P.; Chua, N.H.; Smeekens, S.C.M.
Source:
plant journal 1997 v.12 no.5 pp. 1011-1020
ISSN:
0960-7412
Subject:
Arabidopsis thaliana; ribulose-bisphosphate carboxylase; carbon dioxide; glucose; sucrose; seedlings; luciferase; linkage groups; mutants; reporter genes; photosynthesis; enzyme activity; culture media; promoter regions
Abstract:
... Many plant genes are responsive to sugars but the mechanisms used by plants to sense sugars are unknown. A genetic approach has been used in Arabidopsis to identify genes involved in perception and transduction of sugar signals. For this purpose, an in vivo reporter system was established consisting of the light- and sugar-regulated plastocyanin promoter, fused to the luciferase coding sequence (P ...
DOI:
10.1046/j.1365-313X.1997.12051011.x
PubMed:
9418043

19. Artificial defoliation, decapitation of the terminal bud, and removal of the apical tip of the shoot in sessile oak seedlings and consequences on subsequent growth

Author:
Chaar, H.; Colin, F.; Leborgne, G.
Source:
Canadian journal of forest research = 1997 v.27 no.10 pp. 1614-1621
ISSN:
0045-5067
Subject:
apical meristems; Quercus petraea; seedlings; plant characteristics; height; mechanical damage; defoliation; branches; leaves
Abstract:
... To simulate the damage caused by herbivores and fungi and study their effects on 1-year-old nursery-grown sessile oak (Quercus petraea (Matt.) Liebl.) seedlings, (1) the portion of stem produced during the first growth flush, referred to as the growth unit (GU), was artificially defoliated, decapitated, or both or (2) the apical part of the GU was removed in the period of apparent rest. In compari ...
DOI:
10.1139/x97-128

20. Assessing progenies of potato for resistance to skin spot (Polyscytalum pustulans) in the glasshouse

Author:
Wastie, R.L.; Stewart, H.E.; Bradshaw, J.E.; Lees, A.K.
Source:
Potato research 1997 v.40 no.4 pp. 383-389
ISSN:
0014-3065
Subject:
seedlings; greenhouse production; Solanum tuberosum; crossing; tubers; agricultural programs and projects; disease resistance; progeny; heritability; early selection; Polyscytalum pustulans; selection criteria
DOI:
10.1007/BF02357997

21. Asymmetric, blue light-dependent phosphorylation of a 116-kilodalton plasma membrane protein can be correlated with the first- and second-positive phototropic curvature of oat coleoptiles

Author:
Salomon, M.; Zacherl, M.; Rudiger, W.
Source:
Plant physiology 1997 v.115 no.2 pp. 485-491
ISSN:
0032-0889
Subject:
Avena sativa; seedlings; coleoptiles; phototropism; blue light; plant proteins; phosphorylation; protein synthesis; quantitative analysis; plasma membrane; etiolation
Abstract:
... The possible correlation between blue light-dependent phosphorylation of a 116-kD protein and phototropic responses of etiolated oat (Avena sativa L.) seedlings was tested by a micromethodfor protein phosphorylation. Quantitation of the basipetal distribution of this protein showed that the in vitro 32P phosphorylation values declined exponentially from tip to node, with more than 50% of the total ...
PubMed:
11536817
PubMed Central:
PMC158506

22. Atmospheric CO2 enrichment increases growth and photosynthesis of Pinus taeda: a 4 year experiment in the field

Author:
Tissue, D.T.; Thomas, R.B.; Strain, B.R.
Source:
Plant, cell and environment 1997 v.20 no.9 pp. 1123-1134
ISSN:
0140-7791
Subject:
carbon dioxide; canopy; stomatal conductance; sugars; seedlings; nutrient availability; air temperature; leaf area; starch; carbon; seasonal variation; ecosystems; field experimentation; Pinus taeda; photosynthesis; light; dry matter partitioning; biomass; biogeochemical cycles
Abstract:
... Forest trees are major components of the terrestrial biome and their response to rising atmospheric CO2 plays a prominent role in the global carbon cycle. In this study, loblolly pine seedlings were planted in the field in recently disturbed soil of high fertility, and CO2 partial pressures were maintained at ambient CO2 (Amb) and elevated CO2 (Amb + 30 Pa) for 4 years. The objective of the study ...
DOI:
10.1046/j.1365-3040.1997.d01-140.x

23. Auxin regulation and spatial localization of an endo-1,4-beta-D-glucanase and a xyloglucan endotransglycosylase in expanding tomato hypocotyls

Author:
Catala, C.; Rose, J.K.C.; Bennett, A.B.
Source:
plant journal 1997 v.12 no.2 pp. 417-426
ISSN:
0960-7412
Subject:
auxins; spatial distribution; hypocotyls; beta-glucanase; glycosyltransferases; cell growth; xyloglucans; carbohydrate metabolism; messenger RNA; gene expression; cell walls; seedlings; cortex; histochemistry; antisense RNA; nucleotide sequences; amino acid sequences; structural genes; complementary DNA; cell wall components
Abstract:
... Xyloglucan, the primary hemicellulosic cell wall polysaccharide in dicotyledons, undergoes substantial modification during auxin-stimulated cell expansion. To identify candidates for mediating xyloglucan turnover, the expression and auxin regulation of tomato Cel7 and LeEXT, genes encoding an endo-1,4-beta-glucanase (EGase) and a xyloglucan endotransglycosylase (XET), respectively, were examined. ...
DOI:
10.1046/j.1365-313X.1997.12020417.x
PubMed:
9301092

24. BANYULS, a novel negative regulator of flavonoid biosynthesis in the Arabidopsis seed coat

Author:
Albert, S.; Delseny, M.; Devic, M.
Source:
plant journal 1997 v.11 no.2 pp. 289-299
ISSN:
0960-7412
Subject:
Arabidopsis thaliana; seed germination; testa; biosynthesis; phenotype; transgenic plants; seedlings; trichomes; mutation; root hairs; chromosome mapping; recessive genes; flavonoids; light; seed development
Abstract:
... A mutant of Arabidopsis that accumulates a high level of red pigments within the seed coat has been isolated from a population of T-DNA-transformed plants. Genetic analysis revealed that the mutation is recessive and affects maternal seed tissues only. Due to the color of the immature seeds, this mutation was named banyuls (ban). Pigments accumulated continuously from early seed development to the ...
DOI:
10.1046/j.1365-313X.1997.11020289.x
PubMed:
9076994

25. Benefits of cotton seed treatments for the control of seedling diseases in relation to inoculum densities of Pythium species and Rhizoctonia solani

Author:
Davis, R.M.; Nunez, J.J.; Subbarao, K.V.
Source:
Plant disease 1997 v.81 no.7 pp. 766-768
ISSN:
0191-2917
Subject:
electrical conductivity; soil temperature; seedlings; inoculum density; plant density; myclobutanil; particle size distribution; metalaxyl; damping off; Gossypium hirsutum; Thanatephorus cucumeris; seed dressings; Pythium; soil pH; soil organic matter; air temperature; plant establishment; disease control; pesticide mixtures; chemical control; California
Abstract:
... Twenty-five field trials conducted over a 3-year period in five San Joaquin Valley counties included the following treatments: nontreated cotton seed; seed treated with myclobutanil for the control of Rhizoctonia solani-induced damping-off; seed treated with metalaxyl for the control of Pythium-induced damping-off; and seed treated with a combination of the two fungicides. The following parameters ...
DOI:
10.1094/PDIS.1997.81.7.766

26. Biocontrol of seedborne Botrytis cinerea in chickpea with Gliocladium roseum

Author:
Burgess, D.R.; Bretag, T.; Keane, P.J.
Source:
Plant pathology 1997 v.46 no.3 pp. 298-305
ISSN:
0032-0862
Subject:
fungal antagonists; sporulation; Botrytis cinerea; seedlings; thiram; Clonostachys rosea; seed treatment; Rhizobium; nodulation; Cicer arietinum; application rate; culture filtrates; biological control
DOI:
10.1046/j.1365-3059.1997.d01-17.x

27. Biodiversity of endophytic bacteria which colonize red clover nodules, roots, stems and foliage and their influence on host growth

Author:
Sturz, A.V.; Christie, B.R.; Matheson, B.G.; Nowak, J.
Source:
Biology and fertility of soils 1997 v.25 no.1 pp. 13-19
ISSN:
0178-2762
Subject:
seedling growth; seedlings; Methylobacterium; Comamonas; Escherichia; Enterobacter; Agrobacterium; Pasteurella; roots; endophytes; stems; leaves; Xanthomonas; Bordetella; Phyllobacterium; Trifolium pratense; Rhizobium; biodiversity; Pseudomonas; Pantoea; Bacillus (bacteria); microorganisms; Curtobacterium
Abstract:
... The aim of this study was to identify the endophytic bacteria recovered from the foliage, tap roots and nodules of red clover plants (Trifolium pratense L.); and to assess the effects of the nodule bacteria, alone and in combination with Rhizobium spp., on the growth and development of red clover seedlings. Thirty-one bacteria species from 14 different genera were recovered from within the foliage ...
DOI:
10.1007/s003740050273

28. Blockage of brassinosteroid biosynthesis and sensitivity causes dwarfism in garden pea

Author:
Nomura, T.; Nakayama, M.; Reid, J.B.; Takeuchi, Y.; Yokota, T.
Source:
Plant physiology 1997 v.113 no.1 pp. 31-37
ISSN:
0032-0889
Subject:
height; plant characteristics; Pisum sativum; seedlings; shoots; brassinosteroids; biosynthesis; quantitative analysis; chemical reactions; biochemical pathways; internodes; dose response; length; dwarfing; mutants; genetic variation; chemical constituents of plants; genotype; width
Abstract:
... Endogenous brassinosteroids (BRs) in the dwarf mutants Ika and Ikb of garden pea (Pisum sativum L.) and comparable wild-type plants were quantified by gas chromatography-selected ion monitoring using deuterated internal standards. In young shoots of the Ikb mutant, the levels of brassinolide, castasterone, and 6-deoxocastasterone were 23-, 22-, and 9-fold lower, respectively, than those of wild-ty ...

29. Branch growth and biomass allocation in Abies amabilis saplings in contrasting light environments

Author:
King, D.A.
Source:
Tree physiology 1997 v.17 no.4 pp. 251-258
ISSN:
0829-318X
Subject:
height; plant characteristics; Abies amabilis; canopy; understory; seedlings; branches; length; measurement; allometry; biomass; growth models; mathematical models; Oregon
Abstract:
... Aboveground biomass allocation, and height and branch growth were studied in saplings of the shade-tolerant conifer, Abies amabilis Dougl. ex Forbes growing in large openings and in the understory of an old-growth forest in western Oregon. The presence of annual overwintering budscale scars was used to infer extension growth histories; annual growth rings in branches and stems were used in combina ...
DOI:
10.1093/treephys/17.4.251

30. Ca2+-activated anion channels and membrane depolarizations induced by blue light and cold in Arabidopsis seedlings

Author:
Lewis, B.D.; Karlin-Neumann, G.; Davis, R.W.; Spalding, E.P.
Source:
Plant physiology 1997 v.114 no.4 pp. 1327-1334
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; seedlings; hypocotyls; ion transport; cytoplasm; calcium; dose response; blue light; cold stress; luminescence; plasma membrane
Abstract:
... The activation of an anion channel in the plasma membrane of Arabidopsis thaliana hypocotyls by blue light (BL) is believed to be a signal-transducing event leading to growth inhibition. Here we report that the open probability of this particular anion channel depends on cytoplasmic Ca2+ ([Ca2+]cyt) within the concentration range of 1 to 10 micrometers, raising the possibility that BL activates th ...
PubMed:
9276950
PubMed Central:
PMC158425

31. Calcium signalling in Arabidopsis thaliana responding to drought and salinity

Author:
Knight, H.; Trewavas, A.J.; Knight, M.R.
Source:
plant journal 1997 v.12 no.5 pp. 1067-1078
ISSN:
0960-7412
Subject:
Arabidopsis thaliana; drought; salinity; water stress; cytosol; mannitol; seedlings; ion transport; chelating agents; lanthanum; gene expression; genes; ligases; verapamil; vacuoles; messenger RNA; inorganic ions; calcium; chemical constituents of plants; gadolinium; ethylene glycol tetraacetic acid
Abstract:
... Changes in cytosolic free calcium concentration ([Ca(2+)]cyt) in response to mannitol (drought) and salt treatments were detected in vivo in intact whole Arabidopsis seedlings. Transient elevations of [Ca(2+)]cyt to around 1.5 micromolars were observed, and these were substantially inhibited by pretreatment with the calcium-channel blocker lanthanum and to a lesser extent, the calcium-chelator EGT ...
DOI:
10.1046/j.1365-313X.1997.12051067.x
PubMed:
9418048

32. Can synthetic pesticides be replaced with biologically-based alternatives?--an industry perspective

Author:
Froyd, J.D.
Source:
Journal of industrial microbiology & biotechnology 1997 v.19 no.3 pp. 192-195
ISSN:
1367-5435
Subject:
Baculoviridae; Phytophthora infestans; Venturia inaequalis; agrochemicals; beneficial insects; biological control; biological control agents; biological development; business enterprises; disease control; downy mildew; foliar diseases; fungicides; grapes; horticultural crops; industry; insect control; insect pests; insecticides; mammals; market share; markets; powdery mildew; root rot; seedlings; viruses; weeds; wheat
Abstract:
... Agricultural chemical companies have invested in the discovery and development of biological pesticides to complement synthetic pesticides for the control of insects, diseases, and weeds on agronomic and horticultural crops. For plant disease control, companies envisage biological fungicides entering markets where they have the best chance of performing and which are most receptive to using biolog ...
DOI:
10.1038/sj.jim.2900421

33. Carbon isotopic composition, gas exchange, and growth of three populations of ponderosa pine differing in drought tolerance

Author:
Zhang, J.W.; Feng, Z.; Cregg, B.M.; Schumann, C.M.
Source:
Tree physiology 1997 v.17 no.7 pp. 461-466
ISSN:
0829-318X
Subject:
Pinus ponderosa; seedlings; water stress; drought; drought tolerance; carbon; isotopes; gas exchange; net assimilation rate; photosynthesis; stomata; leaf conductance; water use efficiency; xylem water potential; chemical constituents of plants; stress response; South Dakota; Montana
Abstract:
... Effects of water supply on gas exchange, carbon isotopic composition, and relative growth rate were compared among seedlings from three populations of ponderosa pine (Pinus ponderosa Dougl. ex Laws.) grown in a controlled environment chamber. The three populations were chosen to represent high, moderate and low drought tolerance. There was no indication that drought tolerance was related to high w ...
DOI:
10.1093/treephys/17.7.461

34. Carry-over effects of ozone on root growth and carbohydrate concentrations of ponderosa pine seedlings

Author:
Andersen, C.P.; Wilson, R.; Plocher, M.; Hogsett, W.E.
Source:
Tree physiology 1997 v.17 no.12 pp. 805-811
ISSN:
0829-318X
Subject:
Pinus ponderosa; seedlings; stems; conifer needles; ozone; phytotoxicity; roots; carbohydrates; quantitative analysis; biomass; chemical constituents of plants; stress response
Abstract:
... Ozone exposure decreases belowground carbon allocation and root growth of plants; however, the extent to which these effects persist and the cumulative impact of ozone stress on plant growth are poorly understood. To evaluate the potential for plant compensation, we followed the progression of ozone effects, with particular emphasis on the development of new roots. Ponderosa pine (Pinus ponderosa ...
DOI:
10.1093/treephys/17.12.805

35. Changes in activities of antioxidant enzymes and their relationship to genetic and paclobutrazol-induced chilling tolerance of maize seedlings

Author:
Pinhero, R.G.; Rao, M.V.; Paliyath, G.; Murr, D.P.; Fletcher, R.A.
Source:
Plant physiology 1997 v.114 no.2 pp. 695-704
ISSN:
0032-0889
Subject:
paclobutrazol; chemical reactions; seedlings; measurement; roots; glutathione; genotype; peroxidase; protein composition; leaves; Zea mays; superoxide dismutase; enzyme activity; isozymes; antioxidants; ascorbic acid; glutathione-disulfide reductase; cooling; biochemical pathways; genetic variation; cold tolerance
Abstract:
... The potential role of antioxidant enzymes in protecting maize (Zea mays L.) seedlings from chilling injury was examined by analyzing enzyme activities and isozyme profiles of chilling-susceptible (CO 316) and chilling-tolerant (CO 328) inbreds. Leaf superoxide dismutase (SOD) activity in CO 316 was nearly one-half that of CO 328, in which the high activity was maintained during the chilling and po ...

36. Changes in shikimate dehydrogenase and the end products of the shikimate pathway, chlorogenic acid and lignins, during the early development of seedlings of Capsicum annuum

Author:
Diaz, J.; Ros Barcelo, A.; Merino De Caceres, F.
Source:
New phytologist 1997 v.136 no.2 pp. 183-188
ISSN:
0028-646X
Subject:
hypocotyls; Capsicum annuum; caffeic acid; seedlings; lignin; cotyledons; biochemical pathways; gene expression; isozymes; ferulic acid; shikimic acid; cell wall components; chlorogenic acid; alcohol oxidoreductases; histochemistry; roots; leaves; hydro-lyases
DOI:
10.1046/j.1469-8137.1997.00743.x

37. Changes in spatial distribution during the life history of a tropical tree,Scaphium macropodum (Sterculiaceae) in borneo

Author:
Toshihiro Yamada; Eizi Suzuki
Source:
Journal of plant research 1997 v.110 no.2 pp. 179-186
ISSN:
0918-9440
Subject:
Malvaceae; branches; canopy; fruits; germination; juveniles; life history; mortality; saplings; seedling growth; seedlings; soil; spatial variation; tropical rain forests; Borneo; Indonesia
Abstract:
... We studied the spatial distribution of fruits and plants, mortality and growth rates ofScaphium macropodum (Sterculiaceae) in four 1-ha plots in a tropical rain forest in West Kalimantan, Indonesia. The species is a large deciduous tree and produces wind-dispersed fruits on defoliated twigs. The density of dispersed fruits on the ground decreased with increasing distance from a parent tree. The ar ...
DOI:
10.1007/BF02509306

38. Changes in the autolytic activities of maize coleoptile cell walls during coleoptile growth

Author:
Inouhe, M.; Nevins, D.J.
Source:
Plant & cell physiology 1997 v.38 no.2 pp. 161-167
ISSN:
0032-0781
Subject:
coleoptiles; Zea mays; biosynthesis; quantitative analysis; cell walls; seedlings; xylose; glucose; arabinose; glucans; cytolysis; cell wall components
Abstract:
... Autolytic activities of coleoptile cell walls were measured in developing maize seedlings. The major neutral sugar components of the cell wall polysaccharides were arabinose, xylose and glucose. The quantities of all these components per coleoptile increased for 5 d after germination, suggesting that levels are augmented by biosynthetic processes during coleoptile growth. However, cell wall prepar ...
DOI:
10.1093/oxfordjournals.pcp.a029147

39. Changes in the morphology of roots and leaves of carob seedlings induced by nitrogen source and atmospheric carbon dioxide

Author:
Cruz, C.; Lips, S.H.; Martins-Loucao, M.A.
Source:
Annals of botany 1997 v.80 no.6 pp. 817-823
ISSN:
0305-7364
Subject:
carbon dioxide; root systems; diameter; reducing sugars; nitrogen; seedlings; sucrose; leaf area; ammonium compounds; hydroponics; nitrates; Ceratonia siliqua; length; chemical constituents of plants; stomata; biomass; roots
Abstract:
... Carob seedlings were grown hydroponically for 9 weeks under 360 and 800 microliters l-1 CO2. One of two nitrogen sources, nitrate or ammonium, was added to the nutrient medium at concentrations of 3 mol m-2. Root systems of the developing plants supplied with nitrate compared to those supplied with ammonium were characterized by: (a) more biomass on the lower part of the root; (b) fewer lateral ro ...
DOI:
10.1006/anbo.1997.0524

40. Characteristics of lowland broadleaved woodland being restocked by natural regeneration

Author:
Harmer, R.; Kerr, G.; Boswell, R.
Source:
Forestry 1997 v.70 no.3 pp. 199-210
ISSN:
0015-752X
Subject:
woodlands; natural regeneration; canopy; seedlings; stand density; understory; Quercus; Fraxinus excelsior; Betula pendula; England
Abstract:
... A survey of 78 sites in southern England with approved management plans for restocking by natural regeneration was made during the summers of 1993 and 1994. The following features were recorded: species, stocking, canopy cover and seed-bearing potential of trees present in the overstorey; species and canopy cover of the understorey; ground cover; species, browsing damage, number and heights of tre ...
DOI:
10.1093/forestry/70.3.199

41. Characterization of Sitka x interior spruce hybrids: a biotechnological approach to seedlot determination

Author:
Grossnickle, S.C.; Sutton, B.C.S.; Fan, S.; King, J.
Source:
Forestry chronicle 1997 v.73 no.3 pp. 357-362
ISSN:
0015-7546
Subject:
restriction fragment length polymorphism; Picea engelmannii; hybrids; mitochondrial DNA; seedlings; chloroplast DNA; drought tolerance; gas exchange; chemotaxonomy; ecology; Picea glauca; frost resistance; artificial regeneration; genetic variation; plant physiology; Picea sitchensis; introgression; British Columbia
Abstract:
... The Nass Skeena Transition is an area located in British Columbia (BC), Canada, where a large introgression zone occurs between Sitka spruce (Picea sitchensis (Bong.) Carr.) and interior spruce (white spruce, Picea glauca (Moench) Voss x Engelmann spruce, Picea engelmannii Parry ex. Engelm.). When these species hybridize in this transition area, forestry programs face special problems in identifyi ...
DOI:
10.5558/tfc73357-3

42. Characterization of a salicylic acid-insensitive mutant (sai1) of Arabidopsis thaliana, identified in a selective screen utilizing the SA-inducible expression of the tms2 gene

Author:
Shah, J.; Tsui, F.; Klessig, D.F.
Source:
Molecular plant-microbe interactions 1997 v.10 no.1 pp. 69-78
ISSN:
0894-0282
Subject:
Arabidopsis thaliana; promoter regions; metabolism; recombinant DNA; loci; transgenic plants; Agrobacterium radiobacter; seedlings; mutation; Pseudomonas syringae pv. tomato; gene expression; salicylic acid; mutants; reporter genes; amide hydrolases; roots; genetic markers; defense mechanisms
Abstract:
... Salicylic acid (SA) plays an important signaling role in the resistance of many plants to pathogen invasion. Increases in endogenous SA levels have been associated with the hypersensitive response as well as systemic acquired resistance (SAR). SA also induces the expression of a subset of the pathogenesis-related (PR) genes. However, relatively little is known about the events occurring subsequent ...
DOI:
10.1094/MPMI.1997.10.1.69
PubMed:
9002272

43. Characterization of dynamics of the psbD light-induced transcription in mature wheat chloroplasts

Author:
Junko Satoh; Kyoko Baba; Yoichi Nakahira; Takashi Shiina; Yoshinori Toyoshima
Source:
Plant molecular biology 1997 v.33 no.2 pp. 267-278
ISSN:
0167-4412
Subject:
Triticum aestivum; chloroplasts; dark adaptation; messenger RNA; mutation; operon; promoter regions; protein synthesis; seedlings; transcription (genetics); wheat
Abstract:
... Dynamical aspects of three chloroplast promoters responding to change in light condition were examined in mature chloroplasts of wheat (Triticum aestivum) by in vitro transcription. The wheat psbD/C operon has four distinct promoters, two of which named as D/C-3 and D/C-4 promoters dominantly function in mature chloroplasts to produce the mRNAs encoding D2/CP43 and CP43 alone, respectively. Activi ...
DOI:
10.1023/A:1005799001271

44. Characterization of flavonol synthase and leucoanthocyanidin dioxygenase genes in Arabidopsis: further evidence for differential regulation of "early" and "late" genes

Author:
Pelletier, M.K.; Murrell, J.R.; Shirley, B.W.
Source:
Plant physiology 1997 v.113 no.4 pp. 1437-1445
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; seedlings; flavonoids; biosynthesis; chemical reactions; biochemical pathways; lyases; oxygenases; enzyme activity; genes; gene expression; white light; chromosome mapping; inbred lines; mutants; genetic variation; clones; amino acid sequences
Abstract:
... As part of an ongoing investigation into the organization andregulation of the flavonoid biosynthetic pathway, two Arabidopsis thaliana expressed sequence tag (EST) clones (153O10T7 and YAY780) with high homology to leucoanthocyanidin dioxygenase (LDOX) or flavonol synthase (FLS) were identified. EST YAY780 was sequenced and found to encode a protein 49 to 78% identical to all LDOX sequences in th ...
PubMed:
9112784
PubMed Central:
PMC158268

45. Characterization of regions within the n-terminal 6-kilodalton domain of phytochrome A that modulate its biological activity

Author:
Jordan, E.T.; Marita, J.M.; Clough, R.C.; Vierstra, R.D.
Source:
Plant physiology 1997 v.115 no.2 pp. 693-704
ISSN:
0032-0889
Subject:
Avena sativa; seedlings; photoreceptors; red light; far-red light; phytochrome; apoproteins; plant development; alanine; serine; amino acid sequences; gene transfer; transgenic plants; Nicotiana tabacum; gene expression; genetic variation; light harvesting complex
Abstract:
... Phytochrome A (phyA) is a red/far-red (FR) light photoreceptor responsible for initiating numerous light-mediated plant growth and developmental responses, especially in FR light-enriched environments. We previously showed that the first 70 amino acids of the polypeptide contain at least two regions with potentially opposite functions (E.T. Jordan, J.R. Cherry, J.M. Walker, R.D. Vierstra [1996] Pl ...
PubMed:
9342873
PubMed Central:
PMC158530

46. Characterization of the common bean uricase II and its expression in organs other than nodules

Author:
Capote-Mainez, N.; Sanchez, F.
Source:
Plant physiology 1997 v.115 no.4 pp. 1307-1317
ISSN:
0032-0889
Subject:
seedlings; Leucaena leucocephala; Phaseolus vulgaris; genes; hypocotyls; gene expression; Zea mays; metabolism; complementary DNA; genetic code; Bradyrhizobium; root nodules; amino acid sequences; transcription (genetics); phloem; Rhizobium; xylem; enzyme activity; uric acid; symbiosis; cotyledons; oxidoreductases
Abstract:
... Uricase II is a purine metabolic enzyme highly induced in root nodules during the symbiosis established between legumes and bacteria of the genera Rhizobium and Bradyrhizobium. Here we describe the characterization of bean (Phaseolus vulgaris) nodule uricase II cDNA and show that uricase II is encoded by a single gene in the bean genome. This gene is also expressed in cotyledons, roots, and hypoco ...
PubMed:
9414545
PubMed Central:
PMC158596

47. Chloropicrin as a soil fumigant in forest nurseries

Author:
South, D.B.; Carey, W.A.; Enebak, S.A.
Source:
Forestry chronicle 1997 v.73 no.4 pp. 489-494
ISSN:
0015-7546
Subject:
forest nurseries; chloropicrin; soil fumigation; methyl bromide; soil biology; seedlings; Nematoda; soil fungi; weeds; insect pests; Trichoderma; economic analysis; application rate
Abstract:
... Chloropicrin has been tested as a soil fumigant in forest nurseries throughout the world. From 1944 to the late 1960's, tests were conducted in Australia, Canada, Netherlands, New Zealand, the United Kingdom and the United States. Since 1985, studies have been conducted in Georgia, Mississippi, South Carolina, Texas, Virginia, Washington and Wisconsin. In Wisconsin, chloropicrin reduced soilborne ...
DOI:
10.5558/tfc73489-4

48. Cinnamate-4-hydroxylase expression in Arabidopsis regulation in response to development and the environment

Author:
Bell-Lelong, D.A.; Cusumano, J.C.; Meyer, K.; Chapple, C.
Source:
Plant physiology 1997 v.113 no.3 pp. 729-738
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; complementary DNA; ecotypes; genetic code; transgenic plants; seedlings; flowers; cinnamic acid; clones; amino acid sequences; mutants; reporter genes; nucleotide sequences; genetic variation; enzyme activity; oxygenases; roots; leaves
Abstract:
... Cinnamate-4-hydroxylase (C4H) is the first Cyt P450-dependent monooxygenase of the phenylpropanoid pathway. To study the expression of this gene in Arabidopsis thaliana, a C4H cDNA clone from the Arabidopsis expressed sequence tag database was identified and used to isolate its corresponding genomic clone. The entire C4H coding sequence plus 2.9 kb of its promoter were isolated on a 5.4-kb HindIII ...
PubMed:
9085570
PubMed Central:
PMC158190

49. Climatic adaptation of bud set and frost hardiness in Scots pine (Pinus sylvestris)

Author:
Hurme, P.; Repo, T.; Savolainen, O.; Paakkonen, T.
Source:
Canadian journal of forest research 1997 v.27 no.5 pp. 716-723
ISSN:
0045-5067
Subject:
backcrossing; genetic resistance; seedlings; air temperature; frost resistance; latitude; provenance; Pinus sylvestris; seasonal variation; Finland
Abstract:
... The variation of timing of terminal bud set and frost hardening in first-year seedlings of Scots pine (Pinus sylvestris L.) was studied. Both bud set and frost hardiness showed clinal variation with respect to latitude over a steep environmental gradient (60-67 degrees N) in Finland. Northern populations set buds and developed frost hardiness earlier than southern populations. Backcrosses ((north ...
DOI:
10.1139/x97-052

50. Clonal expansion and seedling recruitment of Oregon grape (Berberis nervosa) in Douglas-fir (Pseudotsuga menziesii) forests: comparisons with salal (Gaultheria shallon)

Author:
Huffman, D.W.; Tappeiner, J.C. II.
Source:
Canadian journal of forest research = 1997 v.27 no.11 pp. 1788-1793
ISSN:
0045-5067
Subject:
Gaultheria shallon; seedlings; spatial distribution; clones; plant density; colonizing ability; natural regeneration; Berberis; Pseudotsuga menziesii; stand characteristics; plant morphology; rhizomes; understory; forests; Oregon
Abstract:
... Seedling regeneration and morphology of Oregon grape (Berberis nervosa Pursh) and salal (Gaultheria shallon Pursh) were studied in thinned and unthinned Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the central Coast Range, Oregon. Above- and below-ground growth of both species were significantly and negatively correlated with stand density. Oregon grape appears to have less potenti ...
DOI:
10.1139/x97-150

51. Cloning and biochemical characterization of an anionic peroxidase from Zea mays

Author:
Teichmann, T.; Guan, C.; Kristoffersen, P.; Muster, G.; Tietz, O.; Palme, K.
Source:
European journal of biochemistry 1997 v.247 no.3 pp. 826-832
ISSN:
0014-2956
Subject:
Escherichia coli; Zea mays; apoproteins; coleoptiles; complementary DNA; corn; gene expression; histidine; in situ hybridization; leaves; open reading frames; pH; peroxidase; roots; seedlings
Abstract:
... We have isolated, cloned and characterized a cDNA from Zea mays L., denoted ZmAP1, coding for an anionic peroxidase. The open reading frame of ZmAP1 starting 72 residues from the 5' end of the cDNA predicts a 37778 dalton protein of 356 amino acid residues. The protein has high similarity to other peroxidases and contains two peroxidase motifs that carry two highly conserved histidines in the acti ...
DOI:
10.1111/j.1432-1033.1997.00826.x
PubMed:
9288904

52. Cloning of the cDNA for glutaredoxin, and abundant sieve-tube exudate protein from Ricinus communis L. and characterisation of the glutathione-dependent thiol-reduction system in sieve tubes

Author:
Scederkenyi, J.; Komor, E.; Schobert, C.
Source:
Planta 1997 v.202 no.3 pp. 349-356
ISSN:
0032-0935
Subject:
immunochemistry; dehydroascorbic acid; seedlings; redox reactions; sieve elements; bacterial proteins; plant proteins; trypsin; glutathione; Ricinus communis; gene expression; molecular weight; cysteine; messenger RNA; complementary DNA; eukaryotic cells; amino acid sequences; insulin; cotyledons; nucleotide sequences
Abstract:
... Sieve-tube exudate protein (STEP) from Ricinus communis L. seedlings consists of a characteristic set of more than 100 different polypeptides against which a complex antiserum was raised. This antiserum cross-reacted with dominant protein species (molecular weights 10-30 kDa) present in the sieve-tube exudate and, to a lesser extent, with proteins in tissue extracts of Ricinus and a wide range of ...
DOI:
10.1007/s004250050137

53. Cloning plant genes differentially expressed during colonization of roots of Hordeum vulgare by the vesicular-arbuscular mycorrhizal fungus Glomus intraradices

Author:
Murphy, P.J.; Langridge, P.; Smith, S.E.
Source:
New phytologist 1997 v.135 no.2 pp. 291-301
ISSN:
0028-646X
Subject:
messenger RNA; DNA libraries; vesicular arbuscular mycorrhizae; complementary DNA; Hordeum vulgare; pyrophosphatases; seedlings; amino acid sequences; gene expression; nucleotide sequences; Rhizophagus intraradices; nucleic acid hybridization; roots
DOI:
10.1046/j.1469-8137.1997.00652.x

54. Cluster roots and mycorrhizae in Casuarina cunninghamiana: their occurrence and formation in relation to phosphorus supply

Author:
Reddell, P.; Yun, Y.; Shipton, W.A.
Source:
Australian journal of botany 1997 v.45 no.1 pp. 41-51
ISSN:
0067-1924
Subject:
ectomycorrhizae; seedling growth; nitrogen fixation; dose response; vesicular arbuscular mycorrhizae; nitrogen; seedlings; nutrient availability; phosphoric monoester hydrolases; Casuarina cunninghamiana; phosphorus; roots; enzyme activity; Queensland
DOI:
10.1071/BT96049

55. Comparative assessments of seedling runner and adult-plant resistance to leaf scorch in strawberry

Author:
Xue, A.G.; Sutton, J.C.; Dale, A.
Source:
Canadian journal of plant science 1997 v.77 no.2 pp. 279-281
ISSN:
0008-4220
Subject:
cultivars; plant breeding; Fragaria ananassa; seedlings; Diplocarpon earlianum; pathogenicity; plant pathogenic fungi; disease resistance; genotype; genetic variation; Ontario
DOI:
10.4141/P96-035

56. Comparative ecophysiology of Chrysanthemum pacificum Nakai and solidago altissima L. 1. why S. altissima cannot be established on the seashore

Author:
Hiroshi Yura
Source:
Ecological research 1997 v.12 no.3 pp. 313-323
ISSN:
0912-3814
Subject:
ecophysiology; environmental factors; mortality; seasonal variation; seedlings; seeds; shoots; sodium; soil water; soil water content; water content
Abstract:
... A field survey was made to elucidate whether salt spray is a major factor in preventing a common inland weed, Solidago altissima, from being established on the seashore of Boso Peninsula. Seasonal changes in the intensity of salt spray, sodium content in the soil water and soil water contents were measured at the seashore and inland. Seeds of S. altissima were sown at both sites with those of a co ...
DOI:
10.1007/BF02529461

57. Comparison of Seed-Derived Lines from ‘Florigraze’ Rhizoma Perennial Peanut

Author:
B. C. Venuto; W. M. Elkins; R. W. Hintz; R. L. Reed
Source:
Crop science 1997 v.37 no.4 pp. 1098-1102
ISSN:
0011-183X
Subject:
germplasm; crop quality; flowering; seedlings; height; agronomic traits; plant density; forage; leaves; crop yield; crude protein; progeny; seed productivity; line differences; plant morphology; Arachis glabrata; Louisiana
Abstract:
... Rhizoma perennial peanut (RPP—Arachis glabrata Benth.) is a high quality, vegetatively propagated, forage legume introduced into southern USA from South America. Information on the performance of seed-derived lines from this germplasm is lacking. This information is needed to help determine the feasibility of establishing a recurrent selection breeding program to improve the performance of this ge ...
DOI:
10.2135/cropsci1997.0011183X003700040011x

58. Comparison of secale with other perennial grasses under grazing at a cool site in the high rainfall zone of New South Wales

Author:
Freer, M.; Donnelly, J.R.; Axelsen, A.; Myers, L.F.; Davidson, J.L.; Dymock, J.
Source:
Animal production science 1997 v.37 no.1 pp. 19-25
ISSN:
0816-1089
Subject:
Secale strictum subsp. strictum; Phalaris; Trifolium; Lolium; Dactylis glomerata; mortality; superphosphate; phosphorus; soil fertility; seedlings; germination; grazing; wethers; stocking rate; range management; animal production; New South Wales
DOI:
10.1071/EA96062

59. Competition-Induced Reductions in Soil Water Availability Reduced Pine Root Extension Rates

Author:
K. H. Ludovici; L. A. Morris
Source:
Soil Science Society of America journal 1997 v.61 no.4 pp. 1196-1202
ISSN:
0361-5995
Subject:
Pinus taeda; seedlings; Pisolithus tinctorius; Digitaria; crop-weed competition; roots; shoots; seedling growth; soil water content; root systems; spatial distribution; drought; water stress; mycorrhizae
Abstract:
... The relationship between soil water availability, root extension, and shoot growth of loblolly pine seedlings (Pinus taeda L.) was evaluated in a rhizotron sand mixture in the absence and presence of crabgrass (Digitaria spp.) competition. Heights and diameters of seedlings grown with crabgrass were reduced 33 and 50%, respectively, compared with seedlings grown in pine monoculture. Furthermore, s ...
DOI:
10.2136/sssaj1997.03615995006100040027x

60. Components of relative growth rate and their interrelations in 59 temperate plant species

Author:
Hunt, R.; Cornelissen, J.H.C.
Source:
New phytologist 1997 v.135 no.3 pp. 395-417
ISSN:
0028-646X
Subject:
seedlings; light intensity; roots; shoots; nitrogen content; Magnoliopsida; forage; photosynthesis; root shoot ratio; leaves; weight; leaf area; water content; woody plants; statistical analysis; biomass production; dry matter partitioning; Liliopsida; plant morphology; habitats; Great Britain
DOI:
10.1046/j.1469-8137.1997.00671.x

61. Conifer root discimination against soil nitrate and the ecology of forest succession

Author:
Kronzucker, H.J.; Yaeesh Siddiqi, M.; Glass, A.D.M.
Source:
Nature 1997 v.385 no.6611 pp. 59-61
ISSN:
0028-0836
Subject:
Picea glauca; afforestation; roots; nutrient uptake; ammonium nitrogen; nitrate nitrogen; forest soils; ecological succession; seedlings; plant ecology
Abstract:
... The high incidence of failure when late-successional conifer species are replanted on disturbed forest sites is a considerable problem. Here we advance a hypothesis that might explain many of these reforestation problems on a physiological basis, within the framework of forest succession. It is known that the chemical speciation of inorganic nitrogen in forest soils changes from predominantly ammo ...
DOI:
10.1038/385059a0

62. Contamination and deterioration of alfalfa sprouts caused by a seedborne isolate of Erwinia herbicola

Author:
Moline, H.E.; Kulik, M.M.
Source:
Journal of food quality 1997 v.20 no.1 pp. 53-60
ISSN:
0146-9428
Subject:
seed germination; testa; seedlings; Medicago sativa; microbial contamination; sterilizing; alfalfa; food packaging; surfaces; plastics; storage; seed storage; Pantoea agglomerans; mortality
Abstract:
... A Gram negative, rod-shaped, yellow-pigmented bacterium was recovered from beneath the seed coats of surface-sterilized alfalfa seed from three seed lots used for the commercial production of sprouts. This bacterium was responsible for the deterioration of alfalfa sprouts marketed in film-wrapped plastic containers. Identity of the isolate was confirmed as Erwinia herbicola (Lohnis) Dye (synonym P ...
DOI:
10.1111/j.1745-4557.1997.tb00451.x

63. Conversion of indole-3-acetaldehyde to indole-3-acetic acid in cell-wall fraction of barley (Hordeum vulgare) seedlings

Author:
Tsurusaki, K.; Takeda, K.; Sakurai, N.
Source:
Plant & cell physiology 1997 v.38 no.3 pp. 268-273
ISSN:
0032-0781
Subject:
biosynthesis; Hordeum vulgare; seedlings; acetaldehyde; biochemical pathways; binding sites; indole acetic acid; oxidation; cell wall components; metabolites
Abstract:
... The cell-wall fraction of barley seedlings was able to oxidize indole-3-acetaldehyde (IAAld) to form IAA, whereas the fraction did not catalyze the conversion of indole-3-acetonitrile or indole-3-acetamide to IAA. The activity was lower in a semi-dwarf mutant that had an endogenous IAA level lower than that of the normal isogenic strain [Inouhe et al. (1982) Plant Cell Physiol. 23: 689]. The solub ...
DOI:
10.1093/oxfordjournals.pcp.a029162

64. Copper and nickel uptake, accumulation and tolerance in Typha latifolia with and without iron plaque on the root surface

Author:
Z. H. YE; A. J. M. BAKER; M. H. WONG; A. J. WILLIS
Source:
new phytologist 1997 v.136 no.3 pp. 481-488
ISSN:
0028-646X
Subject:
Typha latifolia; copper; nickel; iron; mineral metabolism; surfaces; roots; nutrient solutions; seedlings; adsorption; length; shoots; leaves; metal tolerance; translocation (plant physiology)
Abstract:
... The effects of iron plaque on the growth of Typha latifolia L. and accumulation of copper and nickel in T. latifolia were investigated under laboratory conditions in nutrient solution cultures. Seedlings with and without iron plaque on their roots were exposed to 0.05 μg ml⁻¹ Cu and 0.10 μg ml⁻¹ Ni solutions for 72 d. The results showed no differences in root and shoot d. wt and leaf elongation wh ...
DOI:
10.1046/j.1469-8137.1997.00758.x

65. Correlation between potassium efflux and copper sensitivity in 10 Arabidopsis ecotypes

Author:
Murphy, A.; Taiz, L.
Source:
New phytologist 1997 v.136 no.2 pp. 211-222
ISSN:
0028-646X
Subject:
Arabidopsis thaliana; weight; nutrient transport; nutrient content; ecotypes; copper; seedlings; phytotoxicity; varieties; potassium; cell membranes; metal tolerance; roots; permeability
DOI:
10.1046/j.1469-8137.1997.00738.x

66. Cytoplasmic free Ca2+ in Arabidopsis roots changes in response to touch but not gravity

Author:
Legue, V.; Blancaflor, E.; Wymer, C.; Perbal, G.; Fantin, D.; Gilroy, S.
Source:
Plant physiology 1997 v.114 no.3 pp. 789-800
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; chemical composition; image analysis; quantitative analysis; cell growth; seedlings; calcium; thigmotropism; geotaxis; root meristems; cytoplasm; gravity
Abstract:
... Changes in cytoplasmic Ca2+ concentration ([Ca2+]i) have been proposed to be involved in signal transduction pathways in response to a number of stimuli, including gravity and touch. The current hypothesis proposes that the development of gravitropic bending is correlated with a redistribution of [Ca2+]i in gravistimulated roots. However, no study has demonstrated clearly the development of an asy ...
PubMed:
9232870
PubMed Central:
PMC158365

67. Daily variation in glucosinolate concentrations in the leaves and roots of cabbage seedlings in two constant temperature regimes

Author:
Rosa, E.A.S.
Source:
Journal of the science of food and agriculture 1997 v.73 no.3 pp. 364-368
ISSN:
0022-5142
Subject:
Brassica oleracea var. capitata; roots; leaves; seedlings; glucosinolates; diurnal variation; air temperature; chemical constituents of plants
Abstract:
... Limited information is available on the glucosinolate variation within the Brassica plant and the relationship between the pattern and concentration of glucosinolates in the aerial parts and the roots has received little attention. Early studies carried out under field conditions have shown that glucosinolate levels may vary considerably throughout a 24 h period. The purpose of the present study w ...
DOI:
10.1002/(SICI)1097-0010(199703)73:3<364::AID-JSFA742>3.0.CO;2-O

68. Dehardening and second-year growth of white spruce provenances in response to duration of long-night treatments

Author:
Coursolle, C.; Bigras, F.J.; Margolis, H.A.; Hebert, C.
Source:
Canadian journal of forest research = 1997 v.27 no.8 pp. 1168-1175
ISSN:
0045-5067
Subject:
buds; seedlings; acclimation; dry matter accumulation; frost injury; Picea glauca; frost resistance; provenance; seasonal variation; photoperiod; plant morphology; roots; shoots; Quebec
Abstract:
... Long-night treatments (16 h) of 0 (control), 4, 8, 12, and 16 days duration were applied, in August 1994, to four provenances of 10-week-old white spruce (Picea glauca (Moench) Voss) seedings. This was to determine the shortest duration that would produce seedlings having acceptable morphological and physiological characteristics for reforestation. The effects of these treatments and of the latitu ...
DOI:
10.1139/x97-068

69. Determining year of death of logs and snags of Thuja plicata in southwestern coastal British Columbia

Author:
Daniels, L.D.; Dobry, J.; Klinka, K.; Feller, M.C.
Source:
Canadian journal of forest research 1997 v.27 no.7 pp. 1132-1141
ISSN:
0045-5067
Subject:
Thuja plicata; growth rings; seedlings; dead wood; decayed wood; duration; dendrochronology; degradation; radiocarbon dating; British Columbia
Abstract:
... The years of death of Thuja plicata (Donn ex D. Don in Lamb.) logs and snags from cool mesothermal forests of southwestern coastal British Columbia are reported. We sampled 15 logs in decay classes I (recent) to IV (old) and 17 snags in decay classes III (recent) to VI (old). Stages of decay were determined from the physical structure of each bole using published methods. Decay class IV logs, aged ...
DOI:
10.1139/x97-055

70. Development of a powder formulation of Pseudomonas fluorescens for control of rice blast

Author:
Vidhyasekaran, P.; Rabindran, R.; Muthamilan, M.; Nayar, K.; Rajappan, K.; Subramanian, N.; Vasumathi, K.
Source:
Plant pathology 1997 v.46 no.3 pp. 291-297
ISSN:
0032-0862
Subject:
Oryza sativa; Pseudomonas fluorescens; Magnaporthe grisea; biological control agents; biological control; powders; infection; roots; stems; leaves; foliar spraying; virulence; seedlings; crop yield; seed treatment; India
DOI:
10.1046/j.1365-3059.1997.d01-27.x

71. Development of laboratory-based methods for assessing seedling thermotolerance in pearl millet

Author:
Howarth, C.J.; Pollock, C.J.; Peacock, J.M.
Source:
New phytologist 1997 v.137 no.1 pp. 129-139
ISSN:
0028-646X
Subject:
Pennisetum glaucum; Sorghum bicolor; temperature; heat tolerance; screening; seedlings; cell membranes; regrowth; protein synthesis; electrolytes; heat treatment; acclimation; genotype
DOI:
10.1046/j.1469-8137.1997.00827.x

72. Developmental and light-dependent changes of the cytosolic chaperonin containing TCP-1 (CCT) subunits in maize seedlings, and the localization in coleoptiles

Author:
Himmelspach, R.; Nick, P.; Schafer, E.; Ehmann, B.
Source:
plant journal 1997 v.12 no.6 pp. 1299-1310
ISSN:
0960-7412
Subject:
far-red light; coleoptiles; plant development; Zea mays; tubulin; seedlings; cytoskeleton; cytochemistry; actin; molecular weight; histochemistry; mesocotyls; plant proteins
Abstract:
... The cytosolic chaperonin containing TCP-1 (CCT) is known to keep fold cytoskeletal proteins and is involved in the proper organization of the cytoskeleton. These studies are based on the assumption that growth responses linked to structural rearrangement of the plant cytoskeleton include the action of CCT and the need for newly synthesized tubulin. The presence of the alpha- and epsilon- subunits ...
DOI:
10.1046/j.1365-313x.1997.12061299.x

73. Developmental and pathogen-induced accumulation of transcripts of polygalacturonase-inhibiting protein in Phaseolus vulgaris L

Author:
Devoto, A.; Clark, A.J.; Nuss, L.; Cervone, F.; De Lorenzo, G.
Source:
Planta 1997 v.202 no.3 pp. 284-292
ISSN:
0032-0935
Subject:
cortex; messenger RNA; infection; stems; hypocotyls; seedlings; polygalacturonase; defense mechanisms; flowers; Phaseolus vulgaris; gene expression; enzyme inhibitors; Colletotrichum lindemuthianum; genes; histochemistry; light; roots; leaves; pods
Abstract:
... Expression of the polygalacturonase-inhibiting-protein gene (pgip) during development of French bean (Phaseolus vulgaris L. cv. Red Kidney) was analysed in various organs, including leaves, stems and roots of etiolated and light-grown seedlings, light-grown adult plants, as well as flowers, pods, and seeds. In light-grown seedlings and plants, pgip transcripts were detected in all tissues examined ...
DOI:
10.1007/s004250050130

74. Difference in leaf quality between canopy trees and seedlings affects migration and survival of spring-feeding moth larvae

Author:
Murakami, M.; Wada, N.
Source:
Canadian journal of forest research = 1997 v.27 no.9 pp. 1351-1356
ISSN:
0045-5067
Subject:
Lepidoptera; larvae; leaves; seasonal variation; seedlings; canopy; tannins; nitrogen content; water content; pupae; nutrient content; chemical constituents of plants; Japan
Abstract:
... The migratory behavior of moth larvae feeding on oak (Quercus crispula) leaves in spring was investigated with reference to seasonal changes in the quality of the canopy and current-year seedling leaves. After budbreak, the leaf toughness and tannin content of canopy trees increased, while the nitrogen and water contents decreased. These changes in leaf quality appeared to force the moth larvae to ...
DOI:
10.1139/x97-097

75. Different levels of morphometric variation in three heterogamous dogrose species (Rosa sect.Caninae, Rosaceae)

Author:
Hilde Nybom; Ulrika Carlson-Nilsson; Gun Werlemark; Madeleine Uggla
Source:
Plant systematics and evolution 1997 v.204 no.3-4 pp. 207-224
ISSN:
0378-2697
Subject:
Rosa; analysis of variance; intraspecific variation; morphometry; plant breeding; seedlings; taxonomy; Sweden
Abstract:
... Difficulties in delimiting well-defined entities in the dogroses (Rosa sect.Caninae) has resulted in very variable taxonomic treatments. The present study was undertaken to provide a background for taxonomy as well as plant breeding. Morphometric diversity was analysed on seedlings obtained from field collections in South Sweden of three species,Rosa dumalis, R. rubiginosa andR. villosa. A canonic ...
DOI:
10.1007/BF00989206

76. Differential cultivars and criteria for evaluating resistance to Rhizoctonia solani in seedling Brassica oleracea

Author:
Keinath, A.P.; Farnham, M.W.
Source:
Plant disease 1997 v.81 no.8 pp. 946-952
ISSN:
0191-2917
Subject:
Brassica oleracea; cultivars; seedlings; Thanatephorus cucumeris; disease resistance; inoculum; incidence; germplasm; screening; genetic resistance; fungal diseases of plants; disease incidence; disease severity
Abstract:
... Growth-room and field experiments were conducted to develop methods of studying resistance in Brassica oleracea crops to Rhizoctonia solani anastomosis groups (AG) 2-1 and 4, causal agents of wirestem. Seedlings of 12 cultivars (3 each of broccoli, cauliflower, cabbage, and collard) at the four- to five-leaf stage were transplanted to trays in a growth room and covered with steamed soil infested w ...
DOI:
10.1094/PDIS.1997.81.8.946

77. Differential expression of the multigene family encoding the soybean mitochondrial alternative oxidase

Author:
Finnegan, P.M.; Whelan, J.; Millar, A.H.; Zhang, Q.; Smith, M.K.; Wiskich, J.T.; Day, D.A.
Source:
Plant physiology 1997 v.114 no.2 pp. 455-466
ISSN:
0032-0889
Subject:
Glycine max; protein synthesis; quantitative analysis; complementary DNA; genetic code; seedlings; cotyledons; amino acid sequences; oxidoreductases; gene expression; transcription (genetics); mitochondria; genes; enzyme activity; roots; protein composition
Abstract:
... The alternative oxidase (AOX) of the soybean (Glycine max L.) inner mitochondrial membrane isencoded by a multigene family (Aox) with three known members. Here, the Aox2 and Aox3 primary translation products, deduced from cDNA analysis, were found to be 38.1 and 36.4 kD, respectively. Direct N-terminal sequencing of partially purified AOX from cotyledons demonstrates that the mature proteins are 3 ...
PubMed:
9193084
PubMed Central:
PMC158325

78. Differential expression of two functional serine/threonine protein kinases from soyabean that have an unusual acidic domain at the carboxy terminus

Author:
Yoon, H.W.; Kim, M.C.; Shin, P.G.; Kim, J.S.; Kim, C.Y.; Lee, S.Y.; Hwang, I.; Bahk, J.D.; Hong, J.C.; Han, C.
Source:
MGG 1997 v.255 no.4 pp. 359-371
ISSN:
0026-8925
Subject:
Glycine max; complementary DNA; nucleotide sequences; amino acid sequences; structural genes; gene expression; messenger RNA; seedlings; abscisic acid; sodium chloride; salinity; water stress; enzyme activity; phosphorylation; plant proteins
DOI:
10.1007/s004380050507

79. Differential induction of lipoxygenase isoforms in wheat upon treatment with rust fungus elicitor, chitin oligosaccharides, chitosan, and methyl jasmonate

Author:
Bohland, C.; Balkenhohl, T.; Loers, G.; Feussner, I.; Grambow, H.J.
Source:
Plant physiology 1997 v.114 no.2 pp. 679-685
ISSN:
0032-0889
Subject:
protein synthesis; dose response; chitosan; seedlings; jasmonic acid; linoleate 13S-lipoxygenase; Puccinia graminis; Triticum aestivum; leaves; plant pathogenic fungi; oligosaccharides; chitin; enzyme activity; isozymes; protein composition
Abstract:
... A glycopeptide elicitor prepared from germ tubes of the rust fungus Puccinia graminis Pers. f. sp. tritici Erikss. & Henn (Pgt),as well as chitin oligosaccharides, chitosan, and methyl jasmonate (MJ) stimulated lipoxygenase (LOX) activity (E.C. 1.13.11.12) in wheat (Triticum aestivum) leaves. Immunoblot analysis using anti-LOX antibodies revealed the induction of 92- and 103-kD LOX species after P ...

80. Differential induction of pyruvate decarboxylase subunits and transcripts in anoxic rice seedlings

Author:
Rivosal, J.; Thind, S.; Pradet, A.; Ricard, B.
Source:
Plant physiology 1997 v.114 no.3 pp. 1021-1029
ISSN:
0032-0889
Subject:
Oryza sativa; seedlings; protein composition; pyruvate decarboxylase; enzyme activity; anaerobic conditions; complementary DNA; gene expression; messenger RNA; nucleotide sequences; amino acid sequences; transcription (genetics); stress response
Abstract:
... In 2-d-old rice (Oryza sativa L.) seedlings subjected to anoxic stress, pyruvate decarboxylase (PDC) activity increased 9-fold during a 168-h period. A polyclonal PDC antiserum that recognized alpha- and beta-subunits was used to quantify PDC protein by an enzyme-linked immunosorbent assay and showed a 5.6-fold increase, suggesting that the anoxically induced enzyme has a higher specific activity ...
PubMed:
9232881
PubMed Central:
PMC158390

81. Direct comparison of pollen-mediated movement of native and engineered genes

Author:
Stan C. Hokanson; James F. Hancock; Rebecca Grumet
Source:
Euphytica 1997 v.96 no.3 pp. 397-403
ISSN:
0014-2336
Subject:
Cucumis melo; cotyledons; enzyme-linked immunosorbent assay; genetic markers; melons; plant breeding; pollen; pollen flow; polymerase chain reaction; risk; satellites; seedlings; transgenes; transgenic plants; wild relatives; United States
Abstract:
... Despite the commercial approval of twenty-five transgenic crops in the U.S. as of mid-1996, concern is still being expressed regarding the potential risks associated with genetically engineered crops. One recurring issue is the possibility of pollen-mediated escape of engineered genes into populations of crop wild relatives. To address this concern, the scientific community has depended on literat ...
DOI:
10.1023/A:1003061501477

82. Direct shoot formation and plant regeneration from cotyledon explants of rapid-cycling Brassica rapa

Author:
Teo, W.; Lakshmanan, P.; Kumar, P.; Goh, C.J.; Swarup, S.
Source:
In vitro cellular & developmental biology 1997 v.33 no.4 pp. 288-292
ISSN:
1054-5476
Subject:
tissue culture; roots; seedlings; indole butyric acid; explants; cotyledons; rooting; benzyladenine; naphthaleneacetic acid; petioles; Brassica rapa subsp. oleifera; culture media; silver nitrate; shoots
DOI:
10.1007/s11627-997-0052-4

83. Direct shoot regeneration from excised leaf explants of in vitro grown seedlings of Alstroemeria L

Author:
Lin, H.S.; Jeu, M.J. de.; Jacobsen, E.
Source:
Plant cell reports 1997 v.16 no.11 pp. 770-774
ISSN:
0721-7714
Subject:
dose response; cell growth; glucose; seedlings; sucrose; indole butyric acid; explants; benzyladenine; micropropagation; Alstroemeria; culture media; silver nitrate; leaves; shoots
Abstract:
... A two-step protocol for the induction of shoots from Alstroemeria leaf explants has been developed. Leaf explants with stem node tissue attached were incubated on shoot induction medium for 10 days, and then transferred to regeneration medium. Shoots from the area adjacent to the region between the leaf base and node tissue regenerated within 3 weeks after transfer to the regeneration medium, with ...
DOI:
10.1007/s002990050317

84. Direct somatic embryogenesis and plantlet regeneration from seedling leaves of winged bean, Psophocarpus tetragonolobus (L.) DC

Author:
Dutta Gupta, S.; Ahmed, R.; De, D.N.
Source:
Plant cell reports 1997 v.16 no.9 pp. 628-631
ISSN:
0721-7714
Subject:
dose response; Psophocarpus tetragonolobus; seedlings; indole butyric acid; explants; somatic embryogenesis; plant morphology; benzyladenine; indole acetic acid; naphthaleneacetic acid; abscisic acid; 2,4-D; culture media; leaves
Abstract:
... Excised seedling leaf segments of winged bean [Psophocarpus tetragonolobus (L.) DC.] underwent direct somatic embryogenesis under appropriate incubation conditions. Initiation and development of the somatic embryos occurred using a two-step culture method. The culture procedure involved incubation for 28 days on MS basal medium supplemented with 0.1-0.5 mg/l NAA and 1.0-2.0 mg/l BA (induction medi ...
DOI:
10.1007/BF01275504

85. Disruption of the phosphate-starvation response of oilseed rape suspension cells by the fungicide phosphonate

Author:
Carswell, M.C.; Grant, B.R.; Plaxton, W.C.
Source:
Planta 1997 v.203 no.1 pp. 67-74
ISSN:
0032-0935
Subject:
Brassica napus; phosphonates; cell suspension culture; nutrient deficiencies; acid phosphatase; enzyme activity; nutrient transport; isozymes; molecular weight; pyruvate kinase; seedlings; phosphates; plasma membrane
Abstract:
... The influence of the anti-fungal agent phosphonate (Phi) on the response of oilseed rape (Brassica napus L. cv. Jet Neuf) cell suspensions to inorganic phosphate (Pi) starvation was examined. Subculture of the cells for 7 d in the absence of Pi increased acid phosphatase (APase; EC 3.1.3.2) and pyrophosphate (PPi)-dependent phosphofructokinase (PFP; EC 2.7.1.90) activities by 4.5- and 2.8-fold, re ...
DOI:
10.1007/s004250050166
PubMed:
9299791

86. Distance effect of co-occurring tree species on pine wilt disease incidence in Pinus densiflora seedlings inoculated with Bursaphelenchus xylophilus

Author:
Katsunori Nakamura; Katsumi Togashi; Fumiki Takahashi
Source:
Ecological research 1997 v.12 no.3 pp. 265-275
ISSN:
0912-3814
Subject:
Alnus; Bursaphelenchus xylophilus; Pinus densiflora; disease incidence; mixed stands; seedlings; trees; vascular wilt
Abstract:
... Field-grown Pinus densiflora seedlings were inoculated with Bursaphelenchus xylophilus and the incidence of pine wilt disease was analyzed with respect to the spatial relationships between pine seedlings and adjacent seedlings of other tree species in a pure pine stand and three stands mixed with Alnus sieboldiana, Sarothamus scoparius or naturally associated species. The disease incidence was 60. ...
DOI:
10.1007/BF02529456

87. Distribution of folate derivatives and enzymes for synthesis for 10-formyltetrahydrofolate in cytosolic and mitochondrial fractions of pea leaves

Author:
Chen, L.F.; Chan, S.Y.; Cossins, E.A.
Source:
Plant physiology 1997 v.115 no.1 pp. 299-309
ISSN:
0032-0889
Subject:
protein content; chemical reactions; dihydrofolate reductase; seedlings; cytosol; biochemical pathways; hydrolases; mitochondria; folic acid; etiolation; Pisum sativum; light; enzyme activity; leaves
Abstract:
... Leaf extracts of 14-d-old pea (Pisum sativum L. cv Homesteader) seedlings were examined for folate derivatives and for 10-formyltetrahydrofolate synthetase (SYN), 5,10-methenyltetrahydrofolate cyclohydrolase (CYC), and 5,10-methylenetetrahydrofolate dehydrogenase (DHY) activities. Microbiological and enzyme assays showed that leaf folates SYN, CYC, and DHY were predominately cytosolic. Extracts of ...

88. Diurnal fluctuations in ethylene formation in Chenopodium rubrum

Author:
Machackova, I.; Chauvaux, N.; Dewitte, W.; Onckelen, H. van.
Source:
Plant physiology 1997 v.113 no.3 pp. 981-985
ISSN:
0032-0889
Subject:
1-aminocyclopropane-1-carboxylic acid; Chenopodium rubrum; seedlings; light; dose response; ethylene; biosynthesis; diurnal variation; photoperiod; flowering; shoots; roots; quantitative analysis; malonic acid; oxidoreductases; enzyme activity; chemical constituents of plants; indole acetic acid
Abstract:
... Ethylene formation was studied in 5- to 6-d-old Chenopodium rubrum seedlings under the following light regimes: continuous light (CL), continuous darkness (CD), and alternating light/darkness (12 h of each). No significant regular oscillations in ethylene formation were found in either the CL or CD groups. In the light/dark regime, pronounced diurnal fluctuations in ethylene formation were observe ...

89. Dosage Dependent Genetic Suppression of Oat Crown Rust Resistance Gene Pc-62

Author:
W. A. Wilson; M. S. McMullen
Source:
Crop science 1997 v.37 no.6 pp. 1699-1705
ISSN:
0011-183X
Subject:
crossing; Avena sativa; Puccinia coronata; disease resistance; seedlings; progeny; chromosome translocation; chromosome mapping; gene dosage; germ cells; cultivars; diallel analysis; alleles; gene interaction; genetic resistance
Abstract:
... Combining crown rust resistance (CRR) genes is an objective many oat (Avena sativa L.) breeding programs. Genetic suppressors of CRR have been reported, but the genetic nature of such suppressors has not been investigated. An excess of susceptible seedlings in segregating progeny of crosses involving genotypes with Pc-38 and Pc-62 suggested the Pc-38 parent may have a factor that inhibits the expr ...
DOI:
10.2135/cropsci1997.0011183X003700060004x

90. Dry matter production, population structure and environmental conditions of the spring ephemeralErythronium japonicum growing in various habitats differing in sunlight exposure in cool temperate Japan

Author:
Shinichi Sawada; Saori Chida; Yuuki Sawaguchi; Nobutaka Nagasawa
Source:
Ecological research 1997 v.12 no.1 pp. 89-99
ISSN:
0912-3814
Subject:
underground parts; seedlings; plant density; trees; forests; phenology; dry matter accumulation; water stress; photosynthesis; Angiospermae; population structure; solar radiation; heat; leaf area; temperate zones; sexual maturity; survival rate; spring; environmental factors; habitats; Japan
Abstract:
... Phenology, dry matter production, population structure and environmental conditions were examined in Erythronium japonicum Decne plants growing on the floor of a deciduous broad-leaved Quercus mongolica forest (Q.m. stand), an evergreen coniferous Cryptomeria japonica plantation (C. j. stand) and bare ground left for 3 years after the clearing of a forest composed of young Q. mongolica and Pinus d ...
DOI:
10.1007/BF02523614

91. Dynamics of nutrient remobilisation from seed of wheat genotypes during imbibition, germination and early seedling growth

Author:
M. Moussavi-Nik; Z. Rengel; J.N. Pearson; G. Hollamby
Source:
Plant and soil 1997 v.197 no.2 pp. 271-280
ISSN:
0032-079X
Subject:
Triticum aestivum; calcium; copper; cultivars; dry matter accumulation; endosperm; genotype; imbibition; iron; manganese; mature plants; nutrient content; nutrients; phosphorus; potassium; roots; seed germination; seedling growth; seedlings; shoots; testa; wheat; zinc
Abstract:
... The changes in nutrient content of grain tissues and seedling parts of two wheat genotypes (Triticum aestivum L., Excalibur and Janz) with low or high seed Zn content were followed from imbibition to early seedling development (12 days). The grains were separated into seed coat, endosperm and embryo, while the seedlings were separated into roots and shoots. The dry weight of the seed coat did not ...
DOI:
10.1023/A:1004227400287

92. Ectomycorrhizal associations of northern red oak (Quercus rubra) seedlings along an environmental gradient

Author:
Zhou, M.; Sharik, T.L.
Source:
Canadian journal of forest research 1997 v.27 no.11 pp. 1705-1713
ISSN:
0045-5067
Subject:
ectomycorrhizae; mineralization; plant development; canopy; diameter; Quercus rubra; stems; soil water content; nitrogen; seedlings; host plants; microhabitats; light intensity; biomass; roots; shoots; Michigan
Abstract:
... Inconsistencies in the relationship between abundance of ectomycorrhizae (ECM) and characteristics of their host plants abound in the published literature. To determine whether such inconsistencies are related to environmental conditions, we conducted a study of ECM of Quercus rubra L. seedlings along an environmental gradient in oak and pine forests in northern Lower Michigan. The gradient was cr ...
DOI:
10.1139/x97-120

93. Ectomycorrhizal diversity on Betula papyrifera and Pseudotsuga menziesii seedlings grown in the greenhouse or outplanted in single-species and mixed plots in southern British Columbia

Author:
Jones, M.D.; Durall, D.M.; Harniman, S.M.K.; Classen, D.C.; Simard, S.W.
Source:
Canadian journal of forest research = 1997 v.27 no.11 pp. 1872-1889
ISSN:
0045-5067
Subject:
Betula papyrifera; Pseudotsuga menziesii; seedlings; species diversity; genotype mixtures; logging; fungal anatomy; bioassays; mycorrhizal fungi; colonizing ability; root systems; mixed forests; stand density; ectomycorrhizae; British Columbia
Abstract:
... The inoculum potential and diversity of the ectomycorrhizal fungal community usually decrease on a site following logging. The objective of this study was to determine if planting a mixture of tree species following logging retains a higher diversity of ectomycorrhizal fungi than planting a single species. Paper birch (Betula papyrifera Marsh.) and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco ...
DOI:
10.1139/x97-160

94. Effect of bunt infection on the frost resistance of wheat varieties and of lines containing Bt genes

Author:
Veisz, O.B.; Szunics, L.
Source:
Plant breeding 1997 v.116 no.2 pp. 123-126
ISSN:
0179-9541
Subject:
seedlings; fungal diseases of plants; varieties; frost resistance; Triticum aestivum; disease resistance; Tilletia laevis; genes
DOI:
10.1111/j.1439-0523.1997.tb02165.x

95. Effect of cadimum treatment on the expression of chimeric genes in transgenic tobacco seedlings and calli

Author:
Stefanov, I.; Frank, J.; Gedamu, L.; Misra, S.
Source:
Plant cell reports 1997 v.16 no.5 pp. 291-294
ISSN:
0721-7714
Subject:
Nicotiana tabacum; cadmium; dose response; phytotoxicity; plant breeding; chromosome mapping; gene transfer; transgenic plants; chimerism; reporter genes; gene expression; seedlings; callus; beta-glucuronidase; enzyme activity; measurement; glucuronic acid; transcription (genetics); promoter regions
Abstract:
... Transgenic tobacco plants and calli bearing the bacterial uidA A gene under the transcriptional control of rbcS, mas and CaMV35S promoter(s) were exposed to different concentrations of cadmium. The transcriptional activity of the promoters was monitored using p-nitrophenyl beta-D-glucuronide as a substrate for the beta-glucuronidase (uidA) reporter enzyme. The rbcS promoter was repressed by high c ...
DOI:
10.1007/BF01088283

96. Effect of dew period and temperature on the ability of Exserohilum monoceras to cause seedling mortality of Echinochloa species

Author:
Zhang, W.M.; Watson, A.K.
Source:
Plant disease 1997 v.81 no.6 pp. 629-634
ISSN:
0191-2917
Subject:
infection; Oryza sativa; Echinochloa colona; seedlings; weeds; weed control; biological control; Exserohilum; dew; duration; air temperature; mortality; virulence; frequency
Abstract:
... In greenhouse and controlled environment experiments, disease development and mortality of Echinochloa crus-galli, E. colona, and E. glabrescens caused by Exserohilum monoceras were affected by duration, frequency, and timing of dew period, as well as by dew-period temperature and post-dew temperature. When adequate dew was provided, 100% mortality occurred for all three Echinochloa spp. over the ...
DOI:
10.1094/PDIS.1997.81.6.629

97. Effect of elevated carbon dioxide concentration and root restriction on net photosynthesis, water relations and foliar carbohydrate status of loblolly pine seedlings

Author:
Will, R.E.; Teskey, R.O.
Source:
Tree physiology 1997 v.17 no.10 pp. 655-661
ISSN:
0829-318X
Subject:
Pinus taeda; seedlings; roots; water stress; dose response; net assimilation rate; plant-water relations; conifer needles; starch; sugars; quantitative analysis; carbon dioxide; chemical constituents of plants; stress response
Abstract:
... To determine the effects of CO2-enriched air and root restriction on photosynthetic capacity, we measured net photosynthetic rates of 1-year-old loblolly pine seedlings grown in 0.6-, 3.8- or 18.9-liter pots in ambient (360 micromoles mol-1) or 2x ambient CO2 (720 micromoles mol-1) concentration for 23 weeks. We also measured needle carbohydrate concentration and water relations to determine wheth ...
DOI:
10.1093/treephys/17.10.655

98. Effect of habitat disturbance on inoculum potential of ericoid endophytes of Western Australian heaths (Epacridaceae)

Author:
Hutton, B.J.; Dixon, K.W.; Sivasithamparam, K.; Pate, J.S.
Source:
New phytologist 1997 v.135 no.4 pp. 739-744
ISSN:
0028-646X
Subject:
endophytes; root systems; spatial distribution; host plants; Ericaceae; inoculum density; hyphae; seedlings; soil microorganisms; topsoil; seasonal variation; population growth; mycorrhizae; disturbed soils; habitats; Western Australia
DOI:
10.1046/j.1469-8137.1997.00708.x

99. Effect of salinity on the growth and nitrogen uptake by wheat seedlings

Author:
Botella, M.A.; Martinez, V.; Nieves, M.; Cerda, A.
Source:
Journal of plant nutrition 1997 v.20 no.6 pp. 793-804
ISSN:
0190-4167
Subject:
root shoot ratio; calcium nitrate; salinity; phytotoxicity; seedlings; nutrient uptake; dry matter accumulation; Triticum aestivum; sodium chloride; ammonium sulfate; roots; shoots
Abstract:
... Saline conditions affect nitrogen (N) assimilation of higher plants. To study the effect of salinity and N source on growth and N uptake in wheat (Triticum aestivum L.), plants were grown in a growth chamber under controlled conditions. The nutrient solution contained 4 mM N, applied as either calcium nitrate [Ca(NO3)2] or ammonium sulfate [(NH4)2SO4], or a mixture of both, and the salinity treatm ...
DOI:
10.1080/01904169709365295

100. Effect of soil saturation duration and soil water content on root rot of maize caused by Pythium arrhenomanes

Author:
Yanar, Y.; Lipps, P.E.; Deep, I.W.
Source:
Plant disease 1997 v.81 no.5 pp. 475-480
ISSN:
0191-2917
Subject:
Zea mays; seedlings; Pythium; strains; soil water content; saturated conditions; duration; soil texture; shoots; roots; dry matter accumulation; hybrids; root rot
Abstract:
... Three aggressive isolates of P. arrhenomanes (201-25, 7E, and 5E) were used to evaluate the effect of soil saturation duration and soil water content on maize root rot. Maize seedlings grown in infested and noninfested soil:sand mixtures were subjected to saturation durations of 0, 6, 12, 24, or 40 h. Four silty-clay loam soil:sand mixtures (100:0, 80:20, 50:50, and 0:100) were used to evaluate th ...
DOI:
10.1094/PDIS.1997.81.5.475