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