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You searched for: Journal name Plant physiology Remove constraint Journal name: Plant physiology Publication year rev 8005-1995 Remove constraint Publication year rev: 8005-1995 Source 1995 v.108 no.4 Remove constraint Source: 1995 v.108 no.4
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1. Apomixis: molecular strategies for the generation of genetically identical seeds without fertilization

Author:
Koltunow, A.M.; Bicknell, R.A.; Chaudhury, A.M.
Source:
Plant physiology 1995 v.108 no.4 pp. 1345-1352
ISSN:
0032-0889
Subject:
cultivars; Arabidopsis; mutagenesis; Hieracium; apomixis; genetic engineering

2. Carbon partitioning in eelgrass: regulation by photosynthesis and the response to daily light-dark cycles

Author:
Zimmerman, R.C.; Kohrs, D.G.; Steller, D.L.; Alberte, R.S.
Source:
Plant physiology 1995 v.108 no.4 pp. 1665-1671
ISSN:
0032-0889
Subject:
source-sink relationships; sucrose-phosphate synthase; nutrient transport; plant nutrition; sucrose; net assimilation rate; biochemical pathways; Zostera marina; carbon; diurnal variation; leaves; light; photoperiod; enzyme activity; hypoxia; sucrose synthase
Abstract:
... Diel variations in rates of C export, sucrose-phosphate synthase (SPS) and sucrose synthase (SS) activity, and C reserves were investigated in Zostera marina L. (eelgrass) to elucidate the environmental regulation of sucrose formation and partitioning in this ecologically important species. Rates of C flux and SPS activity increased with leaf age, consistent with the ontogenic transition from sink ...

3. Differential solute regulation in leaf blades of various ages in salt-sensitive wheat and a salt-tolerant wheat X lophopyrum elongatum (Host) A. Love amphiploid

Author:
Colmer, T.D.; Epstein, E.; Dvorak, J.
Source:
Plant physiology 1995 v.108 no.4 pp. 1715-1724
ISSN:
0032-0889
Subject:
seedlings; osmotic pressure; spatial distribution; sap; betaine; allopolyploidy; intergeneric hybridization; glucose; proline; solutes; Triticum aestivum; sodium; leaves; plant nutrition; sucrose; potassium; Thinopyrum elongatum; sodium chloride; water content; salt tolerance; asparagine; salinity; osmoregulation
Abstract:
... Leaf blades of different ages from a salt-tolerant wheat X Lophopyrum elongatum (Host) A. Love (syn. Agropyron elongatum Host) amphiploid and its salt-sensitive wheat parent (Triticum aestivum L. cv Chinese Spring) were compared for their ionic relations, organic solute accumulation, and sap osmotic potential. The plants were grown for 18 d in nonsaline (1.25 mM Na+) and salinized (200 mM NaCl) nu ...

4. Diurnal regulation of leaf blade elongation in rice by CO2: is it related to sucrose-phosphate synthase activity?

Author:
Seneweera, S.P.; Basra, A.S.; Barlow, E.W.; Conroy, J.P.
Source:
Plant physiology 1995 v.108 no.4 pp. 1471-1477
ISSN:
0032-0889
Subject:
Oryza sativa; hexosyltransferases; leaves; leaf area; developmental stages; carbon dioxide; enzyme activity; diurnal variation; circadian rhythm; source-sink relationships; dry matter accumulation; tillering; carbohydrates
Abstract:
... The relationship between leaf blade elongation rates (LER) and sucrose-phosphate synthase (SPS) activity was investigated at different times during ontogeny of rice (Oryza sativa L. cv Jarrah) grown in flooded soil at either 350 or 700 microliter CO2 L-1. High CO2 concentrations increased LER of expanding blades and in vivo activity (V(limiting)) SPS activity of expanded blades during the early ve ...

5. End-product control of carbon metabolism in culture-grown sugar beet plants: molecular and physiological evidence on accelerated leaf development and enhanced gene expression

Author:
Kovtun, Y.; Daie, J.
Source:
Plant physiology 1995 v.108 no.4 pp. 1647-1656
ISSN:
0032-0889
Subject:
ribulose-bisphosphate carboxylase; source-sink relationships; plant development; sucrose-phosphate synthase; plant nutrition; glucose; sucrose; nutrient availability; fructose-bisphosphatase; nutrient uptake; translocation (plant physiology); gene expression; leaves; soilless culture; enzyme activity; culture media; Beta vulgaris
Abstract:
... Sugar beet (Beta vulgaris L.) seedlings were grown on media containing 90 to 300 mM sucrose or glucose. Compared to controls, sugar-grown plants had higher growth rate, photosynthesis, and leaf sugar levels. The steady-state level of transcripts increased significantly for the small subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco)(rbcS) and the cytosolic fructose-1,6-bisphospha ...

6. Flowering responses to altered expression of phytochrome in mutants and transgenic lines of arabidopsis thaliana (L.) Heynh

Author:
Bagnall, D.J.; King, R.W.; Whitelam, G.C.; Boylan, M.T.; Wagner, D.; Quail, P.H.
Source:
Plant physiology 1995 v.108 no.4 pp. 1495-1503
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; far-red light; flowering; line differences; hypocotyls; transgenic plants; leaf area; height; gene expression; duration; fluorescent lighting; mutants; red light; photoperiod; phytochrome; leaves
Abstract:
... The long-day plant Arabidopsis thaliana (L.) Heynh. flowers early in response to brief end-of-day (EOD) exposures to far-red light (FR) following a fluorescent short day of 8 h. FR promotion of flowering was nullified by subsequent brief red light (R) EOD exposure, indicating phytochrome involvement. The EOD response to R or FR is a robust measure of phytochrome action. Along with their wild-type ...
PubMed:
7659750
PubMed Central:
PMC157529

7. Fractionation of xyloglucan fragments and their interaction with cellulose

Author:
Vincken, J.P.; Keizer, A. de.; Beldman, G.; Voragen, A.G.J.
Source:
Plant physiology 1995 v.108 no.4 pp. 1579-1585
ISSN:
0032-0889
Subject:
fractionation; Tamarindus; xyloglucans; cellulases; chemical analysis; cellulose; oligosaccharides; sorption isotherms; degradation; molecular conformation; adsorption
Abstract:
... Tamarind seed xyloglucan was partially degraded with a purified endoglucanase (endoV) from Trichoderma viride. Analysis by high-performance anion-exchange chromatography showed that this digest was composed of fragments consisting of 1 to 10 repeating oligosaccharide units ([xg]1-[xg]10). To study the adsorption of xyloglucan fragments to cellulose in detail, this digest was fractionated on BioGel ...
PubMed:
7659752
PubMed Central:
PMC157538

8. Heat shock disrupts cap and poly(A) tail function during translation and increases mRNA stability of introduced reporter mRNA

Author:
Gallie, D.R.; Caldwell, C.; Pitto, L.
Source:
Plant physiology 1995 v.108 no.4 pp. 1703-1713
ISSN:
0032-0889
Subject:
protoplasts; messenger RNA; protein synthesis; structural genes; enzyme activity; Daucus carota; luciferase; heat stress; duration; binding sites; reporter genes; Chinese hamsters; half life; electroporation
Abstract:
... The effect of heat shock on translational efficiency and message stability of a reporter mRNA was examined in carrot (Daucus carota). Heat shock of short duration resulted in an increase in protein yield, whereas repression was observed following extended exposure to the stress. Regardless of the duration of the heat shock, a loss in the function of the 5' cap [m7G(5')ppp(5')N, where N represents ...

9. Identification of NADPH: protochlorophyllide oxidoreductases A and B: a branched pathway for light-dependent chlorophyll biosynthesis in Arabidopsis thaliana

Author:
Armstrong, G.A.; Runge, S.; Frick, G.; Sperling, U.; Apel, K.
Source:
Plant physiology 1995 v.108 no.4 pp. 1505-1517
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; sequence analysis; polypeptides; plant development; biosynthesis; structural genes; dark adaptation; oxidoreductases; gene expression; chlorophyll; protochlorophyllides; light
Abstract:
... Illumination releases the arrest in chlorophyll (Chl) biosynthesis in etiolated angiosperm seedlings through the enzymatic photoreduction of protochlorophyllide (Pchlide) to chlorophyllide (Chlide), the first light-dependent step in chloroplast biogenesis. NADPH:Pchlide oxidoreductase (POR, EC 1.3.1.33), a nuclear-encoded plastic-localized enzyme, mediates this unique photoreduction. Paradoxically ...
PubMed:
7659751
PubMed Central:
PMC157530

10. In vivo regulatory phosphorylation of soybean nodule phosphoenolpyruvate carboxylase

Author:
Zhang, X.Q.; Li, B.; Chollet, R.
Source:
Plant physiology 1995 v.108 no.4 pp. 1561-1568
ISSN:
0032-0889
Subject:
Bradyrhizobium japonicum; Glycine max; root nodules; nodulation; dark adaptation; light; stems; pretreatment; cytosol; phosphoenolpyruvate carboxylase; enzyme activity; malic acid; phosphorylation; serine; photosynthates
Abstract:
... In this report we provide evidence that cytosolic phosphoenolpyruvate carboxylase (PEPC) in soybean (Glycine max L.) root nodules is regulated in vivo by a seryl-phosphorylation cycle, as with the C4, Crassulacean acid metabolism, and C3 leaf isoforms. Pretreatment of parent plants by stem girdling for 5 or 14 h caused a significant decrease in the apparent phosphorylation state of nodule PEPC, as ...

11. Influence of elevated fructose-2,6-bisphosphate levels on starch mobilization in transgenic tobacco leaves in the dark

Author:
Scott, P.; Kruger, N.J.
Source:
Plant physiology 1995 v.108 no.4 pp. 1569-1577
ISSN:
0032-0889
Subject:
plant nutrition; Nicotiana tabacum; transgenic plants; line differences; leaves; sugar phosphates; enzyme activity; starch; biosynthesis; light; degradation; carbohydrate metabolism; metabolites; biochemical pathways
Abstract:
... The aim of this work was to study the effect of elevated fructose-2,6-bisphosphate (Fru-2,6-bisP) levels on carbohydrate metabolism in leaves in the dark. In transgenic tobacco (Nicotiana tabacum L.) lines containing mammalian 6-phosphofructo-2-kinase activity there is an inverse relationship between the level of Fru-2,6-bisP in leaves and the rate of starch breakdown in the dark. Estimates of the ...

12. Isolation and characterization of a protein associated with carotene globules in the alga Dunaliella bardawil

Author:
Katz, A.; Jimenez, C.; Pick, U.
Source:
Plant physiology 1995 v.108 no.4 pp. 1657-1664
ISSN:
0032-0889
Subject:
Dunaliella; beta-carotene; light intensity; photoperiod; lipid bodies; protein content; amino acid sequences; polypeptides; molecular weight; chloroplasts; ultrastructure; proteolysis; genotype
Abstract:
... The halotolerant alga Dunaliella bardawil accumulates very large amounts of beta-carotene when exposed to high light intensity. The accumulated beta-carotene is concentrated in small, oily globules within the chloroplast and has been suggested to protect the alga against photodamage by high irradiation (A. Ben-Amotz, A. Katz, M. Avron [1982] J Phycol 18: 529-537; A. Ben-Amotz, M. Avron [1983] Plan ...

13. Lipo-chitooligosaccharides nodulation signals from Rhizobium meliloti induce their rapid degradation by the host plant alfalfa

Author:
Staehelin, C.; Schultze, M.; Kondorosi, E.; Kondorosi, A.
Source:
Plant physiology 1995 v.108 no.4 pp. 1607-1614
ISSN:
0032-0889
Subject:
chemical degradation; Medicago sativa; Ensifer meliloti; inactivation; root nodules; hydrolases; pretreatment; mutants; Rhizobium; nodulation; enzyme activity; oligosaccharides; glycoproteins; chitin
Abstract:
... Extracellular enzymes from alfalfa (Medicago sativa L.) involved in the degradation of nodulation (Nod) factors could be distinguished by their different cleavage specificities and were separated by lectin affinity chromatography. A particular glycoprotein was able to release an acylated lipo-disaccharide from all tested Nod factors having an oligosaccharide chain length of four or five residues. ...

14. Localization and characterization of peroxidases in the mitochondria of chilling-acclimated maize seedlings

Author:
Prasad, T.K.; Anderson, M.D.; Stewart, C.R.
Source:
Plant physiology 1995 v.108 no.4 pp. 1597-1605
ISSN:
0032-0889
Subject:
Zea mays; peroxidases; mitochondria; guaiacol; cytochrome c; enzyme activity; glycoproteins; trypsin; enzyme inhibitors; cooling; acclimation; membrane proteins
Abstract:
... We present evidence of two peroxidases in maize (Zea mays L.) mitochondria. One of these uses guaiacol and the other uses cytochrome c as the electron donor. Treatments of fresh mitochondria with protease(s) indicate that ascorbate and glutathione peroxidases are likely bound to the mitochondria as cytosolic contaminants, whereas guaiacol and cytochrome peroxidases are localized within the mitocho ...

15. Mitochondrial pyruvate dehydrogenase: molecular cloning of the E1 alpha subunit and expression analysis

Author:
Grof, C.P.L.; Winning, B.M.; Scaysbrook, T.P.; Hill, S.A.; Leaver, C.J.
Source:
Plant physiology 1995 v.108 no.4 pp. 1623-1629
ISSN:
0032-0889
Subject:
sequence analysis; seedling growth; structural genes; pyruvate dehydrogenase (lipoamide); Cucumis sativus; complementary DNA; protein subunits; Solanum tuberosum; clones; amino acid sequences; gene expression; transcription (genetics); mitochondria; nucleotide sequences; enzyme activity; nucleic acid hybridization
Abstract:
... A polymerase chain reaction-based approach was used to isolate cDNA clones encoding the E1 alpha subunit of the mitochondrial pyruvate dehydrogenase from higher plants. Putative full-length clones were identified on the basis of similarity to E1 alpha sequences from nonplant sources. Southern blot analysis revealed a small family of genes in potato (Solanum tuberosum L.), whereas in cucumber (Cucu ...
PubMed:
7659754
PubMed Central:
PMC157543

16. Molecular and physiological analysis of a thylakoid K+ channel protein

Author:
Fang, Z.; Mi, F.; Berkowitz, G.A.
Source:
Plant physiology 1995 v.108 no.4 pp. 1725-1734
ISSN:
0032-0889
Subject:
thylakoids; Spinacia oleracea; potassium; ion transport; fractionation; photosynthesis; solubilization; molecular weight; immunologic techniques; polypeptides; membrane proteins; electron transfer
Abstract:
... Transport studies identified a K+ channel protein in preparations of purified spinach (Spinacea oleracea) thylakoid membrane. This protein was solubilized from native membranes and reconstituted into artificial proteoliposomes with maintenance of functional integrity A 33-kD thylakoid polypeptide was identified as a putative component of this thylakoid protein. This identification was made using a ...

17. Nonaqueous fractionation to assess the ionic composition of the apoplast during fruit ripening

Author:
MacDougall, A.J.; Parker, R.; Selvendran, R.R.
Source:
Plant physiology 1995 v.108 no.4 pp. 1679-1689
ISSN:
0032-0889
Subject:
Solanum pimpinellifolium; ripening; cell walls; pericarp; fractionation; organic acids and salts; magnesium; uronic acids; malate dehydrogenase; mannosidases; esterification; calcium; pH; pectins
Abstract:
... We have examined the possibility that pectin solubilization and cell separation in fruit may be due to organic acids disrupting calcium bridges between pectic polysaccharides. With fruit from a wild tomato (lycopersicon pimpinellifolium [Dunal]) we demonstrated the validity of a nonaqueous fractionation method to obtain reliable estimates of the ionic content of the apoplast. In unripe fruit no or ...

18. Overexpression of delta 1-pyrroline-5-carboxylate synthetase increases proline production and confers osmotolerance in transgenic plants

Author:
Kavi Kishor, P.B.; Hong, Z.; Miao, G.H.; Hu, C.A.; Verma, D.P.S.
Source:
Plant physiology 1995 v.108 no.4 pp. 1387-1394
ISSN:
0032-0889
Subject:
salt tolerance; genetic transformation; gene transfer; flowering; biosynthesis; structural genes; salinity; transgenic plants; water deprivation; drought tolerance; proline; osmotic pressure; gene expression; oxidoreductases; Nicotiana tabacum; osmoregulation; biomass production; enzyme activity
Abstract:
... Proline (Pro) accumulation has been correlated with tolerance to drought and salinity stresses in plants. Therefore, overproduction of Pro in plants may lead to increased tolerance against these abiotic stresses. To test this possibility, we overexpressed in tobacco the mothbean delta 1-pyrroline-5-carboxylate synthetase, a bifunctional enzyme able to catalyze the conversion of glutamate to delta ...

19. Plant defensins: novel antimicrobial peptides as components of the host defense system

Author:
Broekaert, W.F.; Terras, F.R.G.; Cammue, B.P.A.; Osborn, R.W.
Source:
Plant physiology 1995 v.108 no.4 pp. 1353-1358
ISSN:
0032-0889
Subject:
antibacterial properties; seeds; sequence alignment; transgenic plants; antifungal properties; peptides; amino acid sequences; gene expression; genes; growth retardation; disease resistance; DNA conformation; insects; defense mechanisms
PubMed:
7659744
PubMed Central:
PMC157512

20. Pollination-induced ethylene in carnation: role of pollen tube growth and sexual compatibility

Author:
Larsen, P.B.; Ashworth, E.N.; Jones, M.L.; Woodson, W.R.
Source:
Plant physiology 1995 v.108 no.4 pp. 1405-1412
ISSN:
0032-0889
Subject:
1-aminocyclopropane-1-carboxylic acid; corolla; ethylene production; clones; pollen tubes; Dianthus caryophyllus; cross pollination
Abstract:
... The pollen-pistil interactions that result in the stimulation of ethylene production and petal senescence in carnation (Dianthus caryophyllus L.) flowers were investigated. Pollination of White Sim flowers with Starlight pollen elicited an increasein ethylene production by styles, leading to increased petal ethylene and premature petal senescence. In contrast, pollination with 87-29G pollen led to ...