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You searched for: Journal name Plant physiology Remove constraint Journal name: Plant physiology Publication year rev 8002-1998 Remove constraint Publication year rev: 8002-1998 Source 1998 v.116 no.3 Remove constraint Source: 1998 v.116 no.3
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1. Contribution of malic enzyme, pyruvate kinase, phosphoenolpyruvate carboxylase, and the Krebs cycle to respiration and biosynthesis and to intracellular pH regulation during hypoxia in maize root tips observed by nuclear magnetic resonance imaging and gas chromatography-mass spectrometry

Author:
Edwards, S.; Nguyen, B.T.; Do, B.; Roberts, J.K.M.
Source:
Plant physiology 1998 v.116 no.3 pp. 1073-1081
ISSN:
0032-0889
Subject:
Zea mays; root tips; anaerobiosis; oxygen requirement; aerobic conditions; pyruvic acid; malic acid; biosynthesis; malic enzyme; pyruvate kinase; enzyme activity; chemical reactions; glucose 6-phosphate; alanine; glutamic acid; metabolites; isotopes; mitochondria; pH; nuclear magnetic resonance spectroscopy; gas chromatography; mass spectrometry; radiolabeling; stress response
Abstract:
... In vivo pyruvate synthesis by malic enzyme (ME) and pyruvate kinase and in vivo malate synthesis by phosphoenolpyruvate carboxylase and the Krebs cycle were measured by 13C incorporation from [1-13C]glucose into glucose-6-phosphate, alanine, glutamate, aspartate, and malate. These metabolites were isolated from maize (Zea mays L.) root tips under aerobic and hypoxic conditions. 13C-Nuclear magneti ...

2. Differential expression of a novel gene in response to coronatine, methyl jasmonate, and wounding in the Coi1 mutant of Arabidopsis

Author:
Benedetti, C.E.; Costa, C.L.; Turcinelli, S.R.; Arruda, P.
Source:
Plant physiology 1998 v.116 no.3 pp. 1037-1042
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; phytotoxins; plant pathogenic bacteria; jasmonic acid; genes; genetic code; gene expression; seedlings; leaves; flowers; roots; mutants; genetic variation; amino acid sequences; adenosine triphosphate; guanosine triphosphate; binding sites; stress response
Abstract:
... Coronatine is a phytotoxin produced by some plant-pathogenic bacteria. It has been shown that coronatine mimics the action of methyl jasmonate (MeJA) in plants. MeJA is a plant-signaling molecule involved in stress responses such as wounding and pathogen attack. In Arabidopsis thaliana, MeJA is essential for pollen grain development. The coi1 (for coronatine-insensitive) mutant of Arabidopsis, whi ...
PubMed:
9501136
PubMed Central:
PMC35073

3. Differential expression of the Arabidopsis Nia1 and Nia2 genes: cytokinin-induced nitrate reductase activity is correlated with increased Nia1 transcription and mRNA levels

Author:
Yu, X.; Sukumaran, S.; Marton, L.
Source:
Plant physiology 1998 v.116 no.3 pp. 1091-1096
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; messenger RNA; quantitative analysis; nitrate reductase; seedlings; transcription (genetics); gene expression; benzyladenine; genes; mutants; genetic variation; enzyme activity; leaves
Abstract:
... Nitrate reductase (NR) activity increased up to 14-fold in response to treatment of Arabidopsis thaliana seedlings with the cytokinin benzyladenine. NR induction was observed in seedlings germinated directly on cytokinin-containing medium, seedlings transferred to cytokinin medium, and seedlings grown in soil in which cytokinin was applied directly to the leaves. About the same level of induction ...

4. Energy sources for HCO3(-) and CO2 transport in air-grown cells of Synechococcus UTEX 625

Author:
Li, Q.; Canvin, D.T.
Source:
Plant physiology 1998 v.116 no.3 pp. 1125-1132
ISSN:
0032-0889
Subject:
Synechococcus; photosynthesis; carbon; nutrient transport; measurement; energy requirements; electrophysiology; electron transfer
Abstract:
... Light-dependent inorganic C (Ci) transport and accumulation in air-grown cells of Synechococcus UTEX 625 were examined with a mass spectrometer in the presence of inhibitors or artificial electron acceptors of photosynthesis in an attempt to drive CO2 or HCO3(-) uptake separately by the cyclic or linear electron transport chains. In the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea, the cell ...

5. Extending the microtubule/microfibril paradigm: Cellulose synthesis is required for normal cortical microtubule alignment in elongating cells

Author:
Fisher, D.D.; Cyr, R.J.
Source:
Plant physiology 1998 v.116 no.3 pp. 1043-1051
ISSN:
0032-0889
Subject:
cortex; protoplasts; cell wall components; biosynthesis; dose response; cell growth; tubulin; polymerization; developmental stages; cellulose; isoxaben; Nicotiana tabacum; microtubules; plasma membrane; cell suspension culture
Abstract:
... The cortical microtubule array provides spatial information to the cellulose-synthesizing machinery within the plasma membrane of elongating cells. Until now data indicated that information is transferred from organized cortical microtubules to the cellulose-synthesizing complex, which results in the deposition of ordered cellulosic walls. How cortical microtubules become aligned is unclear. The l ...

6. Fourier transform infrared microspectroscopy detects changes in protein secondary structure associated with desiccation tolerance in developing maize embryos

Author:
Wolkers, W.F.; Bochicchio, A.; Selvaggi, G.; Hoekstra, F.A.
Source:
Plant physiology 1998 v.116 no.3 pp. 1169-1177
ISSN:
0032-0889
Subject:
membrane permeability; viability; Zea mays; germination; sucrose; embryo (plant); developmental stages; raffinose; stachyose; infrared spectroscopy; plasma membrane; chemical structure; protein composition
Abstract:
... Isolated immature maize (Zea mays L.) embryos have been shown to acquire tolerance to rapid drying between 22 and 25 d after pollination (DAP) and to slow drying from 18 DAP onward. To investigate adaptations in protein profile in association with the acquisition of desiccation tolerance in isolated, immature maize embryos, we applied in situ Fourier transform infrared microspectroscopy. In fresh, ...

7. Heterogeneity and photoinhibition of photosystem II studied with thermoluminescence

Author:
Andree, S.; Weis, E.; Krieger, A.
Source:
Plant physiology 1998 v.116 no.3 pp. 1053-1061
ISSN:
0032-0889
Subject:
Spinacia oleracea; thylakoids; photosystem II; photoinhibition; measurement; temperature; diuron
Abstract:
... Thermoluminescence (TL) signals were recorded from grana stacks, margins, and stroma lamellae from fractionated, dark-adapted thylakoid membranes of spinach (Spinacia oleracea L.) in the absence and in the presence of 2,6-dichlorphenylindophenol (DCMU). In the absence of DCMU, the TL signal from grana fractions consisted of a homogenous B-band, which originatesfrom recombination of the semi-quinon ...

8. N-acylethanolamines: formation and molecular composition of a new class of plant lipids

Author:
Chapman, K.D.; Tripathy, S.; Venables, B.; DeSouza, A.D.
Source:
Plant physiology 1998 v.116 no.3 pp. 1163-1168
ISSN:
0032-0889
Subject:
amide hydrolases; biosynthesis; xylan; radiolabeling; G-proteins; ethanolamine; carboxylic ester hydrolases; microsomes; cultured cells; Nicotiana tabacum; hydrolysis; chemical constituents of plants; enzyme activity; phosphatidylethanolamines; measurement
Abstract:
... Recently, the biosynthesis of an unusual membrane phospholipid, N-acylphosphatidylethanolamine (NAPE), was found to increase in elicitor-treated tobacco (Nicotiana tabacum L.) cells (K.D. Chapman, A. Conyers-Hackson, R.A. Moreau, S. Tripathy [1995] Physiol Plant 95: 120-126). Here we report that before induction of NAPE biosynthesis, N-acylethanolamine (NAE) is released from NAPE in cultured tobac ...

9. Photoperiod control of gibberellin levels and flowering in sorghum

Author:
Lee, I.J.; Foster, K.R.; Morgan, P.W.
Source:
Plant physiology 1998 v.116 no.3 pp. 1003-1011
ISSN:
0032-0889
Subject:
Sorghum bicolor; flowering; gibberellins; quantitative analysis; diurnal variation; genetic variation; mutants; genotype
Abstract:
... Regulation of rhythmic peaks in levels of endogenous gibberellins (GAs) by photoperiod was studied in the short-day monocot sorghum (Sorghum bicolor [L.] Moench). Comparisons were made between three maturity (Ma) genotypes: 58M (Ma1Ma1, Ma2Ma2, phyB-1phyB-1, and Ma4Ma4 [a phytochrome B null mutant]); 90M (Ma1Ma1, Ma2Ma2, phyB-2phyB-2, and Ma4Ma4); and 100M (Ma1Ma1, Ma2Ma2, PHYBPHYB, and Ma4Ma4). P ...

10. Rearrangement of actin microfilaments in plant root hairs responding to Rhizobium etli nodulation signals

Author:
Cardenas, L.; Vidali, L.; Dominquez, J.; Perez, H.; Sanchez, F.; Hepler, P.K.; Quinto, C.
Source:
Plant physiology 1998 v.116 no.3 pp. 871-877
ISSN:
0032-0889
Subject:
fluorescein; symbiosis; developmental stages; actin; Phaseolus vulgaris; cytoskeleton; root hairs; Rhizobium; nodulation; fluorescence microscopy
Abstract:
... The response of the actin cytoskeleton to nodulation (Nod) factors secreted by Rhizobium etli has been studied in living root hairs of bean (Phaseolus vulgaris) that were microinjected with fluorescein isothiocyanate-phalloidin. In untreated control cells or cells treated with the inactive chitin oligomer, the actin cytoskeleton was organized into long bundles that were oriented parallel to the lo ...

11. Reduction of light-induced anthocyanin accumulation in inoculated sorghum mesocotyls: implications for a compensatory role in the defense response

Author:
Lo, S.C.C.; Nicholson, R.L.
Source:
Plant physiology 1998 v.116 no.3 pp. 979-989
ISSN:
0032-0889
Subject:
chemical reactions; glucosides; genes; etiolation; phenylalanine ammonia-lyase; cyanidin; gene expression; oxygenases; mesocotyls; defense mechanisms; naringenin-chalcone synthase; genetic code; transcription (genetics); pathogenesis-related proteins; enzyme activity; chemical structure; protein synthesis; biosynthesis; Bipolaris maydis; biochemical pathways; Sorghum bicolor; culture filtrates; light; phytoalexins
Abstract:
... Sorghum (Sorghum bicolor L. Moench) accumulates the anthocyanin cyanidin 3-dimalonyl glucoside in etiolated mesocotyls in response to light. Inoculation with the nonpathogenic fungus Cochliobolus heterostrophus drastically reduced the light-induced accumulation of anthocyanin by repressing the transcription of the anthocyanin biosynthesis genes encoding flavanone 3-hydroxylase, dihydroflavonol 4-r ...
PubMed:
9501130
PubMed Central:
PMC35099

12. Regulation of tomato fruit polygalacturonase mRNA accumulation by ethylene: a re-examination

Author:
Sitrit, Y.; Bennett, A.B.
Source:
Plant physiology 1998 v.116 no.3 pp. 1145-1150
ISSN:
0032-0889
Subject:
1-aminocyclopropane-1-carboxylic acid; Solanum lycopersicum var. lycopersicum; ripening; protein composition; pectins; metabolism; polygalacturonase; enzyme activity; ethylene; dose response; messenger RNA; gene expression; transgenic plants; antisense DNA
Abstract:
... Polygalacturonase (PG) is the major enzyme responsible for pectin disassembly in ripening fruit. Despite extensive research on the factors regulating PG gene expression in fruit, there is conflicting evidence regarding the role of ethylene in mediating its expression. Transgenic tomato (Lycopersicon esculentum) fruits in which endogenous ethylene production was suppressed by the expression of an a ...

13. Transdifferentiation of mature cortical cells to functional abscission cells in bean

Author:
McManus, M.T.; Thompson, D.S.; Merriman, C.; Lyne, L.; Osborne, D.J.
Source:
Plant physiology 1998 v.116 no.3 pp. 891-899
ISSN:
0032-0889
Subject:
cortex; ethylene; abscission; Golgi apparatus; developmental stages; explants; Phaseolus vulgaris; hydrolases; auxins; beta-glucans; cell differentiation; enzyme activity; isozymes; ultrastructure; leaves
Abstract:
... Abscission explants of bean (Phaseolus vulgaris L.) were treated with ethylene to induce cell separation at the primary abscission zone. After several days of further incubation of the remaining petiole in endogenously produced ethylene, the distal two-thirds of the petiole became senescent, and the remaining (proximal) portion stayed green. Cell-to-cell separation (secondary abscission) takes pla ...

14. Transit peptide mutations that impair in vitro and in vivo chloroplast protein import do not affect accumulation of the gamma-subunit of chloroplast ATPase

Author:
Kindle, K.L.; Lawrence, S.D.
Source:
Plant physiology 1998 v.116 no.3 pp. 1179-1190
ISSN:
0032-0889
Subject:
Chlamydomonas reinhardtii; chloroplasts; protein transport; adenosinetriphosphatase; enzyme activity; genetic code; genes; mutants; genetic variation; genetic transformation; transgenic plants; gene expression; nucleotide sequences
Abstract:
... We have begun to take a genetic approach to study chloroplast protein import in Chlamydomonas reinhardtii by creating deletions in the transit peptide of the gamma-subunit of chloroplast ATPase-coupling factor 1 (CF1-gamma encoded by AtpC) and testing their effects in vivo by transforming the altered genes into an atpC mutant and in vitro by importing mutant precursor into isolated C. reinhardtii ...
PubMed:
9501151
PubMed Central:
PMC35088

15. Xyloglucan octasaccharide XXLGol derived from the seeds of Hymenaea courbaril acts as signaling molecule

Author:
Vargas-Rechia, C.; Reicher, F.; Sierakowski, M.R.; Heyraud, A.; Driguez, H.; Lienart, Y.
Source:
Plant physiology 1998 v.116 no.3 pp. 1013-1021
ISSN:
0032-0889
Subject:
protoplasts; coleoptiles; biosynthesis; xyloglucans; gibberellic acid; Rubus plicatus; Humicola; beta-glucanase; Hymenaea courbaril; Triticum aestivum; culture filtrates; chemical constituents of plants; enzyme activity; 2,4-D; cell suspension culture
Abstract:
... Treatment of the xyloglucan isolated from the seeds of Hymenaea courbaril with Humicola insolens endo-1,4-,beta-D-glucanase I produced xyloglucan oligosaccharides, which were then isolated and characterized. The two most abundant compounds were the heptasaccharide (XXXG) and the octasaccharide (XXLG), which were examined by reference to the biological activity of other structurally related xyloglu ...

16. The chloroplast small heat-shock protein oligomer is not phosphorylated and does not dissociate during heat stress in vivo

Author:
Suzuki, T.; Krawitz, D.C.; Vierling, E.
Source:
Plant physiology 1998 v.116 no.3 pp. 1151-1161
ISSN:
0032-0889
Subject:
heat shock proteins; Arabidopsis thaliana; protein composition; stress response; cytosol; heat stress; leaves; phosphorylation; Pisum sativum; protein degradation; chloroplasts
Abstract:
... Plants synthesize several classes of small (15- to 30-kD monomer) heat-shock proteins (sHSPs) in response to heat stress, including a nuclear-encoded, chloroplast-localized sHSP (HSP21). Cytosolic sHSPs exist as large oligomers (approximately 200-800 kD) composed solely or primarily of sHSPs. Phosphorylation of mammalian sHSPs causes oligomer dissociation, which appears to be important for regulat ...
PubMed:
9501148
PubMed Central:
PMC35085

17. Biochemical characterization of stromal and thylakoid-bound isoforms of isoprene synthase in willow leaves

Author:
Wildermuth, M.C.; Fall, R.
Source:
Plant physiology 1998 v.116 no.3 pp. 1111-1123
ISSN:
0032-0889
Subject:
histidine; thylakoids; isoprenoids; arginine; Salix; leaves; light; emissions; enzyme activity; isozymes; cysteine; protein composition
Abstract:
... Isoprene synthase is the enzyme responsible for the foliar emission of the hydrocarbon isoprene (2-methyl-1,3-butadiene) from many C3 plants. Previously, thylakoid-bound and soluble forms of isoprene synthase had been isolated separately, each from different plant species using different procedures. Here we describe the isolation of thylakoid-bound and soluble isoprene synthases from a single will ...

18. Characterization of SKT1, an inwardly rectifying potassium channel from potato, by heterologous expressionin insect cells

Author:
Zimmermann, S.; Talke, In.; Ehrhardt, T.; Nast, G.; Muller-Rober, B.
Source:
Plant physiology 1998 v.116 no.3 pp. 879-890
ISSN:
0032-0889
Subject:
guard cells; developmental stages; Solanum tuberosum; ion transport; roots; dose response; fluorescence; cesium; gene expression; plasma membrane; leaves; Arabidopsis thaliana; messenger RNA; complementary DNA; genetic code; amino acid sequences; Spodoptera frugiperda; potassium; gene transfer; pH; nucleotide sequences; kinetics; membrane potential
Abstract:
... A cDNA encoding a novel, inwardly rectifying K+ (K+in) channel protein, SKT1, was cloned from potato (Solanum tuberosum L.). SKT1 is related to members of the AKT family of K+in channels previously identified in Arabidopsis thaliana and potato. Skt1 mRNA is most strongly expressed in leaf epidermal fragments and in roots. In electrophysiological, whole-cell, patch-clamp measurements performed on b ...
PubMed:
9501121
PubMed Central:
PMC35090

19. Controlled cytokinin production in transgenic tobacco using a copper-inducible promoter

Author:
McKenzie, M.J.; Mett, V.; Reynolds, P.H.S.; Jameson, P.E.
Source:
Plant physiology 1998 v.116 no.3 pp. 969-977
ISSN:
0032-0889
Subject:
promoter regions; plant development; buds; biosynthesis; phenotype; copper; transgenic plants; developmental stages; gene expression; apical dominance; cytokinins; Nicotiana tabacum; reporter genes; enzyme activity; plant morphology; roots; beta-glucuronidase; leaves; tissue culture
Abstract:
... The cytokinin group of plant hormones regulates aspects of plant growth and development, including the release of lateral buds from apical dominance and the delay of senescence. In this work the native promoter of a cytokinin synthase gene (ipt) was removed and replaced with a Cu-controllable promoter. Tobacco (Nicotiana tabacum L. cv tabacum) transformed with this Cu-inducible ipt gene (Cu-ipt) w ...

20. Epicuticular wax accumulation and fatty acid elongation activities are induced during leaf development of leeks

Author:
Rhee, Y.; Hlousek-Radojcic, A.; Ponsamuel, J.; Liu, D.; Post-Beittenmiller, D.
Source:
Plant physiology 1998 v.116 no.3 pp. 901-911
ISSN:
0032-0889
Subject:
Allium porrum; leaves; plant development; waxes; biosynthesis; quantitative analysis; developmental stages; microsomes; plastids; fatty acids; hydrolysis; hydrolases; enzyme activity; ultrastructure; chemical constituents of plants; fatty-acid synthase
Abstract:
... Epicuticular wax production was evaluated along the length of expanding leek (Allium porrum L.) leaves to gain insight into the regulation of wax production. Leaf segments from the bottom to the top were analyzed for (a) wax composition and load; (b) microsomal fatty acid elongase, plastidial fatty acid synthase, and acyl-acyl carrier protein (ACP) thioesterase activities; and (c) tissue and cellu ...