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You searched for: Journal name Plant physiology Remove constraint Journal name: Plant physiology Publication year rev 8001-1999 Remove constraint Publication year rev: 8001-1999 Source 1999 v.121 no.1 Remove constraint Source: 1999 v.121 no.1
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1. 1-Aminocyclopropane-1-carboxylate oxidase activity limits ethylene biosynthesis in Rumex palustris during submergence

Author:
Vriezen, W.H.; Hulzink, R.; Mariani, C.; Voesenek, L.A.C.J.
Source:
Plant physiology 1999 v.121 no.1 pp. 189-195
ISSN:
0032-0889
Subject:
messenger RNA; submergence; complementary DNA; aminocyclopropanecarboxylate oxidase; ethylene production; gene expression; oxygen; petioles; enzyme activity; Rumex; shoots
Abstract:
... Submergence strongly stimulates petiole elongation in Rumex palustris, and ethylene accumulation initiates and maintains this response in submerged tissues. cDNAs from R. palustris corresponding to a 1-aminocyclopropane-1-carboxylate (ACC) oxidase gene (RP-ACO1) were isolated from elongating petioles and used to study the expression of the corresponding gene. An increase in RP-ACO1 messenger was o ...
PubMed:
10482674
PubMed Central:
PMC59367

2. Arabidopsis mutants lacking the 43- and 54-kilodalton subunits of the chloroplast signal recognition particle have distinct phenotypes

Author:
Amin, P.; Sy, D.A.C.; Pilgrim, M.L.; Parry, D.H.; Nussaume, L.; Hoffman, N.E.
Source:
Plant physiology 1999 v.121 no.1 pp. 61-70
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; chlorophyll; alleles; loci; transposons; phenotype; mutation; biochemical pathways; codons; leaves; mutants; color; exons; introns; chloroplasts; plant proteins
Abstract:
... The chloroplast signal recognition particle (cpSRP) is a protein complex consisting of 54- and 43-kD subunits encoded by the fifty-four chloroplast, which encodes cpSRP54 (ffc), and chaos (cao) loci, respectively. Two new null alleles in the ffc locus have been identified. ffc1-1 is caused by a stop codon in exon 10, while ffc1-2 has a large DNA insertion in intron 8. ffc mutants have yellow first ...
PubMed:
10482661
PubMed Central:
PMC59390

3. Carbon and amino acids reciprocally modulate the expression of glutamine synthetase in Arabidopsis

Author:
Oliveira, I.C.; Coruzzi, G.M.
Source:
Plant physiology 1999 v.121 no.1 pp. 301-309
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; protein synthesis; messenger RNA; phytochrome; nitrogen; sucrose; enzyme activity; glutamate-ammonia ligase; transcription (genetics); gene expression; carbon; amino acids; chromosome mapping; reporter genes; chemical constituents of plants; multigene family; promoter regions; beta-glucuronidase; light
Abstract:
... In bacteria and yeast, glutamine synthetase (GS) expression is tightly regulated by the metabolic status of the cell, both at the transcriptional and posttranscriptional levels. We discuss the relative contributions of light and metabolic cues on the regulation of members of the GS gene family (chloroplastic GS2 and cytosolic GS1) in Arabidopsis. These studies reveal that the dramatic induction of ...
PubMed:
10482686
PubMed Central:
PMC59385

4. Chloroplast acclimation in leaves of Guzmania monostachia in response to high light

Author:
Maxwell, K.; Marrison, J.L.; Leech, R.M.; Griffiths, H.; Horton, P.
Source:
Plant physiology 1999 v.121 no.1 pp. 89-95
ISSN:
0032-0889
Subject:
ribulose-bisphosphate carboxylase; polypeptides; immunochemistry; protein content; thylakoids; light harvesting complex; Crassulacean acid metabolism; light intensity; acclimation; Guzmania; photosystem II; photosystem I; chemical constituents of plants; molecular weight; chlorophyll; leaves
Abstract:
... Acclimation of leaves to high light (HL; 650 micromol m(-2) s(-1)) was investigated in the long-lived epiphytic bromeliad Guzmania monostachia and compared with plants maintained under low light (LL; 50 micromol m(-2) s(-1)). Despite a 60% decrease in total chlorophyll in HL-grown plants, the chlorophyll a/b ratio remained stable. Additionally, chloroplasts from HL-grown plants had a much lower th ...
PubMed:
10482664
PubMed Central:
PMC59393

5. Developmental expression of violaxanthin de-epoxidase in leaves of tobacco growing under high and low light

Author:
Bugos, R.C.; Chang, S.H.; Yamamoto, H.Y.
Source:
Plant physiology 1999 v.121 no.1 pp. 207-213
ISSN:
0032-0889
Subject:
plant development; messenger RNA; enzymes; thylakoids; antheraxanthin; light intensity; leaf area; zeaxanthin; gene expression; Nicotiana tabacum; chlorophyll; violaxanthin; leaves
Abstract:
... Violaxanthin de-epoxidase (VDE) is a lumen-localized enzyme that catalyzes the de-epoxidation of violaxanthin in the thylakoid membrane upon formation of a transthylakoid pH gradient. We investigated the developmental expression of VDE in leaves of mature tobacco (Nicotiana tabacum) plants grown under high-light conditions (in the field) and low-light conditions (in a growth chamber). The differen ...
PubMed:
10482676
PubMed Central:
PMC59369

6. Differences in spatial expression between 14-3-3 isoforms in germinating barley embryos

Author:
Testerink, C.; Meulen, R.M. van der.; Oppedijk, B.J.; Boer, A.H. de.; Heimovaara-Dijkstra, S.; Kijne, J.W.; Wang, M.
Source:
Plant physiology 1999 v.121 no.1 pp. 81-87
ISSN:
0032-0889
Subject:
apical meristems; seed germination; imbibition; messenger RNA; protein synthesis; complementary DNA; Hordeum vulgare; immunohistochemistry; embryo (plant); isomers; gene expression; multigene family; plant proteins
Abstract:
... The family of 14-3-3 proteins is ubiquitous in eukaryotes and has been shown to exert an array of functions. We were interested in the possible role of 14-3-3 proteins in seed germination. Therefore, we studied the expression of 14-3-3 mRNA and protein in barley (Hordeum distichum L.) embryos during germination. With the use of specific cDNA probes and antibodies, we could detect individual expres ...
PubMed:
10482663
PubMed Central:
PMC59392

7. Elevation of the cytosolic free [Ca2+] is indispensable for the transduction of the nod factor signal in alfalfa

Author:
Felle, H.H.; Kondorosi, E.; Kondorosi, A.; Schultze, M.
Source:
Plant physiology 1999 v.121 no.1 pp. 273-279
ISSN:
0032-0889
Subject:
membrane potential; calcium; Medicago sativa; chlorides; cytosol; biochemical pathways; enzyme inhibitors; root hairs; plasma membrane; nodulation; oligosaccharides; adenosinetriphosphatase; inorganic ions
Abstract:
... In root hairs of alfalfa (Medicago sativa), the requirement of Ca(2+) for Nod factor signaling has been investigated by means of ion-selective microelectrodes. Measured 50 to 100 micrometers behind the growing tip, 0.1 micromolar NodRm-IV(C16:2,S) increased the cytosolic free [Ca(2+)] by about 0.2 pCa, while the same concentration of chitotetraose, the nonactive glucosamine backbone, had no effect ...
PubMed:
10482683
PubMed Central:
PMC59377

8. Gene-specific changes in alpha-tubulin transcript accumulation in developing cotton fibers

Author:
Whittaker, D.J.; Triplett, B.A.
Source:
Plant physiology 1999 v.121 no.1 pp. 181-188
ISSN:
0032-0889
Subject:
Gossypium hirsutum; tubulin; messenger RNA; cellulose; cell growth; multigene family; cell walls; isomers; hypocotyls; pollen; nucleotide sequences; amino acid sequences
Abstract:
... The fibers of cotton (Gossypium hirsutum) are single-cell trichomes that undergo rapid and synchronous elongation. Cortical microtubules provide spatial information necessary for the alignment of cellulose microfibrils that confine and regulate cell elongation. We used gene-specific probes to investigate alpha-tubulin transcript levels in elongating cotton fibers. Two discrete patterns of transcri ...
PubMed:
10482673
PubMed Central:
PMC59366

9. Hydrogen peroxide from the oxidative burst is neither necessary nor sufficient for hypersensitive cell death induction, phenylalanine ammonia lyase stimulation, salicylic acid accumulation, or scopoletin consumption in cultured tobacco cells treated with elicitin

Author:
Dorey, S.; Kopp, M.; Geoffroy, P.; Fritig, B.; Kauffmann, S.
Source:
Plant physiology 1999 v.121 no.1 pp. 163-171
ISSN:
0032-0889
Subject:
biosynthesis; phenylalanine ammonia-lyase; hydrogen peroxide; metabolites; biochemical pathways; hypersensitive response; cultured cells; Nicotiana tabacum; salicylic acid; oxidation; glycoproteins; apoptosis; defense mechanisms
Abstract:
... H2O2 from the oxidative burst, cell death, and defense responses such as the production ofphenylalanine ammonia lyase (PAL), salicylic acid (SA), and scopoletin were analyzed in cultured tobacco (Nicotiana tabacum) cells treated with three proteinaceous elicitors: two elicitins (alpha-megaspermin and beta-megaspermin) and one glycoprotein. These three proteins have been isolated from Phytophthora ...
PubMed:
10482671
PubMed Central:
PMC59364

10. Invertases. Primary structures, functions, and roles in plant development and sucrose partitioning

Author:
Sturm, A.
Source:
Plant physiology 1999 v.121 no.1 pp. 1-7
ISSN:
0032-0889
Subject:
beta-fructofuranosidase; chemical structure; plant development; sucrose; histochemistry; vacuoles; cytosol; enzyme activity; gene expression; cell differentiation; alkalinity; acidity; enzyme inhibitors; mechanical damage; pathogens; metabolism; osmoregulation; cell wall components; chemical constituents of plants
PubMed:
10482654
PubMed Central:
PMC1539224

11. Newly discovered plant c-myb-like genes rewrite the evolution of the plant myb gene family

Author:
Braun, E.L.; Grotewold, E.
Source:
Plant physiology 1999 v.121 no.1 pp. 21-24
ISSN:
0032-0889
Subject:
transcription factors; regulator genes; evolution; amino acid sequences; nucleotide sequences; DNA-binding domains; multigene family
PubMed:
10482656
PubMed Central:
PMC1539226

12. Oligogalacturonic acid and chitosan reduce stomatal aperture by inducing the evolution of reactive oxygen species from guard cells of tomato and Commelina communis

Author:
Lee, S.; Choi, H.; Suh, S.; Doo, I.S.; Oh, K.Y.; Choi, E.J.; Taylor, A.T.S.; Low, P.S.; Lee, Y.
Source:
Plant physiology 1999 v.121 no.1 pp. 147-152
ISSN:
0032-0889
Subject:
stomatal movement; guard cells; inorganic ions; interspecific variation; chemical reactions; Commelina communis; chitosan; catalase; chelating agents; defense mechanisms; hydrogen peroxide; calcium; ascorbic acid; cell wall components; stomata; light; oxygen; galacturonic acid; Solanum lycopersicum var. lycopersicum
Abstract:
... Stomatal opening provides access to inner leaf tissues for many plant pathogens, so narrowing stomatal apertures may be advantageous for plant defense. We investigated how guard cells respond to elicitors that can be generated from cell walls of plants or pathogens during pathogen infection. The effect of oligogalacturonic acid (OGA), a degradation product of the plant cell wall, and chitosan (bet ...
PubMed:
10482669
PubMed Central:
PMC59362

13. Spider mite-induced (3S)-(E)-nerolidol synthase activity in cucumber and lima bean. The first dedicated step in acyclic C11-homoterpene biosynthesis

Author:
Bouwmeester, H.J.; Verstappen, F.W.A.; Posthumus, M.A.; Dicke, M.
Source:
Plant physiology 1999 v.121 no.1 pp. 173-180
ISSN:
0032-0889
Subject:
interspecific variation; volatile compounds; sesquiterpenoids; Cucumis sativus; Phaseolus lunatus; biochemical pathways; ligases; mechanical damage; chemical constituents of plants; Tetranychus urticae; enzyme activity; leaves
Abstract:
... Many plant species respond to herbivory with de novo production of a mixture of volatiles that attracts carnivorous enemies of the herbivores. One of the major components in the blend of volatiles produced by many different plant species in response to herbivory by insects and spider mites is the homoterpene 4,8-dimethyl-1,3(E),7-nonatriene. One study (J. Donath, W. Boland [1995] Phytochemistry 39 ...
PubMed:
10482672
PubMed Central:
PMC59365

14. Starch and the control of kernel number in maize at low water potentials

Author:
Zinselmeier, C.; Jeong, B.R.; Boyer, J.S.
Source:
Plant physiology 1999 v.121 no.1 pp. 25-35
ISSN:
0032-0889
Subject:
Zea mays; starch; seed development; seed abortion; metabolites; enzyme activity; sucrose; stems; pollination; carbohydrate metabolism; isotope labeling; embryo (plant); beta-fructofuranosidase; seed productivity; water potential
Abstract:
... After reproduction is initiated in plants, subsequent reproductive development is sometimes interrupted, which decreases the final number of seeds and fruits. We subjected maize (Zea mays L.) to low water potentials (psi(w)) that frequently cause this kind of failure. We observed metabolite pools and enzyme activities in the developing ovaries while we manipulated the sugar stream by feeding sucro ...
PubMed:
10482657
PubMed Central:
PMC59374

15. Stress-induced legume root nodule senescence. Physiological, biochemical, and structural alterations

Author:
Matamoros, M.A.; Baird, L.M.; Escuredo, P.R.; Dalton, D.A.; Minchin, F.R.; Iturbe-Ormaetxe, I.; Rubio, M.C.; Moran, J.F.; Gordon, A.J.; Becana, M.
Source:
Plant physiology 1999 v.121 no.1 pp. 97-111
ISSN:
0032-0889
Subject:
nitrogenase; immunohistochemistry; ascorbate peroxidase; sucrose; nutrient availability; root nodules; metabolites; Phaseolus vulgaris; ultrastructure; peptides; oxygen; oxidation; chemical constituents of plants; Pisum sativum; enzyme activity; nitrates
Abstract:
... Nitrate-fed and dark-stressed bean (Phaseolus vulgaris) and pea (Pisum sativum) plants were used to study nodule senescence. In bean, 1 d of nitrate treatment caused a partially reversible decline in nitrogenase activity and an increase in O2 diffusion resistance, but minimal changes in carbon metabolites, antioxidants, and other biochemical parameters, indicating that the initial decrease in nitr ...
PubMed:
10482665
PubMed Central:
PMC59394

16. Sulfate is both a substrate and an activator of the voltage-dependent anion channel of Arabidopsis hypocotyl cells

Author:
Frachisse, J.M.; Thomine, S.; Colcombet, J.; Guern, J.; Barbier-Brygoo, H.
Source:
Plant physiology 1999 v.121 no.1 pp. 253-261
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; sulfates; hypocotyls; ion transport; anions; cells; cell membranes; cytosol; chlorides; nitrates; membrane permeability; malic acid; bicarbonates
Abstract:
... On the basis of the anion content of in vitro-cultured Arabidopsis plantlets, we explored the selectivity of the voltage-dependent anion channel of the plasma membrane of hypocotyl cells. In the whole-cell configuration, substitutionof cytosolic Cl(-) by different anions led to the following sequence of relative permeabilities: NO3(-) (2.6) > or = SO4(2-) (2.0) > Cl(-) (1.0) > HCO3(-) (0.8) >> mal ...
PubMed:
10482681
PubMed Central:
PMC59375

17. Tobacco O-methyltransferases involved in phenylpropanoid metabolism. The different caffeoyl-coenzyme A/5-hydroxyferuloyl-coenzyme A 3/5-O-methyltransferase and caffeic acid/5-O-hydroxyferulic acid 3/5-O-methyltransferase classes have distinct substrate specificities and expression patterns

Author:
Maury, S.; Geoffroy, P.; Legrand, M.
Source:
Plant physiology 1999 v.121 no.1 pp. 215-223
ISSN:
0032-0889
Subject:
Nicotiana tabacum; transferases; phenylpropanoids; biosynthesis; gene expression; methylation; Tobacco mosaic virus; leaves; isozymes; Escherichia coli; esters; biochemical pathways; lignin
Abstract:
... The biosynthesis of lignin monomers involves two methylation steps catalyzed by orthodiphenol-O-methyltransferases: caffeic acid/5-hydroxyferulic acid 3/5-O-methyltransferases (COMTs) and caffeoyl-coenzyme A (CoA)/5-hydroxyferuloyl-CoA 3/5-O-methyltransferases (CCoAOMTs). Two COMT classes (I and II) were already known to occur in tobacco (Nicotiana tabacum) and three distinct CCoAOMT classes have ...

18. The relationship between ethylene binding and dominant insensitivity conferred by mutant forms of the ETR1 ethylene receptor

Author:
Hall, A.E.; Chen, Q.G.; Findell, J.L.; Schaller, G.E.; Bleecker, A.B.
Source:
Plant physiology 1999 v.121 no.1 pp. 291-299
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; ethylene; alleles; hypocotyls; Saccharomyces cerevisiae; binding proteins; mutants; receptors; roots; gene dosage
Abstract:
... Ethylene responses in Arabidopsis are mediated by a small family of receptors, including the ETR1 gene product. Specific mutations in the N-terminal ethylene-binding domain of any family member lead to dominant ethylene insensitivity. To investigate the mechanism of ethylene insensitivity, we examined the effects of mutations on the ethylene-binding activity of the ETR1 protein expressed in yeast. ...
PubMed:
10482685
PubMed Central:
PMC59379

19. Antisense repression of hexokinase 1 leads to an overaccumulation of starch in leaves of transgenic potato plants but not to significant changes in tuber carbohydrate metabolism

Author:
Veramendi, J.; Roessner, U.; Renz, A.; Willmitzer, L.; Trethewey, R.N.
Source:
Plant physiology 1999 v.121 no.1 pp. 123-133
ISSN:
0032-0889
Subject:
genetic transformation; carbohydrate metabolism; messenger RNA; complementary DNA; hexokinase; antisense DNA; transgenic plants; glucose; Solanum tuberosum; starch; metabolites; cytosol; tubers; gene expression; crop yield; chemical constituents of plants; enzyme activity; leaves
Abstract:
... Potato (Solanum tuberosum L.) plants transformed with sense and antisense constructs of a cDNA encoding the potato hexokinase 1 (StHK1) exhibited altered enzyme activities and expression of StHK1 mRNA. Measurements of the maximum catalytic activity of hexokinase revealed a 22-fold variation in leaves (from 22% of the wild-type activity in antisense transformants to 485% activity in sense transform ...
PubMed:
10482667
PubMed Central:
PMC59360

20. Biochemical characterization of the suberization-associated anionic peroxidase of potato

Author:
Bernards, M.A.; Fleming, W.D.; Llewellyn, D.B.; Priefer, R.; Yang, X.; Sabatino, A.; Plourde, G.L.
Source:
Plant physiology 1999 v.121 no.1 pp. 135-145
ISSN:
0032-0889
Subject:
Solanum tuberosum; tubers; peroxidase; suberization; molecular weight; histochemistry; mechanical damage; isozymes; phenolic compounds; chemical constituents of plants
Abstract:
... The anionic peroxidase associated with the suberization response in potato (Solanum tuberosum L.) tubers during wound healing has been purified and partially characterized at the biochemical level. It is a 45-kD, class III (plant secretory) peroxidase that is localized tosuberizing tissues and shows a preference for feruloyl (o-methoxyphenol)-substituted substrates (order of substrate preference: ...
PubMed:
10482668
PubMed Central:
PMC59361