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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.118 no.4 Remove constraint Source: 1998 v.118 no.4
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1. 12-Oxophytodienoate-10,11-reductase: occurrence of two isoenzymes of different specificity against Stereoisomers of 12-oxophytodienoic acid

Author:
Schaller, F.; Hennig, P.; Weiler, E.W.
Source:
Plant physiology 1998 v.118 no.4 pp. 1345-1351
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; metabolism; stearic acid; oxidoreductases; Corydalis; Capnoides sempervirens; enzyme activity; isozymes; stereochemistry; metabolites
Abstract:
... The reduction of 12-oxophytodienoic acid (OPDA) to 3-oxo-2(2'[Z]-pentenyl)-cyclopentane-1-octanoic acid is catalyzed by 12-oxophytodienoate-10,11-reductase (OPR). Analysis of the isomer preference of OPR has indicated that the activity is composed of two isoenzymes exhibiting different stereoselectivities. The two isoforms of OPR have been separated, using protein extracts of Rock Harlequin (Coryd ...

2. 3-methylcrotonyl-coenzyme A carboxylase is a component of the mitochondrial leucine catabolic pathway in plants

Author:
Anderson, M.D.; Che, P.; Song, J.; Nikolau, B.J.; Wurtele, E.S.
Source:
Plant physiology 1998 v.118 no.4 pp. 1127-1138
ISSN:
0032-0889
Subject:
plant development; Glycine max; leucine; metabolism; seedlings; coenzyme A; cotyledons; metabolites; biochemical pathways; mitochondria; carboxy-lyases; hydrolysis; protein degradation; enzyme activity; protein composition
Abstract:
... 3-Methylcrotonyl-coenzyme A carboxylase (MCCase) is a mitochondrial biotin-containing enzyme whose metabolic function is not well understood in plants. In soybean (Glycine max) seedlings the organ-specific and developmentally induced changes in MCCase expression are regulated by mechanisms that control the accumulation of MCCase mRNA and the activity of the enzyme. During soybean cotyledon develop ...

3. Abscisic acid-dependent and -independent expression of the carrot late-embryogenesis-abundant-class gene Dc3 in transgenic tobacco seedlings

Author:
Siddiqui, N.U.; Chung, H.J.; Thomas, T.L.; Drew, M.C.
Source:
Plant physiology 1998 v.118 no.4 pp. 1181-1190
ISSN:
0032-0889
Subject:
genetic transformation; gene transfer; promoter regions; seedlings; Agrobacterium radiobacter; Daucus carota; transgenic plants; stress response; gene expression; histochemistry; Nicotiana tabacum; abscisic acid; enzyme activity; roots; beta-glucuronidase; shoots
Abstract:
... We studied the expression of three promoter 5' deletion constructs (-218, -599, and -1312) of the LEA (late embryogenesis abundant)-class gene Dc3 fused to beta-glucuronidase (GUS), where each construct value refers to the number of base pairs upstream of the transcription start site at which the deletion occurred. The Dc3 gene is noted for its induction by abscisic acid (ABA), but its response to ...

4. Benzothiadiazole-mediated induced resistance to Fusarium oxysporum f.sp. radicis-lycopersici in tomato

Author:
Benhamou, N.; Belanger, R.R.
Source:
Plant physiology 1998 v.118 no.4 pp. 1203-1212
ISSN:
0032-0889
Subject:
Solanum lycopersicum var. lycopersicum; Fusarium oxysporum f. sp. radicis-lycopersici; plant pathogenic fungi; disease resistance; azoles; roots; pathogenesis; developmental stages; pathogenicity
Abstract:
... Benzo-(1,2,3)-thiadiazole-7-carbothioic acid S-methyl ester (BTH), a synthetic chemical, was applied as a foliar spray to tomato (Lycopersicon esculentum) plants and evaluated for its potential to confer increased resistance against the soil-borne pathogen Fusarium oxysporum f. sp. radicis-lycopersici (FORL). In nontreated tomato plants all root tissues were massively colonized by FORL hyphae. Pat ...

5. Biosynthesis of camalexin from tryptophan pathway intermediates in cell-suspension cultures of Arabidopsis

Author:
Zook, M.
Source:
Plant physiology 1998 v.118 no.4 pp. 1389-1393
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; biosynthesis; tryptophan; biochemical pathways; plant pathogenic fungi; disease resistance; Bipolaris zeicola; cell suspension culture; phytoalexins
Abstract:
... Camalexin (3-thiazol-2'-yl-indole) is the principal phytoalexin that accumulates in Arabidopsis after infection by fungi or bacteria. Camalexin accumulation was detectable in Arabidopsis cell-suspension cultures 3 to 5 h after inoculation with Cochliobolus carbonum (Race 1), and then increased rapidly from 7 to 24 h after inoculation. Levels of radioactivity incorporated into camalexin during a 1. ...
PubMed:
9847113
PubMed Central:
PMC34755

6. Carbohydrates in individual cells of epidermis, mesophyll, and bundle sheath in barley leaves with changed export or photosynthetic rate

Author:
Koroleva, O.A.; Farrar, J.F.; Tomos, A.D.; Pollock, C.J.
Source:
Plant physiology 1998 v.118 no.4 pp. 1525-1532
ISSN:
0032-0889
Subject:
apical meristems; fructans; quantitative analysis; vascular bundles; Hordeum vulgare; glucose; sucrose; chemical constituents of plants; cooling; net assimilation rate; translocation (plant physiology); light; fructose; photosynthesis; mesophyll; roots; metabolites; shoots
Abstract:
... Carbohydrate metabolism of barley (Hordeum vulgare) leaves induced to accumulate sucrose (Suc) and fructans was investigated at the single-cell level using single-cell sampling and analysis. Cooling of the root and shoot apical meristem of barley plants led to the accumulation of Suc and fructan in leaf tissue. Suc and fructan accumulated in both mesophyll and parenchymatous bundle-sheath (PBS) ce ...

7. Characterization of a low-molecular-weight glutenin subunit gene from bread wheat and the corresponding protein that represents a major subunit of the glutenin polymer

Author:
Masci, S.; D'Ovidio, R.; Lafiandra, D.; Kasarda, D.D.
Source:
Plant physiology 1998 v.118 no.4 pp. 1147-1158
ISSN:
0032-0889
Subject:
viscoelasticity; glutenins; wheat flour; DNA; cysteine; amino acid sequences; genes; Triticum aestivum; food composition; protein composition
Abstract:
... Both high- and low-molecular-weight glutenin subunits (LMW-GS) play the major role in determining the viscoelastic properties of wheat (Triticum aestivum L.) flour. To date there has been no clear correspondence between the amino acid sequences of LMW-GS derived from DNA sequencing and those of actual LMW-GS present in the endosperm. We have characterized a particular LMW-GS from hexaploid bread w ...
PubMed:
9847089
PubMed Central:
PMC34731

8. Comparison of binding properties and early biological effects of elicitins in tobacco cells

Author:
Bourque, S.; Ponchet, M.; Binet, M.N.; Ricci, P.; Pugin, A.; Lebrun-Garcia, A.
Source:
Plant physiology 1998 v.118 no.4 pp. 1317-1326
ISSN:
0032-0889
Subject:
Nicotiana tabacum; cell suspension culture; protein composition; Phytophthora; plant pathogenic fungi; disease resistance; defense mechanisms; calcium; ion transport; alkalinity; plasma membrane; binding sites
Abstract:
... Elicitins are a family of small proteins secreted by Phytophthora species that have a high degree of homology and elicit defense reactions in tobacco (Nicotiana tabacum). They display acidic or basic characteristics, the acidic elicitins being less efficient in inducing plant necrosis. In this study we compared the binding properties of four elicitins (two basic and two acidic) and early-induced s ...

9. Comparison of the ability of partially N-acetylated chitosan and chitooligosaccharides to elicit resistance reactions in wheat leaves

Author:
Vander, P.; Varum, K.M.; Domard, A.; El-Gueddari, N.E.; Moerschbacher, B.M.
Source:
Plant physiology 1998 v.118 no.4 pp. 1353-1359
ISSN:
0032-0889
Subject:
Triticum aestivum; leaves; plant pathogenic fungi; pathogenicity; disease resistance; chitosan; dose response; oligosaccharides; lignin; biosynthesis; polymerization
Abstract:
... Chitin, a linear polysaccharide composed of (1 leads to 4)-linked 2-acetamido-2-deoxy-beta-D-glucopyranose (GlcNAc) residues, and chitosan, the fully or partially N-acetylated, water-soluble derivative of chitin composed of (1 leads to 4)-linked GlcNAc and 2-amino-2-deoxy-beta-D-glucopyranose (GlcN), have been proposed as elicitors of defense reactions in higher plants. We tested and compared the ...

10. Deepwater rice: a model plant to study stem elongation

Author:
Kende, H.; Knaap, E. van der.; Cho, H.T.
Source:
Plant physiology 1998 v.118 no.4 pp. 1105-1110
ISSN:
0032-0889
Subject:
Oryza sativa; internodes; leaves; cell cycle; gibberellic acid; gene expression; growth models; rice; flooded conditions

11. Developmental and environmental effects on the expression of the C3-C4 intermediate phenotype in Moricandia arvensis

Author:
Rylott, E.L.; Metzlaff, K.; Rawsthorne, S.
Source:
Plant physiology 1998 v.118 no.4 pp. 1277-1284
ISSN:
0032-0889
Subject:
carbon dioxide; phenotype; photorespiration; developmental stages; cotyledons; mitochondria; carboxy-lyases; light; glycine (amino acid); Moricandia arvensis; enzyme activity; leaves
Abstract:
... Cellular anatomy and expression of glycine decarboxylase (GDC) protein were studied during leaf development of the C3-C4 intermediate species Moricandia arvensis. Leaf anatomy was initially C3-like and the number and profile area of mitochondria in the bundle-sheath cells were the same as those in adjacent mesophyll cells. Between a leaf length of 6 and 12 mm there was a bundle-sheath-specific, 4- ...

12. Differential regulation of enolase during anaerobiosis in maize

Author:
Lal, S.K.; Lee, C.; Sachs, M.M.
Source:
Plant physiology 1998 v.118 no.4 pp. 1285-1293
ISSN:
0032-0889
Subject:
Zea mays; roots; anaerobiosis; protein composition; isozymes; enzyme activity; genes; gene expression; complementary DNA; clones; nucleotide sequences; amino acid sequences; transcription (genetics); stress response
Abstract:
... It was reported previously that enolase enzyme activity and ENO1 transcript levels are induced by anaerobic stress in maize (Zea mays). Here we show that not all isoforms of maize enolase are anaerobically induced. We cloned and sequenced a second enolase cDNA clone (pENO2) from maize. Sequence analysis showed that pENO2 shares 75.6% nucleotide and 89.5% deduced amino acid sequence identity with p ...
PubMed:
9847102
PubMed Central:
PMC34744

13. Differential responses of abaxial and adaxial guard cells of broad bean to abscisic acid and calcium

Author:
Wang, X.Q.; Wu, W.H.; Assmann, S.M.
Source:
Plant physiology 1998 v.118 no.4 pp. 1421-1429
ISSN:
0032-0889
Subject:
Vicia faba; leaves; guard cells; stomatal movement; abscisic acid; calcium; ion transport; potassium; membrane potential
Abstract:
... Regulation by abscisic acid (ABA) and Ca2+ of broad bean (Vicia faba) abaxial and adaxial guard cell movements and inward K+ currents were compared. One millimolar Ca2+ in the bathing medium inhibited abaxial stomatal opening by 60% but only inhibited adaxial stomatal opening by 15%. The addition of 1 micromolar ABA in the bathing medium resulted in 80% inhibition of abaxial but only 45% inhibitio ...

14. Expression analysis of a ripening-specific, auxin-repressed endo-1,4-beta-glucanase gene in strawberry

Author:
Harpster, M.H.; Brummell, D.A.; Dunsmuir, P.
Source:
Plant physiology 1998 v.118 no.4 pp. 1307-1316
ISSN:
0032-0889
Subject:
Fragaria ananassa; Solanum lycopersicum var. lycopersicum; ripening; genes; gene expression; genetic code; beta-glucanase; enzyme activity; stems; leaves; flowers; roots; enzyme inhibitors; auxins; amino acid sequences
Abstract:
... A cDNA (Cel1) encoding an endo-1,4-beta-glucanase (EGase) was isolated from ripe fruit of strawberry (Fragaria x ananassa). The deduced protein of 496 amino acids contains a presumptive signal sequence, a common feature of cell wall-localized EGases, and one potential N-glycosylation site. Southern-blot analysis of genomic DNA from F. x ananassa, an octoploid species, and that from the diploid spe ...
PubMed:
9847104
PubMed Central:
PMC34746

15. Expression of beta-amylase from alfalfa taproots

Author:
Gana, J.A.; Kalengamaliro, N.E.; Cunningham, S.M.; Volenec, J.J.
Source:
Plant physiology 1998 v.118 no.4 pp. 1495-1505
ISSN:
0032-0889
Subject:
Medicago sativa; roots; cell suspension culture; starch; biosynthesis; metabolites; mannitol; sucrose; beta-amylase; enzyme activity; complementary DNA; genes; gene expression; genetic code; amino acid sequences; messenger RNA; quantitative analysis; seasonal variation; transcription (genetics)
Abstract:
... Alfalfa (Medicago sativa L.) roots contain large quantities of beta-amylase, but little is known about its role in vivo. We studied this by isolating a beta-amylase cDNA and by examining signals that affect its expression. The beta-amylase cDNA encoded a 55.95-kD polypeptide with a deduced amino acid sequence showing high similarity to other plant beta-amylases. Starch concentrations, beta-amylase ...
PubMed:
9847126
PubMed Central:
PMC34768

16. Inhibition of auxin movement from the shoot into the root inhibits lateral root development in Arabidopsis

Author:
Reed, R.C.; Brady, S.R.; Muday, G.K.
Source:
Plant physiology 1998 v.118 no.4 pp. 1369-1378
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; roots; plant development; shoots; light; translocation (plant physiology); indole acetic acid
Abstract:
... In roots two distinct polar movements of auxin have been reported that may control different developmental and growth events. To test the hypothesis that auxin derived from the shoot and transported toward the root controls lateral root development, the two polarities of auxin transport were uncoupled in Arabidopsis. Local application of the auxin-transport inhibitor naphthylphthalamic acid (NPA) ...
PubMed:
9847111
PubMed Central:
PMC34753

17. Meristem-specific suppression of mitosis and a global switch in gene expression in the root cap of pea by endogenous signals

Author:
Brigham, L.A.; Woo, H.H.; Wen, F.; Hawes, M.C.
Source:
Plant physiology 1998 v.118 no.4 pp. 1223-1231
ISSN:
0032-0889
Subject:
apical meristems; mitosis; cell differentiation; cell growth; developmental stages; gene expression; Pisum sativum
Abstract:
... Two functionally distinct sets of meristematic cells exist within root tips of pea (Pisum sativum): the root apical meristem, which gives rise to the body of the root; and the root cap meristem, which gives rise to cells that differentiate progressively through the cap and separate ultimately from its periphery as border cells. When a specific number of border cells has accumulated on the root cap ...

18. Methyl jasmonate induces lauric acid omega-hydroxylase activity and accumulation of CYP94A1 transcripts but does not affect epoxide hydrolase activities in Vicia sativa seedlings

Author:
Pinot, F.; Benveniste, I.; Salaun, J.P.; Durst, F.
Source:
Plant physiology 1998 v.118 no.4 pp. 1481-1486
ISSN:
0032-0889
Subject:
Vicia sativa; seedlings; cytochrome P-450; stearic acid; hydrolysis; dodecanoic acid; oxygenases; epoxide hydrolase; enzyme activity; jasmonic acid; dose response; chemical constituents of plants; transcription (genetics); etiolation
Abstract:
... Treatment of etiolated Vicia sativa seedlings by the plant hormone methyl jasmonate (MetJA) led to an increase of cytochrome P450 content. Seedlings that were treated for 48 h in a 1 mM solution of MetJA stimulated omega-hydroxylation of 12:0 (lauric acid) 14-fold compared with the control (153 versus 11 pmol min(-1) mg(-1) protein, respectively). Induction was dose dependent. The increase of acti ...

19. NPH4, a conditional modulator of auxin-dependent differential growth responses in Arabidopsis

Author:
Stowe-Evans, E.L.; Harper, R.M.; Motchoulski, A.V.; Liscum, E.
Source:
Plant physiology 1998 v.118 no.4 pp. 1265-1275
ISSN:
0032-0889
Subject:
Arabidopsis thaliana; apical meristems; dose response; hypocotyls; gravitropism; developmental stages; genetic variation; gene expression; auxins; gravity; mutants; genotype; phototropism; measurement; plant morphology; leaves; plant proteins
Abstract:
... Although sessile in nature, plants are able to use a number of mechanisms to modify their morphology in response to changingenvironmental conditions. Differential growth is one such mechanism. Despite its importance in plant development, little is known about the molecular events regulating the establishment of differential growth. Here we report analyses of the nph4 (nonphototropic hypocotyl) mut ...
PubMed:
9847100
PubMed Central:
PMC34742

20. Phytochrome regulates gibberellin biosynthesis during germination of photoblastic lettuce seeds

Author:
Toyomasu, T.; Kawaide, H.; Mitsuhashi, W.; Inoue, Y.; Kamiya, Y.
Source:
Plant physiology 1998 v.118 no.4 pp. 1517-1523
ISSN:
0032-0889
Subject:
Lactuca sativa; seed germination; gibberellins; biosynthesis; chemical reactions; biochemical pathways; oxidoreductases; hydrolases; enzyme activity; phytochrome; red light; far-red light; complementary DNA; genetic code; reverse transcription; gene transfer; Escherichia coli; gene expression; messenger RNA; amino acid sequences; clones; genetic variation
Abstract:
... Germination of lettuce (Lactuca sativa L.) seed is regulated by phytochrome. The requirement for red light is circumvented by the application of gibberellin (GA). We have previously shown that the endogenous content of GA1, the main bioactive GA in lettuce seeds, increases after red-light treatment. To clarify which step of GA1 synthesis is regulated by phytochrome, cDNAs encoding GA 20-oxidases ( ...
PubMed:
9847128
PubMed Central:
PMC34770