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You searched for: Journal name Plant physiology Remove constraint Journal name: Plant physiology Subject Nicotiana tabacum Remove constraint Subject: Nicotiana tabacum Subject term esters Remove constraint Subject term: esters Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
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1. Cell-free synthesis of pectin. Identification and partial characterization of polygalacturonate 4-alpha-galacturonosyltransferase and its products from membrane preparations of tobacco cell-suspension cultures

Author:
Doong, R.L.; Liljebjelke, K.; Fralish, G.; Kumar, A.; Mohnen, D.
Source:
Plant physiology 1995 v.109 no.1 pp. 141-152
ISSN:
0032-0889
Subject:
hexosyltransferases; radiolabeling; polygalacturonase; cell membranes; analytical methods; synthesis; Nicotiana tabacum; esters; cell wall components; galacturonic acid; pectins; bioassays; temperature; enzyme activity; esterification; pH; kinetics; cell suspension culture
Abstract:
... Polygalacturonate 4-alpha-galacturonosyltransferase (EC 2.4.1.43) activity has been identified in microsomal membranes isolated from tobacco (Nicotiana tabacum L. cv Samsun) cell-suspension cultures. Incubation of UDP-[14C]galacturonic acid with tobacco membranes results in a time-dependent incorporation of [14C]galacturonic acid into a chloroform-methanol-precipitable and 65% ethanol-insoluble pr ...

2. Importance of the chiral centers of jasmonic acid in the responses of plants. Activities and antagonism between natural and synthetic analogs

Author:
Holbrook, L.; Tung, P.; Ward, K.; Reid, D.M.; Abrams, S.; Lamb, N.; Quail, J.W.; Moloney, M.M.
Source:
Plant physiology 1997 v.114 no.2 pp. 419-428
ISSN:
0032-0889
Subject:
Helianthus annuus; Brassica napus; measurement; chemical degradation; dose response; jasmonic acid; gene expression; Triticum aestivum; Nicotiana tabacum; esters; stereochemistry; enzyme activity; chemical structure; seed germination; transgenic plants; cotyledons; proteinase inhibitors; reporter genes; chemical constituents of plants; chlorophyll; beta-glucuronidase
Abstract:
... The importance of the two chiral centers at C-3 and C-7 in the molecular structure of jasmonic acid in plant responses was investigated. We separated methyl jasmonate (MeJA) into (3R)- and (3S)-isomers with a fixed stereochemistry at C-3, but epimerization at C-7 is possible. The four isomers of the nonepimerizable analog 7-methyl MeJA were synthesized. These six esters and their corresponding aci ...

3. 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 ...