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You searched for: Subject term dose response Remove constraint Subject term: dose response Subject term esters Remove constraint Subject term: esters Subject term Brassica napus Remove constraint Subject term: Brassica napus Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. 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 ...

2. Biological activity of optically pure C-1 altered abscisic acid analogs in Brassica napus microspore embryos

Author:
Hays, D.B.; Rose, P.; Abrams, S.R.; Moloney, M.M.
Source:
Journal of plant growth regulation 1996 v.15 no.1 pp. 5-11
ISSN:
0721-7595
Subject:
messenger RNA; germination; dose response; embryo (plant); aldehydes; isomers; gene expression; genes; esters; Brassica napus; mutants; abscisic acid; molecular conformation; alcohols
Abstract:
... We have examined the effects of stereochemically pure analogs of abscisic acid (ABA) on three responses in Brassica napus microspore embryos. The analogs used include modifications to natural (S-) (+)-ABA (=N-ABA) at the C-1 and C-1' positions. At the C-1 position, the carboxylic acid function was replaced with an alcohol, aldehyde, or methyl ester functional group, and at the chiral C-1' position ...
DOI:
10.1007/BF00213128