Investigation into the mechanism of isoxaben tolerance in dicot weeds

Isoxaben is an inhibitor of the synthesis of cellulose from glucose. Some dicot weed species are relatively insensitive to isoxaben inhibition. This study investigates mechanisms by which decreased sensitivity may occur in three dicot weed species: catchweed bedstraw, redroot pigweed, and velvetleaf...

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Bibliographic Details
Published inWeed science Vol. 42; no. 2
Main Authors Schneegurt, M.A, Heim, D.R, Larrinua, I.M
Format Journal Article
LanguageEnglish
Published 01.04.1994
Subjects
ABUTILON THEOPHRASTI
AMARANTHUS
ARABIDOPSIS THALIANA
DESINTOXICACION
DETOXIFICATION
GALIUM
HERBICIDAS
HERBICIDE
METABOLISME
METABOLISMO
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Summary:Isoxaben is an inhibitor of the synthesis of cellulose from glucose. Some dicot weed species are relatively insensitive to isoxaben inhibition. This study investigates mechanisms by which decreased sensitivity may occur in three dicot weed species: catchweed bedstraw, redroot pigweed, and velvetleaf. Dose response curves were generated to determine 150 values for the inhibition of glucose incorporation into cellulose by isoxaben and compared to that of a sensitive species, mouse-ear cress. Metabolic detoxification and uptake rates were measured and the degree of tolerance conferred by these mechanisms was calculated. In all cases, metabolic detoxification was negligible. Lower uptake rates were significant but minor components of tolerance in all species. It is suggested that the principal cause of isoxaben tolerance in these dicot weed species is decreased sensitivity at the target site
Bibliography:9504789
F60
H60
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500080218