Inhibition of plant acetyl-coenzyme a carboxylase by the herbicides sethoxydim and haloxyfop

J. D. Burton, J. W. Gronwald, D. A. Somers, J. A. Connelly, B. G. Gengenbach, D. L. Wyse

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144 Scopus citations

Abstract

Incorporation of [14C]acetate or [14c]pyruvate into fatty acids in isolated corn seedling chloroplasts was inhibited 90% or greater by 10 μM sethoxydim or 1 μM haloxyfop. At these concentrations, neither sethoxydim nor haloxyfop inhibited [14c]acetate incorporation into fatty acids in isolated pea chloroplasts. Sethoxydim (10 μM) and haloxyfop (1 μM) did not inhibit incorporation of [14c]malonyl-CoA intofatty acids in cell free extracts from corn tissue cultures. Acetyl coenzyme A carboxylase (EC 6.4.1.2) from corn seedling chloroplasts was inhibited by both sethoxydim and haloxyfop, with I50 values of 2.9 and 0.5 μM, respectively. This enzyme in pea was not inhibited by 10 μM sethoxydim or 1 μM haloxyfop.

Original languageEnglish (US)
Pages (from-to)1039-1044
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume148
Issue number3
DOIs
StatePublished - Nov 13 1987

Bibliographical note

Funding Information:
Cooperative investigations of the Minnesota Agric. Exp. Stn. and the U.S. Dep. Agric., Agric. Res. Service. Paper no. 15,535, Sci. J. Ser., Minnesota Agric. Exp. Stn., St. Paul, MN. We wish to thank BASF Corporation for financial support.

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