Mode of Herbicidal and Selective Action of DPX-F5384 between Rice and Weeds
1986 Volume 31 Issue 2 Pages 157-163
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1986 Volume 31 Issue 2 Pages 157-163
DPX-F5384 is the active ingredient in the rice herbicide Londax®. Growth inhibition promoted by DPX-F5384 in pea roots can be reversed by addition of valine and isoleucine, suggesting inhibition of the pathway for branched-chain amino acid biosynthesis. This compound readily inhibits an enzyme in this pathway, acetolactate synthase. Although acetolactate synthase from rice is also inhibited by DPX-F5384, the rice plant is tolerant due to its ability to metabolically demethylate DPX-F5384 to a relatively weak inhibitor of its acetolactate synthase.
