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- W2003044467 abstract "Abstract The herbicide antidotes N,N-diallyl-2,2-dichloroacetamide (R25788) and 3-dichloroacetyl-2,2,5-trimethyloxazolidine (R29148) at ppm levels slightly enhance the uptake of [35S]sulfate in corn roots and greatly increase its metabolism to “bound sulfide”, cysteine, and glutathione (GSH). The decrease in free sulfate content of the roots with R25788 is closely associated with an increase in GSH level. The sulfate content is decreased with an 8-hr exposure to R25788 and R29148 at 3 ppm and its decline continues through 48 hr to about 5% of the control level. Effects on sulfate content are evident at 24 hr even with 0.3–1 ppm of these antidotes. Several other mono- or dichloroacetamide antidotes at 30 ppm also decrease the free sulfate content of corn roots to about 34–60% of control levels within 24 hr. R25788 at 30 ppm has little or no effect at 24 hr on sulfate levels in corn leaves whether the plants are grown in the light or in the dark. R25788 and R29148 decrease sulfate levels in the leaves of milo and in whole pigweed plants, but not in barley, lambsquarters, water grass, wheat, or wild mustard. In increasing GSH biosynthesis, the antidote acts in corn prior to the reduction step to form bound sulfide; in fact, R25788 increases the specific activity of ATP sulfurylase, the first enzyme involved in sulfate assimilation. Thus, dichloroacetamides such as R25788 and R29148 provide a means to experimentally, and perhaps even practically, manipulate sulfate utilization in corn and some other plants." @default.
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- W2003044467 date "1983-06-01" @default.
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- W2003044467 title "Dichloroacetamide herbicide antidotes enhance sulfate metabolism in corn roots" @default.
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- W2003044467 doi "https://doi.org/10.1016/0048-3575(83)90064-0" @default.
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