In vitro metabolism of diazinon and etrimfos by corn plant preparations |
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| Authors: | YM Ioannou WC Dauterman |
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| Institution: | Toxicology Program, Department of Entomology, North Carolina State University, Raleigh, North Carolina 27650 USA |
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| Abstract: | Homogenates prepared from excised roots or stems and leaves of corn seedlings metabolize up to 72% of 14C]pyrimidinyl-labeled diazinon (O,O-diethyl-O-6-methyl-2-(1-methylethyl)-4-pyrimidinyl]phosphorothioate) to 6-methyl-2-(1-methylethyl)-4-hydroxypyrimidine and one unidentified metabolite. Six-day-old corn seedling homogenate had the highest degradative activity. The optimum pH for activity was 6.0 and the activity was found to reside in the cytosol. Etrimfos O,O-dimethyl-O-(6-ethyl-4-pyrimidinyl)phosphorothioate] was not susceptible to degradation by the corn plant preparation. |
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