Abstract
Parathion incubated with cultures of Rhizobium japonicum and R. meliloti was metabolized primarily by nitro-reduction; 85% of the initial parathion was reduced to amino parathion. About 10% of the parathion was hydrolyzed to O,O-diethyl phosphorothioic acid (DEPT A) Both amino parathion and DEPT A have negligible toxicity compared with parathion. Reduced glutathione enhanced the production of DEPTA, whereas NADPH2 was without effect. No paraoxon was detected. Rhizobial populations decreased under the influence of parathion.
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