Reduction of Dimethylarsenate to Highly Toxic Dimethylarsenite in Paddy Soil and Rice Plants

Dimethylarsenate [DMAs­(V)] is a common methylated As species in soils and plants and can cause the physiological disorder straighthead disease in rice. Because DMAs­(V) is relatively noncytotoxic, we hypothesize that phytotoxicity of DMAs­(V) may arise from trivalent dimethylarsenite [DMAs­(III)]....

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