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Effect of medium pH on the proportion of undissociated MMA(V) in the medium and the uptake of MMA(V) by wild-type rice (WT1). Plants were exposed to 5 μm MMA(V) for 24 h at different pHs. Total As concentrations in roots (A) and shoots (B), and MMA(V) concentration in xylem sap (C). Error bars are +ses (n = 4). FW, Fresh weight.
