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As accumulation in wild-type (WT) and ptlpd1-1 plants. Arabidopsis plants (38 d old) grown in the absence of As (see “Materials and Methods”) were transferred to medium containing 0 or 50 μm As(V) and grown for a further 3 d. The As concentrations in the shoots (A) and roots (B) were determined. Means ± se (n = 4 plants) are shown. DW, Dry weight.
