Figure 1.

Concentration of As in the roots (A) and shoots (B) of four H. lanatus clones from an As contaminated (M) and an uncontaminated (NM) site. Plants were exposed to a range of arsenate concentrations for 7 d. Data represent the mean ±se (n = 3). NM1, ●; NM2, ▪; M1, ○; M2, □.