Figure 8: Effect of different concentrations of lead (Pb) (0, 50 and 100 μM) and silicon (0 and 1 mM) on concentrations of lead (Pb) in roots (A), stem (B) and leaves (C) in cotton plants. Values show the means of three replicate ± SE. Means followed by same small letters are not significant different at P ≤ 0.05by using the Tukey test.