Fig. 1From: Characterisation of early responses in lead accumulation and localization of Salix babylonica L. rootsEffects of Pb on S. babylonica root and shoot length exposed to 0, 1, 10, 50, or 100 μmol/L Pb for 7 d. Vertical bars denote the SE. Different letters indicate significant differences (n = 10, p < 0.05)Back to article page