Fig. 5
Analysis of metal xylem loading as a function of Zn and Cd concentration in the mobile fractions. Rice plants were hydroponically grown and exposed for a 10-day period to increasing Zn external concentrations (from 0.1 to 10 μM), in the presence of 0.1 μM Cd2+ (a and b), or to different Cd concentrations (from 0.01 to 1 μM) in the presence of 1 μM Zn2+ (c and d). a and b Zn (circles) and Cd (square) translocation in plants exposed to 0.1 (white), 1 (grey) and 10 (black) μM Zn2+, in the presence of 0.1 μM Cd2+. c and d Zn (circles) and Cd (square) translocation in plants exposed to 0.01 (white), 0.1 (grey) and 1 (black) μM Cd2+, in the presence of 1 μM Zn2+. Data reported in figures derive from Fig. 2 and Additional file 1: Tables S1 and S2