Figure 2.

Total glutathione (GSH) concentrations (nmol g⁻¹ fresh weight) in leaves (green bars) and roots (grey bars) of Arabidopsis thaliana plants grown under control conditions (0 μM CdSO4, light bars) or exposed to 5 μM CdSO4 (dark bars) during 2 h, 4 h, 6 h and 24 h after 3 weeks of growth. For each time point, data represent the mean ± S.E. of four biological independent replicates. Significant differences (t-test: p < 0.05) between control and exposed plants, within each time point, are indicated with an asterisk (*).