Figure 3: Effect of cadmium stress on shoot (S) and root (R) superoxide dismutase activity (SOD) (A), on shoot and root catalase acyivity (CAT) (B) and on shoot and root guaicol peroxidase activity (GPX) of Solanum lycopersicum plants. The plants were grown in presence of 0-50 µM of CdCl2 in the culture medium during 17 days. Values are the means ± SE of triplicates from five independent experiments.