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Ameliorating effect of calcium and potassium on the activity of (A) antioxidant enzymes catalase (CAT) and peroxidase (POD) and (B) superoxide dismutase (SOD) of faba bean plants under Cd stress. Bars followed by the same letters show no statistical difference at P<0.05 (Duncan Multiple Range Test). Average of four determinations are presented with bars indicating SE.
