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Effect of calcium (Ca) and potassium (K) alone and in combination on the activity of superoxide dismutase (SOD) (A), catalase (CAT) (B), ascorbate peroxidase (APX) (C), and glutathione reductase (GR) (D) in chickpea seedlings under cadmium (Cd) stress. Data presented are the means ± SE (n = 5). Different letters indicate significant difference (P ≤ 0.05) among the treatments.
