Figure 5.
Effect of separately applied ZnSO4 (1.0 g Kg−1 soil) and ZnO (1.0 g Kg−1 soil) on the activities of (A) catalase (CAT), (B) glutathione S-transferase (GST), (C) guaiacol peroxidase (GPOD), and (D) ascorbate peroxidase (APX) in the leaves of cotton plants that were subjected to water deprivation-induced drought stress for 6 days. The means and standard deviations (n = 3) are displayed as bars. Significant changes (p < 0.05) among the treatments are denoted by different letters (a–d) above the bars as calculated using the least significant difference test. Here, the treatments are well-watered plants (WW), ZnSO4-supplemented well-watered plants (ZnSO4), ZnO-supplemented well-watered plants (ZnO), drought-stressed plants (DS), ZnSO4-supplemented drought-stressed plants (ZnSO4 + DS), and ZnO-supplemented drought-stressed plants (ZnO + DS).