Figure 4.

Effect of separately applied ZnSO₄ (1.0 g Kg⁻¹ soil) and ZnO (1.0 g Kg⁻¹ soil) on (A) hydrogen peroxide (H₂O₂), (B) malondialdehyde, and (C) electrolyte leakage levels 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–e) 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). FW, fresh weight.