Figure 7.

Effect of NaCl on antioxidant enzyme activity and relative electrolyte leakage in the wild-type and PtEXPA6-overexpressing lines of 84K and 717-1B4. The PtEXPA6-overexpressing lines of 84K (L11, L12, and L13) and 717-1B4 (L9, L15, and L16), and wild-type (WT) were exposed to NaCl with 0 or 100 mM for 15 days. The activity of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), and relative electrolyte leakage were measured in the leaves of the no-salt control and salinized plants after 15 days of the salt treatment. (A) POD activity. (B) SOD activity. (C) CAT activity. (D) Relative electrolyte leakage. The data are means ± SD (n = 3), and the bars with different letters indicate significant differences (p < 0.05).