Figure 9.

Determination of antioxidant enzymes activities and related physiological indexes of CtPAL1 and CtC4H1 transgenic plants after drought stress treatment. (A) Superoxide dismutase activity (SOD). (B) Catalase activity (CAT). (C) Peroxidase activity (POD). (D) H₂O₂ content analysis. (E) O₂⁻ content analysis. (F) Proline content analysis. The numerical value represents the average ± standard deviation of three biological repetitive samples. The statistics were calculated with one-way ANOVA test and significant differences between treatments were demonstrated with asterisk (* p < 0.05, ** p < 0.01).