Figure 3.

Response of antioxidant defense to HT in RNAi-SlMPK1 plants. H₂O₂ accumulation (A), the accumulation of the membrane lipid peroxidation product MDA (B), the activities of SOD (C), POD (D), CAT (E), and APX (F), and the content of the nonenzymatic antioxidant AsA (G) and GSH (H) are shown in the wild type (WT) and RNAi-SlMPK1 line 1-24 under control (25°C) or HT (42°C) conditions for 4 h. Error bars represent sd values of three replicates. Statistical differences among the samples are labeled with different letters according to the lsd test (P < 0.05, one-way ANOVA). DCFDA, 2′,7′-Dichlorofluorescin diacetate.