Fig. 3 Effect of spraying MeJA during flowering and boll-setting stage on SOD and POD activity of cotton leaves under heat stress The bar chart showed the value of SOD and POD activity, and the line chart showed the change rate of SOD and POD activity at each time point compared with that of 0 d. Different lowercase letters indicate significant difference (P < 0.05).
Fig. 4 Effect of spraying MeJA during flowering and boll-setting stage on MDA content of cotton leaves under heat stress The bar chart showed the value of MDA content, and the line chart showed the change rate of MDA content at each time point compared with that of 0 d. Different lowercase letters indicate significant difference (P < 0.05).