Fig. 2 Effects of spraying MeJA during flowering and boll-setting stage on photosynthetic parameters of cotton under heat stress The bar chart showed the value of photosynthetic parameters, and the line chart showed the change rate of photosynthetic parameters at each time point compared with that of 0 d. Different lowercase letters indicate significant difference (P < 0.05).
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).