Cotton Science

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Effects of exogenous methyl jasmonate on cotton tolerance to heat stress during flowering and boll-setting stage

Xie Xianyun, Feng Changhui, Wang Xiaogang, Xia Songbo, Zhang Jiaohai, Zhang Youchang, Wang Qiongshan, Qin Hongde, Bie Shu

Cotton Science, 2023, 35(5): 365-377. DOI: 10.11963/cs20230017

Fig. 1 Weather condition at the experimental field

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Table 1 Variation of pollen viability of cotton under heat stress in different treatments of MeJA %
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).
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).
Table 2 Effects of MeJA treatment on cotton yield traits under heat stress during flowering and boll-setting stage
Table 3 Effects of MeJA treatment on cotton fiber quality under heat stress during flowering and boll-setting stage

ISSN 1002-7807　CN 41-1163/S
Superintendent: China Association for Science and Technology
Sponsored by: China Association of Agricultural Science Societies
Organized by: Institute of Cotton Research of CAAS

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