Melatonin Promotes Yield Increase in Wheat by Regulating Its Antioxidant System and Growth Under Drought Stress

文献类型： 外文期刊

第一作者： Li, Xue

作者： Li, Xue;Liu, Ze;Li, Kunzhi;Li, Xue;Liu, Jia;Zhang, Cuiping;Guo, Xiang;Li, Shaoxiang;Li, Hongsheng;Liu, Kun;Ding, Mingliang;Ding, Mingliang

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关键词： wheat; melatonin seed coating; antioxidant activity; yield

期刊名称：BIOLOGY-BASEL （ 影响因子：3.5； 五年影响因子：4.0 ）

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年卷期： 2025 年 14 卷 1 期

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收录情况： SCI

摘要： Drought stress constitutes a major challenge to wheat production. Melatonin plays a vital role in plants' resistance to drought stress. Nevertheless, the influence of melatonin seed coating on the drought resistance ability of wheat remains unclear. Hence, in this study, wheat (Yunmai 112) was chosen as the experimental material. The research results indicated that 100 mu M exogenous melatonin treatment enhanced the germination rate of wheat seeds by 11% compared to the CK group. Melatonin seed coating (100 or 200 mu M) significantly inhibited the accumulation of ROS in wheat seedlings under drought stress conditions and facilitated the growth of wheat seedlings. Then, 100 mu M melatonin seed coating elevated the activity of antioxidant enzymes (CAT, Cu/Zn-SOD, POD, and T-GSH) in wheat seedlings and strengthened the resistance of wheat to drought stress. In contrast to the control, 100 or 200 mu M melatonin seed coating significantly raised the contents of soluble protein and chlorophyll in wheat seedlings. Further studies demonstrated that 100 mu M melatonin seed coating promoted the increase in the thousand-grain weight and yield of wheat under drought stress. Taking together, melatonin seed coating is an effective approach for enhancing the stress resistance and the yield of wheat under drought stress.

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