Uniconazole Foliar Spray Treatment Alleviates Cold Stress in Adzuki Bean (Vigna angularis) Seedlings

文献类型： 外文期刊

第一作者： Xiang, Hongtao

作者： Xiang, Hongtao;Li, Wan;Wang, Xueyang;Wang, Tongtong;Wang, Manli;Yang, Chunjie;He, Ning;Zheng, Dianfeng;Liang, Xiaoyan;Liang, Yuting;Liu, Jia

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关键词： Cold; Uniconazole; Adzuki bean; Seedling stage; Yield

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2020 年 23 卷 1 期

页码：

收录情况： SCI

摘要： Uniconazole is a plant growth regulator that inhibits the cytochrome P450 family of enzymes, which are involved in the catabolism of abscisic acid (ABA), and promotes plant growth and stress resistance. To investigate the cold-stress resistance of adzuki bean (Hgna angularis) seedlings, the cold-tolerant accession Baoqinghong (BQH) and the cold-sensitive accession Tianjinhong (TJH) were foliar sprayed with 20 mu M uniconazole, followed by cold stress at 15 degrees C for 5 d. Our results revealed that foliar spray of 20 mu M uniconazole considerably increased the crop yield and yield-related parameters, including the number of pods per plant, the number of seeds per pot, and the 100-grain weight, in both TJH and BQH under cold stress. The malondialdehyde (MDA) and osmolyte content as well as antioxidant enzymatic activity were higher in BQH than in TJH. Foliar treatment with uniconazole (20 mu M; 225 L/Ha) significantly increased the yields in both BQH and TJH under cold-stress exposure. Therefore, we concluded that foliar treatment with 20 mu M uniconazole effectively promoted the cold tolerance of the adzuki bean cultivars by interacting with endogenous ABA and physiological adaptation, including the activities of antioxidant enzymes and the levels of osmolytes. These results provide novel insights and are expected to aid in the development of more effective stress resistance breeding programs in adzuki bean production. (C) 2020 Friends Science Publishers

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