文献类型： 外文期刊
作者： Hou, Xiaomin 1 ; Yan, Feng 1 ; Dong, Yang 1 ; Zhao, Fuyang 1 ; Li, Qingquan 1 ; Shen, Huibo 1 ;
作者机构： 1.Heilongjiang Acad Agr Sci, Qiqihar Sub Acad, Qiqihar 161006, Heilongjiang, Peoples R China
关键词： Antioxidant enzymes; Drought stress; Endogenous hormones; Mepiquat chloride; Soybean
期刊名称：LEGUME RESEARCH （ 影响因子：0.8； 五年影响因子：0.8 ）
ISSN： 0250-5371
年卷期： 2024 年 47 卷 4 期
页码：
收录情况： SCI
摘要： Background: Drought is an important factor restricting the development of agriculture. In recent years, plant growth regulators have achieved more results in improving crop stress resistance. The physiological mechanism of exogenous application of mepiquat chloride on soybean seedlings has undergone significant changes under drought stress. Methods: In order to study the effect of exogenous chlorine on the physiology of soybean under drought stress., 'Heinong 65' was used as the experimental material, 15% PEG -6000 was used to simulate drought stress and different concentrations of mepiquat chloride solution (100, 300, 500, 700 mg/L) were sprayed at the three -leaf stage of soybean growth by pot method. The dry matter accumulation, auxin (IAA), zeatin (ZA), gibberellin (GA 3 ), abscisic acid (ABA) content and superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbate peroxidase (APX) activity of soybean were determined. Result: The results showed that the activities of antioxidant enzymes SOD, POD, CAT and APX in soybean leaves under drought stress were significantly increased by the treatment of appropriate concentration of mepiquat chloride solution. IAA, GA 3 and ZA endogenous hormone levels increased, dry matter accumulation increased, root -shoot ratio and ABA endogenous hormone levels decreased significantly. It can be seen that mepiquat chloride treatment can improve the antioxidant capacity, promote the growth of soybean seedlings under drought stress and effectively alleviate the inhibition of drought stress on soybean growth and development.
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