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Response of exogenous melatonin on transcription and metabolism of soybean under drought stress

文献类型： 外文期刊

作者： Cao, Liang 1 ; Zou, Jingnan 2 ; Qin, Bin 1 ; Bei, Shijun 1 ; Ma, Weiran 1 ; Yan, Bowei 3 ; Jin, Xijun 1 ; Zhang, Yuxian 1 ;

作者机构： 1.Heilongjiang Bayi Agr Univ, Key Lab Soybean Mechanized Prod, Minist Agr & Rural Affairs, Daqing, Peoples R China

2.Fujian Agr & Forestry Univ, Coll Life Sci, Fuzhou, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Ind Crops, Harbin, Peoples R China

4.Natl Coarse Cereals Engn Technol Res Ctr, Daqing, Peoples R China

5.Natl Coarse Cereals Engn Technol Res Ctr, Daqing 163319, Peoples R China

期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：6.4； 五年影响因子：5.9 ）

ISSN： 0031-9317

年卷期： 2023 年 175 卷 5 期

页码：

收录情况： SCI

摘要： Amino acid metabolism is an important factor in regulating nitrogen source assimilation and source/sink transport in soybean. Melatonin can improve plant stress resistance, but whether it affects amino acid metabolism is not known. Therefore, this study investigated whether exogenous melatonin had an effect on amino acid metabolism of soybean under drought conditions and explored its relationship with yield. The treatments were normal water supply treatment (WW), drought stress treatment (D), drought stress and melatonin treatment group (D + M), sprayed with 100 mu mol/L melatonin. The effects of melatonin on amino acid metabolism and grain filling were studied by physiological and omics experiments using Kangxian 9 (drought-sensitive variety) and Suinong 26 (drought-resistant variety) soybean cultivars. The results showed that drought stress decreased the activity of carbon and nitrogen metabolizing enzymes, which inhibited the accumulation of dry matter and protein, and decreased the yield. In the drought-sensitive soybean variety, glycoenzymes and amino acid synthetases synthetic genes were upregulated in melatonin-treated soybeans, hence carbon and nitrogen metabolism enzyme activity increased, increasing the carbohydrate and amino acid contents simultaneously. This resulted in higher dry matter and yield than drought-stressed soybean not treated with melatonin. In the drought-resistant variety, the grain weight per plant increased by 7.98% and 6.57% in 2020 and 2021, respectively, while it increased by 23.20% and 14.07% in the drought-sensitive variety during the respective years. In conclusion, melatonin treatment can enhance the activity of nitrogen and carbon metabolism and amino acid content by upregulating the expression of soybean metabolic pathway and related genes, thus increasing the yield of soybean under drought stress.

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