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SLs signal transduction gene CsMAX2 of cucumber positively regulated to salt, drought and ABA stress in Arabidopsis thaliana L.

文献类型： 外文期刊

作者： Zhang, Runming 1 ; Dong, Yanlong 1 ; Li, Yuanyuan 1 ; Ren, Guangyue 1 ; Chen, Chao 1 ; Jin, Xiaoxia 1 ;

作者机构： 1.Harbin Normal Univ, Coll Life Sci & Technol, Harbin, Peoples R China

2.Heilongjiang Acad Agr Sci, Hort Branch, Harbin, Peoples R China

3.Harbin Normal Univ, Coll Life Sci & Technol, Harbin 150025, Peoples R China

关键词： CsMAX2; Strigolactones; Drought stress; Salt stress; ABA

期刊名称：GENE （ 影响因子：3.5； 五年影响因子：3.3 ）

ISSN： 0378-1119

年卷期： 2023 年 864 卷

页码：

收录情况： SCI

摘要： Recent studies have demonstrated that strigolactones (SLs) participate in the regulation of stress adaptation, however, the mechanisms remain elusive. MAX2 (MORE AXILLARY GROWTH2) is the key gene in the signal transduction pathway of SLs. This study aimed to clone and functionally characterize the CsMAX2 gene of cu-cumber in Arabidopsis. The results showed that the expression levels of the CsMAX2 gene changed significantly after salt, drought, and ABA stresses in cucumber. Moreover, the overexpression of CsMAX2 promoted stress tolerance and increased the germination rate and root length of Arabidopsis thaliana. Meanwhile, the content of chlorophyll increased and malondialdehyde decreased in CsMAX2 OE lines under salt and drought stresses. Additionally, the expression levels of stress-related marker genes, especially AREB1 and COR15A, were signifi-cantly upregulated under salt stress, while the expression levels of all genes were upregulated under drought stress, except ABI4 and ABI5 genes. The level of NCED3 continued to rise under both salt and drought stresses. In addition, D10 and D27 gene expression level also showed a continuous increase under ABA stress. The result suggested the interaction between SL and ABA in the process of adapting to stress. Overall, CsMAX2 could positively regulate salt, drought, and ABA stress resistance, and this process correlated with ABA transduction.

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