Silencing of SlMYB78-like Reduces the Tolerance to Drought and Salt Stress via the ABA Pathway in Tomato
文献类型： 外文期刊
作者： Liu, Yu 1 ; Guo, Pengyu 1 ; Gao, Zihan 1 ; Long, Ting 1 ; Xing, Chuanji 2 ; Li, Jing 1 ; Xue, Jing 2 ; Chen, Guoping 1 ; Xie, Qiaoli 1 ; Hu, Zongli 1 ;
作者机构： 1.Chongqing Univ, Bioengn Coll, Lab Mol Biol Tomato, Room 521,Campus B,174 Shapingba Main St, Chongqing 400044, Peoples R China
2.Beijing Acad Agr & Forestry Sci, Inst Grassland Flowers & Ecol, 11 Shuguanghuayuan Middle Rd, Beijing 100097, Peoples R China
关键词：
tomato;
期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）
ISSN： 1661-6596
年卷期： 2024 年 25 卷 21 期
页码：
收录情况： SCI
摘要： The MYB transcription factor family plays a crucial regulatory role in plant growth, development, biological progress, and stress responses. Here, we identified a R2R3-MYB transcription factor gene, SlMYB78-like, from tomato and characterized its function by gene silencing via RNA interference (RNAi). The results exhibited that the silencing of SlMYB78-like reduced the sensitivity of tomato seedlings to exogenous ABA. In addition, when exposed to drought and salt stresses, the RNAi lines grown in soil showed decreased tolerance, with lower ABA accumulation, relative water content, and chlorophyll content while displaying higher relative conductivity and malondialdehyde (MDA) content than the wild type. Moreover, the expression of genes related to chlorophyll biosynthesis, photosynthesis, and ABA biosynthesis/response were down-regulated in SlMYB78-like-silenced lines. Notably, the transcript level of SlCYP707-A2, which encodes a protein involved in ABA degradation, was up-regulated significantly after stresses. The transient expression assay Dual-luciferase (Dual-LUC) and a yeast one-hybrid (Y1H) assay demonstrated that SlMYB78-like bound to the promoter of SlCYP707-A2. Additionally, the physical interaction between SlMYB78-like and SlDREB3, which functioned in ABA signaling transduction, was identified through yeast two-hybrid (Y2H) and bimolecular fluorescence complementation (BiFC) assays. Collectively, our study illustrates that SlMYB78-like participates in the abiotic stress response via the ABA pathway.
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