The GhMYB36 transcription factor confers resistance to biotic and abiotic stress by enhancing PR1 gene expression in plants
文献类型： 外文期刊
作者： Liu, Tingli 1 ; Chen, Tianzi 1 ; Kan, Jialiang 1 ; Yao, Yao 1 ; Guo, Dongshu 1 ; Yang, Yuwen 1 ; Ling, Xitie 1 ; Wang, Jinyan 1 ; Zhang, Baolong 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Excellence & Innovat Ctr, Nanjing, Peoples R China
关键词： transcription factors; drought tolerance; transgenic plants; transient expression
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：13.263； 五年影响因子：11.619 ）
ISSN： 1467-7644
年卷期： 2022 年 20 卷 4 期
页码：
收录情况： SCI
摘要： Drought and Verticillium wilt disease are two main factors that limit cotton production, which necessitates the identification of key molecular switch to simultaneously improve cotton resistance to Verticillium dahliae and tolerance to drought stress. R2R3-type MYB proteins could play such a role because of their conserved functions in plant development, growth, and metabolism regulation, however, till date a MYB gene conferring the desired resistance to both biotic and abiotic stresses has not been found in cotton. Here, we describe the identification of GhMYB36, a gene encoding a R2R3-type MYB protein in Gossypium hirsutum, which confers drought tolerance and Verticilium wilt resistance in both Arabidopsis and cotton. GhMYB36 was highly induced by PEG-simulated drought stress in G. hirsutum. GhMYB36-silenced cotton plants were more sensitive to both drought stress and Verticillium wilt. GhMYB36 overexpression in transgenic Arabidopsis and cotton plants gave rise to improved drought tolerance and Verticillium wilt resistance. Transient expression of fused GhMYB36-GFP in tobacco cells was able to localize GhMYB36 in the cell nucleus. In addition, RNA-seq analysis together with qRT-PCR validation in transgenic Arabidopsis overexpressing GhMYB36 revealed significantly enhanced PR1 expression. Luciferase interaction assays indicated that GhMYB36 are probably bound to the promoter of PR1 to activate its expression and the interaction, which was further verified by Yeast one hybrid assay. Taken together, our results suggest that GhMYB36 functions as a transcription factor that is involved in drought tolerance and Verticillium wilt resistance in Arabidopsis and cotton by enhancing PR1 expression.
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