R2R3 MYB Transcription Factor GhMYB201 Promotes Cotton Fiber Elongation via Cell Wall Loosening and Very-Long-Chain Fatty Acid Synthesis
文献类型： 外文期刊
作者： Suo, Qingwei 1 ; Fang, Nianjuan 1 ; Zeng, Jianyan 1 ; Yan, Fulin 1 ; Zhu, Xi 1 ; Wang, Yi 1 ; Yu, Wanting 1 ; Chen, Junmin 1 ; Liang, Aimin 1 ; Li, Yaohua 2 ; Kong, Jie 2 ; Xiao, Yuehua 1 ;
作者机构： 1.Southwest Univ, Coll Agron & Biotechnol, Chongqing Key Lab Crop Mol Improvement, Chongqing 400716, Peoples R China
2.Xinjiang Acad Agr Sci, Inst Econ Crops, Urumqi 830091, Peoples R China
关键词： Gossypium hirsutum; fiber elongation; cell wall loosening; KCS
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 17 期
页码：
收录情况： SCI
摘要： Cotton fiber is the leading natural textile material, and fiber elongation plays an essential role in the formation of cotton yield and quality. Although a number of components in the molecular network controlling cotton fiber elongation have been reported, a lot of players still need to be functionally dissected to understand the regulatory mechanism of fiber elongation comprehensively. In the present study, an R2R3-MYB transcription factor gene, GhMYB201, was characterized and functionally verified via CRISPR/Cas9-mediated gene editing. GhMYB201 was homologous to Arabidopsis AtMYB60, and both coding genes (GhMYB201At and GhMYB201Dt) were preferentially expressed in elongating cotton fibers. Knocking-out of GhMYB201 significantly reduced the rate and duration of fiber elongation, resulting in shorter and coarser mature fibers. It was found that GhMYB201 could bind and activate the transcription of cell wall loosening genes (GhRDLs) and also beta-ketoacyl-CoA synthase genes (GhKCSs) to enhance very-long-chain fatty acid (VLCFA) levels in elongating fibers. Taken together, our data demonstrated that the transcription factor GhMYB201s plays an essential role in promoting fiber elongation via activating genes related to cell wall loosening and VLCFA biosynthesis.
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