文献类型： 外文期刊

作者： Hu Guang ¹ ; Ge Xiaoyang ¹ ; Wang Zhian ³ ; Wang Ye ¹ ; Wang Peng ¹ ; Shi Linfang ² ; Wang Bingting ² ; Zhang Anhong ³ ; Li Fuguang ¹ ; Wu Jiahe ² ;

作者机构： 1.Chinese Acad Agr Sci, Natl Key Lab Cotton Bio breeding & Integrated Uti, Inst Cotton Res, Anyang 455000, Peoples R China

2.Chinese Acad Sci, Inst Microbiol, State Key Lab Plant Genom, Beijing 100101, Peoples R China

3.Shanxi Agr Univ, Inst Cotton Res, Yuncheng 044000, Peoples R China

关键词： GhMYB33; ghr-miR319c; Trade-off; Gossypium hirsutum; Verticillium dahliae

期刊名称：JOURNAL OF ADVANCED RESEARCH （ 影响因子：11.4； 五年影响因子：11.0 ）

ISSN： 2090-1232

年卷期： 2024 年 61 卷

页码：

收录情况： SCI

摘要： Introduction: Sessile plants engage in trade-offs between growth and defense capacity in response to fluctuating environmental cues. MYB is an important transcription factor that plays many important roles in controlling plant growth and defense. However, the mechanism behind how it keeps a balance between these two physiological processes is still largely unknown. Objectives: Our work focuses on the dissection of the molecular mechanism by which GhMYB33 regulates plant growth and defense. Methods: The CRISPR/Cas9 technique was used to generate mutants for deciphering GhMYB33 functions. Yeast two-hybrid, luciferase complementary imaging, and co-immunoprecipitation assays were used to prove that proteins interact with each other. We used the electrophoretic mobility shift assay, yeast onehybrid, and luciferase activity assays to analyze GhMYB33 acting as a promoter. A b-glucuronidase fusion reporter and 5' RNA ligase mediated amplification of cDNA ends analysis showed that ghr-miR319c directedly cleaved the GhMYB33 mRNA. Results: Overexpressing miR319c-resistant GhMYB33 (rGhMYB33) promoted plant growth, accompanied by a significant decline in resistance against Verticillium dahliae. Conversely, its knockout mutant, ghmyb33, demonstrated growth restriction and concomitant augmentation of V. dahliae resistance. GhMYB33 was found to couple with the DELLA protein GhGAI1 and bind to the specific cis-elements of GhSPL9 and GhDFR1 promoters, thereby modulating internode elongation and plant resistance in V. dahliae infection. The ghr-miR319c was discovered to target and suppress GhMYB33 expression. The overexpression of ghrmiR319c led to enhanced plant resistance and a simultaneous reduction in plant height. Conclusion: Our findings demonstrate that GhMYB33 encodes a hub protein and controls the expression of GhSPL9 and GhDFR1, implicating a pivotal role for the miR319c- MYB33 module to regulate the tradeoffs between plant growth and defense. (c) 2024 The Authors. Published by Elsevier B.V. on behalf of Cairo University. This is an open access article under the CC BY -NC -ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).