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Genomic Insights into ARR Genes: Key Role in Cotton Leaf Abscission Formation

文献类型: 外文期刊

作者: Shi, Hongyan 1 ; Wang, Zhenyu 2 ; Zhang, Yuzhi 2 ; Cheng, Gongye 2 ; Huang, Peijun 2 ; Yang, Li 2 ; Tan, Songjuan 2 ; Cao, Xiaoyu 2 ; Pei, Xiaoyu 2 ; Liang, Yu 2 ; Gao, Yu 2 ; Ren, Xiang 2 ; Chen, Quanjia 1 ; Ma, Xiongfeng 1 ;

作者机构: 1.Xinjiang Agr Univ, Coll Agr, Engn Res Ctr Cotton, Minist Educ, 311 Nongda East Rd, Urumqi 830052, Peoples R China

2.Chinese Acad Agr Sci, Inst Cotton Res, State Key Lab Cotton Biobreeding & Integrated Util, Anyang 455000, Peoples R China

3.Chinese Acad Agr Sci, Western Agr Res Ctr, Changji 831100, Peoples R China

关键词: ARR genes family; Gossypium hirsutum; VIGS; leaf abscission

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: 2025 年 26 卷 15 期

页码:

收录情况: SCI

摘要: The cytokinin response regulator (ARR) gene is essential for cytokinin signal transduction, which plays a crucial role in plant growth and development. However, the functional mechanism of ARR genes in cotton leaf abscission remains incompletely understood. In this study, a total of 86 ARR genes were identified within the genome of Gossypium hirsutum. These genes were categorized into four distinct groups based on their phylogenetic characteristics, supported by analyses of gene structures and conserved protein motifs. The GhARR genes exhibited an uneven distribution across 25 chromosomes, with three pairs of tandem duplication events observed. Both segmental and tandem duplication events significantly contributed to the expansion of the ARR gene family. Furthermore, numerous putative cis-elements were identified in the promoter regions, with hormone and stress-related elements being common among all 86 GhARRs. Transcriptome expression profiling screening results demonstrated that GhARRs may play a mediating role in cotton's response to TDZ (thidiazuron). The functional validation of GhARR16, GhARR43, and GhARR85 using virus-induced gene silencing (VIGS) technology demonstrated that the silencing of these genes led to pronounced leaf wilting and chlorosis in plants, accompanied by a substantial decrease in petiole fracture force. Overall, our study represents a comprehensive analysis of the G. hirsutum ARR gene family, revealing their potential roles in leaf abscission regulation.

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