Unveiling the Role of GhP5CS1 in Cotton Salt Stress Tolerance: A Comprehensive Genomic and Functional Analysis of P5CS Genes
文献类型： 外文期刊
作者： Fang, Hui 1 ; Gao, Xin 1 ; Wu, Yunhao 1 ; Zhang, Ke 1 ; Wu, Ying 1 ; Li, Junyi 1 ; Qian, Dongmei 1 ; Li, Ruochen 1 ; Gu, Haijing 1 ; Mehari, Teame Gereziher 1 ; Shen, Xinlian 3 ; Wang, Baohua 1 ;
作者机构： 1.Nantong Univ, Inst Modern Agr, Sch Life Sci, Nantong 226019, Peoples R China
2.Chinese Acad Agr Sci, Inst Cotton Res, State Key Lab Cotton Biobreeding & Integrated Util, Anyang 455000, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Ind Crops, Key Lab Cotton & Rapeseed Nanjing, Minist Agr, Nanjing 210014, Peoples R China
关键词：
cotton genomics;
期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）
ISSN： 2223-7747
年卷期： 2025 年 14 卷 2 期
页码：
收录情况： SCI
摘要： Proline, a critical osmoregulatory compound, is integral to various plant stress responses. The P5CS gene, which encodes the rate-limiting enzyme in proline biosynthesis, known as triangle 1-pyrroline-5-carboxylate synthetase, is fundamental to these stress response pathways. While the functions of P5CS genes in plants have been extensively documented, their specific roles in cotton remain inadequately characterized. In this study, we identified 40 P5CS genes across four cotton species with diverse sequence lengths and molecular weights. Phylogenetic analysis of 100 P5CS genes from nine species revealed three subgroups, with Gossypium hirsutum closely related to Gossypium barbadense. Collinearity analysis highlighted significant differences in collinear gene pairs, indicating evolutionary divergence among P5CS genes in tetraploid and diploid cotton. Exon-intron structures and conserved motifs correlated with phylogenetic relationships, suggesting functional differentiation. Stress-responsive elements in P5CS promoters suggest involvement in abiotic stress. Expression analysis under salt stress revealed differential expressions of GhP5CS genes, with GhP5CS1 emerging as a potential key regulator. Virus-induced gene silencing confirmed the pivotal role of GhP5CS1 in cotton's salt stress response, as evidenced by increased salt sensitivity in the silenced plants. This study enhances our understanding of the functional diversity and roles of P5CS genes in cotton under stress conditions.
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