Late embryogenesis abundant gene GhLEA-5 of semi-wild cotton positively regulates salinity tolerance in upland cotton
文献类型： 外文期刊
作者： Tian, Chunyan 1 ; Rehman, Abdul 1 ; Wang, Xiaoyang 2 ; Wang, Zhenzhen 4 ; Li, Hongge 1 ; Ma, Jun 4 ; Du, Xiongming 1 ; Peng, Zhen 1 ; He, Shoupu 1 ;
作者机构： 1.Zhengzhou Univ, Sch Agr Sci, State Key Lab Cotton Biobreeding & Integrated Util, Zhengzhou Res Base, Zhengzhou 450001, Peoples R China
2.Chinese Acad Agr Sci ICR, Inst Cotton Res, State Key Lab Cotton Biobreeding & Integrated Util, CAAS, Anyang 455000, Henan, Peoples R China
3.Chinese Acad Agr Sci, Western Agr Res Ctr, Changji 831100, Peoples R China
4.Xinjiang Acad Agr Sci, Res Inst Econ Crops, Urumqi 830091, Peoples R China
关键词： Cotton; Salt tolerance; GhLEA-5; Functional verification
期刊名称：GENE （ 影响因子：2.4； 五年影响因子：2.8 ）
ISSN： 0378-1119
年卷期： 2025 年 949 卷
页码：
收录情况： SCI
摘要： The productivity and quality of cotton are significantly compromised by salt stress. In this study, the full length of encoding region and genomic DNA sequences of GhLEA_5A/D (Gh_A10G166600 and Gh_D10G188300), which belong to the late embryogenesis abundant gene family in allotetraploid upland cotton (Gossypium hirsutum L.) and semi-wild cotton (Gossypium purpurascens), were isolated and their salt tolerance was experimentally confirmed. Analysis of sequence alignments and phylogenetic trees indicated a significant level of homology between GhLEA-5A and GhLEA-5D. Additionally, a conserved protein motif was consistently identified across these sequences. The transcriptome data analysis showed that the expression level of GhLEA-5A/D was substantially enhanced in the leaves of salt-tolerant G. purpurascens accessions compared to salt-sensitive materials. In the real-time quantitative reverse transcription PCR (qRT-PCR) assays, notable expression levels of the GhLEA5D gene were detected in salt-tolerant upland cotton materials following exposure to salt stress at 3 and 12-hour time points. The suppression of GhLEA-5A/D transcription via Virus-induced Gene Silencing (VIGS) technology significantly exacerbates salt sensitivity in cotton. This is evidenced by the nearly 50 % increase in malondialdehyde (MDA) content alongside a 60 % reduction in peroxidase (POD) levels in salt-treated plants when compared to the control group. The overexpression of the GhLEA-5A/D gene conferred enhanced salt tolerance in Arabidopsis, resulting in a 25 % increase in root length, a 30 % improvement in survival rate, a 15 % increase in water retention, and a 15 % boost in photosynthetic efficiency. The chlorophyll fluorescence parameters, enzyme activities, diaminobenzine, and nitroblue tetrazolium staining suggested that GhLEA-5A/D likely exhibited a positive regulatory role for cotton responding to salt stress. Furthermore, we identified 76 candidate proteins that potentially interact with GhLEA-5 in the yeast two-hybrid screening library. These results provide a theoretical basis for studying the mechanism of cotton salt tolerance and offer new resources for improving cotton salt tolerance genes.
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