期刊
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
卷 185, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.envexpbot.2021.104427
关键词
Salinity; GhANN1ABA; Ion homeostasis; Phenylpropanoid; Pathway; GhWRKY40-like
资金
- National Natural Science Foundation in China [U1903203]
- Fundamental Research Funds for the Central Universities [KYYJ201901]
- Jiangsu Collaborative Innovation Center for Modern Crop Production project [10]
The study revealed that GhANN1 enhances cotton salt tolerance by regulating ABA accumulation, coordinating ion homeostasis, and participating in the phenylpropanoid biosynthesis pathway, providing valuable gene resources for cotton salt-tolerant breeding.
Soil salinity is a major environmental stressor and seriously affects cotton yield and quality. ANNEXINs (ANNs) are a family of calcium-dependent membrane binding proteins, which function in many cellular processes. In this study, we found that GhANN1 (GenBank Accession No: KM062523), encoding an annexin protein in cotton, was strongly upregulated by phytohormone abscisic acid (ABA) and salt stress treatments. Overexpressing GhANN1 improved cotton tolerance to salinity stress, in which GhANN1 regulated ABA and phenylpropanoid biosynthesis pathways and increased the expression of Na+, K+ transporter-related genes in cotton roots. Additionally, transcriptional repressor GhWRKY40-like was involved in ABA-dependent pathway, which could bind directly to the GhANN1 promoter to form a novel GhANN1-ABA-GhWRKY40-like loop and fine-tune cotton response to salt stress. This study reveals the function of GhANN1 in enhancing cotton salt tolerance by regulating ABA accumulation, coordinating ion homeostasis, and participating in phenylpropanoid biosynthesis pathway, which will deepen our insight into plant response to abiotic stresses and provide valuable gene resources for cotton salt-tolerant breeding.
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