Analysis of the effects of mepiquat chloride priming on the seedling growth-promoting in cotton under salt stress by multi-omics
文献类型： 外文期刊
作者： Wang, Ning 1 ; Wang, Xiangru 1 ; Qi, Qian 1 ; Iqbal, Asif 1 ; Zhang, Hengheng 1 ; Shi, Jianbin 1 ; Dong, Qiang 1 ; Xu, Qinghua 1 ; Liu, Xiaohong 1 ; Gui, Huiping 1 ; Song, Meizhen 1 ; Zhang, Xiling 1 ; Yan, Gentu 1 ;
作者机构： 1.Inst Cotton Res Chinese Acad Agr Sci, State Key Lab Cotton Biol, Anyang 455000, Henan, Peoples R China
2.Zhengzhou Univ, Sch Agr Sci, Zhengzhou 450001, Henan, Peoples R China
关键词： Cotton; ?-Aminobutyric acid shunt; Metabolic adjustment; Salinity tolerance; Seed priming; Triacylglycerol
期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.449； 五年影响因子：6.508 ）
ISSN： 0926-6690
年卷期： 2022 年 186 卷
页码：
收录情况： SCI
摘要： A multi-omics study was conducted on cotton seedlings to determine the growth promotion caused by mepiquat chloride (MC)-priming under salt stress. MC-priming markedly alleviated salt stress inhibition in root anatomical structures, increasing seedling establishment. Comparative multi-omics analyses revealed various energy metabolic pathways as key influencers of MC-priming, explaining the alleviation of salt stress. MC-priming upregulated key proteins and phosphorylation for triacylglycerol (TAG) mobilization, gamma-aminobutyric acid (GABA) shunt, and adenosine triphosphate (ATP) synthesis under salt stress. The coexpression network analyses also suggested that MC-priming regulates these metabolic pathways in a mutual-functioning fashion involving salt tolerance responses. Importantly, the inhibitor of beta-oxidation and GABA-synthesis disrupted the MC-priminginduced growth under salt stress, confirming the importance of these pathways in forming the MC-priming response. MC-priming significantly blocked the salt-triggered TAG accumulation and early enhanced GABA shunt activities under salt stress. Meanwhile, MC-priming improved energy efficiency by up-regulating ATP synthase and down-regulating cytochrome b5-like reductase, thereby enhancing ATP formation and reducing reactive oxygen species production. In addition, MC-priming enhanced antioxidant enzymatic activities under salt stress. These findings provide insights into the energy regulatory pathway of MC-priming that mediates growth-promotion under salt stress. Thus, this study reinforces the potential of MC-priming to improve cotton seed germination under salt stress.
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