数字农科院2.0

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;Wang, Xiangru;Qi, Qian;Iqbal, Asif;Zhang, Hengheng;Shi, Jianbin;Dong, Qiang;Xu, Qinghua;Liu, Xiaohong;Gui, Huiping;Song, Meizhen;Zhang, Xiling;Yan, Gentu

作者机构：

关键词： Cotton;?-Aminobutyric acid shunt;Metabolic adjustment;Salinity tolerance;Seed priming;Triacylglycerol

期刊名称： INDUSTRIAL CROPS AND PRODUCTS

ISSN： 0926-6690

年卷期： 2022 年 186.0 卷

页码：

收录情况： SCIE（2022版） ; EI（2022版）

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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