College of Plant Science, Jilin University, Xi'an Road, Changchun 130062, China.
Int J Mol Sci. 2021 Jul 7;22(14):7313. doi: 10.3390/ijms22147313.
Salt stress seriously restricts crop yield and quality, leading to an urgent need to understand its effects on plants and the mechanism of plant responses. Although phytohormones are crucial for plant responses to salt stress, the role of phytohormone signal transduction in the salt stress responses of stress-resistant species such as has not been reported. Herein, we combined transcriptome and metabolome analyses to evaluate expression changes of key genes and metabolites associated with plant hormone signal transduction in roots under salt stress for 0 h to 72 h. Auxin, cytokinin, brassinosteroid, and gibberellin signals were predominantly involved in regulating growth and recovery under salt stress. Ethylene and jasmonic acid signals may negatively regulate the response of to salt stress. Abscisic acid and salicylic acid are significantly upregulated under salt stress, and their signals may positively regulate the plant response to salt stress. Additionally, salicylic acid (SA) might regulate the balance between plant growth and resistance by preventing reduction in growth-promoting hormones and maintaining high levels of abscisic acid (ABA). This study provides insight into the mechanism of salt stress response in and the corresponding role of plant hormones, which is beneficial for crop resistance breeding.
盐胁迫严重限制了作物的产量和品质，因此迫切需要了解其对植物的影响以及植物响应的机制。尽管植物激素对于植物对盐胁迫的响应至关重要，但在耐盐物种如 中，植物激素信号转导在盐胁迫响应中的作用尚未得到报道。在这里，我们结合转录组和代谢组分析，评估了盐胁迫 0 至 72 小时期间，与植物激素信号转导相关的关键基因和代谢物在 根中的表达变化。生长素、细胞分裂素、油菜素内酯和赤霉素信号主要参与调节盐胁迫下 的生长和恢复。乙烯和茉莉酸信号可能负调控 对盐胁迫的响应。在盐胁迫下，脱落酸和水杨酸显著上调，其信号可能正向调节植物对盐胁迫的响应。此外，水杨酸 (SA) 可能通过防止生长促进激素的减少和维持较高水平的脱落酸 (ABA) 来调节植物生长和抗性之间的平衡。本研究为 盐胁迫响应机制以及植物激素的相应作用提供了深入了解，这有利于作物抗性的培育。
