Chinese Academy of Agricultural Sciences, Grassland Research Institute, Hohhot 010010, China.
Chinese Academy of Agricultural Sciences, Grassland Research Institute, Hohhot 010010, China.
Genomics. 2024 Sep;116(5):110893. doi: 10.1016/j.ygeno.2024.110893. Epub 2024 Jun 27.
Understanding phytohormonal signaling is crucial for elucidating plant defense mechanisms against environmental stressors. However, knowledge regarding phytohormone-mediated tolerance pathways under salt stress in Elymus sibiricus, an important species for forage and ecological restoration, remains limited. In this study, transcriptomic and metabolomic approaches uncover the dynamics of phytohormonal signaling in Elymus sibiricus under salt stress. Notably, four hours after exposure to salt, significant activity was observed in the ABA, JA, IAA, and CTK pathways, with ABA, JA, JA-L-Ile, and IAA identified as key mediators in the response of Elymus sibiricus' to salinity. Moreover, SAPK3, Os04g0167900-like, CAT1, MKK2, and MPK12 were identified as potential central regulators within these pathways. The complex interactions between phytohormones and DEGs are crucial for facilitating the adaptation of Elymus sibiricus to saline environments. These findings enhance our understanding of the salt tolerance mechanisms in Elymus sibiricus and provide a foundation for breeding salt-resistant varieties.
了解植物激素信号转导对于阐明植物对环境胁迫的防御机制至关重要。然而，对于重要的饲料和生态恢复物种西伯利亚冰草（Elymus sibiricus）在盐胁迫下植物激素介导的耐受途径的知识仍然有限。在这项研究中，转录组学和代谢组学方法揭示了盐胁迫下西伯利亚冰草中植物激素信号转导的动态。值得注意的是，在暴露于盐后四小时，ABA、JA、IAA 和 CTK 途径的活性显著增加，ABA、JA、JA-L-Ile 和 IAA 被确定为西伯利亚冰草响应盐度的关键介质。此外，SAPK3、Os04g0167900-like、CAT1、MKK2 和 MPK12 被鉴定为这些途径中的潜在核心调节剂。植物激素和 DEGs 之间的复杂相互作用对于促进西伯利亚冰草适应盐环境至关重要。这些发现增强了我们对西伯利亚冰草耐盐机制的理解，并为培育耐盐品种提供了基础。
