Mou Minghui, Wang Qijuan, Chen Yanli, Yu Diqiu, Chen Ligang
CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan 666303, China.
College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
Plant Divers. 2020 Jul 14;43(1):71-77. doi: 10.1016/j.pld.2020.06.010. eCollection 2021 Feb.
() plays critical roles in RNA metabolism and plant growth regulation. However, its function in stress-response processes remains largely unknown. Here, we examined the regulatory role of using the mutant and its complementation line under saline conditions. The expression of was repressed by salt treatment at both mRNA and protein levels. After treatment with different NaCl concentrations, the mutants showed increased sensitivity to salinity. This heightened sensitivity was evidenced by decreased germination, reduced root growth, more serious chlorosis, and increased conductivity of the mutants compared with the wild type. Further analysis revealed that regulates the pre-mRNA splicing of several well-characterized marker genes associated with salt stress tolerance. Our data thus imply that may function as a key component in plant response to salt stress by modulating the splicing of salt stress-associated genes.
（）在RNA代谢和植物生长调节中发挥关键作用。然而，其在应激反应过程中的功能仍 largely未知。在此，我们利用 突变体及其互补系在盐胁迫条件下研究了 的调控作用。 在mRNA和蛋白质水平上均受到盐处理的抑制。用不同浓度的NaCl处理后， 突变体对盐胁迫的敏感性增加。与野生型相比，突变体发芽率降低、根生长受抑制、黄化更严重以及电导率增加，这些都证明了这种更高的敏感性。进一步分析表明， 调节几个与耐盐胁迫相关的特征明确的标记基因的前体mRNA剪接。因此，我们的数据表明， 可能通过调节与盐胁迫相关基因的剪接，在植物对盐胁迫的反应中起关键作用。
