The transcription factor GmbZIP131 enhances soybean salt tolerance by regulating flavonoid biosynthesis
文献类型： 外文期刊
作者： Ni, Xiaoli 1 ; Wang, Yiang 1 ; Dai, Liqiang 1 ; Jiang, Kedi 1 ; Zeng, Shuting 1 ; Huang, Yixin 1 ; Zhou, Yiting 1 ; Duan, Lihui 1 ; Bian, Cheng 1 ; Liu, Qi 1 ; Sun, Hong 2 ; Shen, Jinbo 3 ; Wang, Shang 1 ; Pi, Erxu 1 ;
作者机构： 1.Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, Hangzhou, Peoples R China
3.Zhejiang A&F Univ, Natl Key Lab Dev & Utilizat Forest Food Resources, Hangzhou, Peoples R China
期刊名称：PLANT PHYSIOLOGY （ 影响因子：6.9； 五年影响因子：7.7 ）
ISSN： 0032-0889
年卷期： 2025 年 197 卷 3 期
页码：
收录情况： SCI
摘要： Detoxifying reactive oxygen species (ROS) that accumulate under saline conditions is crucial for plant salt tolerance. The salt overly sensitive (SOS) pathway functions upstream, while flavonoids act downstream, in ROS scavenging under salt stress. However, the potential crosstalk between the SOS pathway and flavonoids in regulating salt stress responses and the associated mechanisms remain largely unexplored. To assess this possible connection, we investigated the role of the soybean (Glycine max) transcription factor GmbZIP131 in enhancing salt tolerance by modulating ROS homeostasis through flavonoid biosynthesis. GmSOS2 like (GmSOS2L), a key component of the SOS pathway, phosphorylates and activates GmbZIP131, thus promoting GmICHG (isoflavone conjugate-specific beta-glucosidase) expression. Metabolic profiling of transgenic soybean lines revealed that GmbZIP131 upregulates the levels of lupiwighteone and its 7-glucoside precursor, likely processed by GmICHG. Furthermore, overexpression of GmSOS2L, GmbZIP131, or GmICHG enhances the accumulation of lupiwighteone and its 7-glucoside precursor, as well as soybean salt stress tolerance. Our findings reveal a GmSOS2L-GmbZIP131-GmICHG signaling cascade that enhances soybean salt tolerance through flavonoid accumulation. This research uncovers a mechanism linking the SOS pathway to flavonoid metabolism, offering insights for improving soybean stress tolerance and advancing the molecular breeding of salt-tolerant varieties. The GmbZIP131 enhances soybean salt tolerance by regulating flavonoid biosynthesis and reactive oxygen species scavenging, offering insights for improving crop resilience to salinity stress.
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