Soybean PHR1-regulated low phosphorus-responsive GmRALF22 promotes phosphate uptake by stimulating the expression of GmPTs
文献类型： 外文期刊
作者： Li, Fangjian 1 ; Mai, Cuishan 1 ; Liu, Yan 1 ; Deng, Yaru 1 ; Wu, Lixia 1 ; Zheng, Xinni 1 ; He, Huijing 1 ; Huang, Yilin 1 ; Luo, Zhenxi 1 ; Wang, Jinxiang 1 ;
作者机构： 1.South China Agr Univ, Root Biol Ctr, Guangzhou 510642, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Maize & Featured Upland Crops, Hangzhou 310004, Peoples R China
3.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China
4.Key Lab Agr & Rural Pollut Control & Environm Safe, Guangzhou 510642, Peoples R China
关键词： GmRALF22; GmPHR1; Low phosphorus stress; GmPTs; Soybean
期刊名称：PLANT SCIENCE （ 影响因子：4.2； 五年影响因子：4.9 ）
ISSN： 0168-9452
年卷期： 2024 年 348 卷
页码：
收录情况： SCI
摘要： Phosphorus (P) is an essential macronutrient for plant growth and development. Rapid alkalisation factors (RALFs) play crucial roles in plant responses to nutrient stress. However, the functions of Glycine max RALFs (GmRALFs) under low P (LP) stress remain elusive. In this study, we first identified 27 GmRALFs in soybean and then revealed that, under LP conditions, GmRALF10, GmRALF11, and GmRALF22 were induced in both roots and leaves, whereas GmRALF5, GmRALF6, and GmRALF25 were upregulated in leaves. Furthermore, GmRALF22 was found to be the target gene of the transcription factor GmPHR1, which binds to the P1BS cis-element in the promoter of GmRALF22 via electrophoretic mobility shift assay and dual-luciferase experiments. Colonisation with Bacillus subtilis which delivers GmRALF22, increases the expression of the high-affinity phosphate (Pi) transporter genes GmPT2, GmPT11, GmPT13, and GmPT14, thus increasing the total amount of dry matter and soluble Pi in soybeans. RNA sequencing revealed that GmRALF22 alleviates LP stress by regulating the expression of jasmonic acid- (JA-), salicylic acid- (SA-), and immune-related genes. Finally, we verified that GmRALF22 was dependent on FERONIA (FER) to promote Arabidopsis primary root growth under LP conditions. In summary, the GmPHR1-GmRALF22 module positively regulates soybean tolerance to LP.
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