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Identification of new salicylic acid signaling regulators for root development and microbiota composition in plants

文献类型： 外文期刊

作者： Jia, Xianqing 1 ; Xu, Zhuang 2 ; Xu, Lei 2 ; Frene, Juan P. 3 ; Gonin, Mathieu 3 ; Wang, Long 2 ; Yu, Jiahong 2 ; Castrillo, Gabriel 3 ; Yi, Keke 2 ;

作者机构： 1.Northwest Univ, Minist Educ, Coll Life Sci, Key Lab Resource Biol & Biotechnol Western China,P, Xian 710069, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China

3.Univ Nottingham, Sch Biosci, Loughborough LE12 5RD, England

关键词： gene regulatory network; microbiota colonization; root growth; ROS; salicylic acid

期刊名称：JOURNAL OF INTEGRATIVE PLANT BIOLOGY （ 影响因子：9.3； 五年影响因子：10.8 ）

ISSN： 1672-9072

年卷期： 2025 年 67 卷 2 期

页码：

收录情况： SCI

摘要： Besides playing a crucial role in plant immunity via the nonexpressor of pathogenesis-related (NPR) proteins, increasing evidence shows that salicylic acid (SA) can also regulate plant root growth. However, the transcriptional regulatory network controlling this SA response in plant roots is still unclear. Here, we found that NPR1 and WRKY45, the central regulators of SA response in rice leaves, control only a reduced sector of the root SA signaling network. We demonstrated that SA attenuates root growth via a novel NPR1/WRKY45-independent pathway. Furthermore, using regulatory network analysis and mutant characterization, we identified a set of new NPR1/WRKY45-independent regulators that conservedly modulate the root development and root-associated microbiota composition in both Oryza sativa (monocot) and Arabidopsis thaliana (dicot) in response to SA. Our results established the SA signaling as a central element regulating plant root functions under ecologically relevant conditions. These results provide new insights to understand how regulatory networks control plant responses to abiotic and biotic stresses.

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