数字农科院2.0

A rhizobacterium-secreted protein induces lateral root development through the IAA34-PUCHI pathway

文献类型： 外文期刊

作者： Yansong Fu;Yunpeng Liu;Yu Chen;Jintao Xiao;Yuanming Xie;Youzhi Miao;Zhihui Xu;Nan Zhang;Weibing Xun;Wei Xuan;Qirong Shen;Ruifu Zhang

作者机构：

关键词： bacillolysin;CP: Plants;IAA34-PUCHI signaling cascade;lateral root development;receptor protein kinase CEPR2;rhizobacterium

期刊名称： Cell Reports

ISSN： 2211-1247

年卷期： 2025 年 44 卷 3 期

页码：

收录情况： SCIE（2025版）

摘要： Lateral roots (LRs) can continuously forage water and nutrients from soil. In Arabidopsis thaliana, LR development depends on a canonical auxin signaling pathway involving the core transcription factors INDOLE-3-ACETIC ACIDs (IAAs) and AUXIN RESPONSE FACTORs (ARFs). In this study, we identified a protein, bacillolysin, secreted by the beneficial rhizobacterium Bacillus velezensis SQR9, that is able to stimulate LR formation of Arabidopsis. The receptor protein kinase C-TERMINALLY ENCODED PEPTIDE RECEPTOR2 (CEPR2) interacts with bacillolysin and plays a critical role in LR development. In the bacillolysin-regulated signaling pathway, the transcriptional repressor IAA34 interacts with PUCHI to activate downstream LATERAL ORGAN BOUNDARIES-DOMAIN33 (LBD33) expression, consequently inducing LR development. This study reveals interkingdom communication via a protein that mediates a novel pathway to induce LR development.

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