中国科学院遗传与发育生物学研究所白洋团队取得一项新突破。他们揭示了根系微生物群调控水稻分蘖数。2025年4月22日出版的《细胞》杂志发表了这项成果。
研究团队研究了182个大田条件下的水稻品种的根系微生物群组成和分蘖数，发现根系微生物群组成与水稻分蘖数之间存在显著相关性。利用培养的细菌分离物，研究团队证明了根系微生物群的不同成员可以在实验室和田间条件下调节水稻分蘖。遗传、生化和结构分析表明，由分蘖抑制菌Exiguobacterium R2567产生的cyclo（Leu-Pro）通过与SL受体OsD14结合激活水稻独角胞内酯（SL）信号通路，从而调控分蘖。目前的工作提供了对根系微生物群如何调节关键农艺性状的深入了解，并为通过利用可持续农业中的根系微生物群来优化作物生长提供了一个有希望的策略。
研究人员表示，水稻分蘖是一项重要的农艺性状，受植物遗传和环境因素的共同调控。然而，根系微生物群在水稻分蘖调控中的作用和机制尚未深入研究。
附：英文原文
Title: Root microbiota regulates tiller number in rice
Author: Jingying Zhang, Bing Wang, Haoran Xu, Weidong Liu, Jingwei Yu, Qiuxia Wang, Hong Yu, Jin-Wei Wei, Rui Dai, Jinghang Zhou, Yuhang He, Di Zou, Jinhua Yang, Xinwei Ban, Qingliang Hu, Xiangbing Meng, Yong-Xin Liu, Binglei Wang, Bin Hu, Mingyu Wang, Peiyong Xin, Jinfang Chu, Changsheng Li, Ruben Garrido-Oter, Peng Yu, Aalt Dirk Jan van Dijk, Lemeng Dong, Harro Bouwmeester, Song Gao, Ancheng Huang, Chengcai Chu, Jiayang Li, Yang Bai
Issue&Volume: 2025-04-22
Abstract: Rice tillering is an important agronomic trait regulated by plant genetic and environmental factors. However, the role and mechanism of the root microbiota in modulating rice tillering have not been explored. Here, we examined the root microbiota composition and tiller numbers of 182 genome-sequenced rice varieties grown under field conditions and uncovered a significant correlation between root microbiota composition and rice tiller number. Using cultivated bacterial isolates, we demonstrated that various members of the root microbiota can regulate rice tillering in both laboratory and field conditions. Genetic, biochemical, and structural analyses revealed that cyclo(Leu-Pro), produced by the tiller-inhibiting bacterium Exiguobacterium R2567, activates the rice strigolactone (SL) signaling pathway by binding to the SL receptor OsD14, thus regulating tillering. The present work provides insight into how the root microbiota regulates key agronomic traits and offers a promising strategy for optimizing crop growth by harnessing the root microbiota in sustainable agriculture.
DOI: 10.1016/j.cell.2025.03.033
Source: https://www.cell.com/cell/abstract/S0092-8674(25)00351-4