渗出液
根际
微生物种群生物学
微生物群
背景(考古学)
叶圈
基因组
生物
植物
细菌
生态学
生物化学
遗传学
生物信息学
基因
古生物学
作者
Kateryna Zhalnina,Katherine Louie,Zhao Hao,Nasim Mansoori,Ulisses Nunes da Rocha,Shaojun Shi,Hee-Jung Cho,Ulaş Karaöz,Dominique Loqué,Benjamin P. Bowen,Mary K. Firestone,Trent Northen,Eoin L. Brodie
出处
期刊:Nature microbiology
日期:2018-03-19
卷期号:3 (4): 470-480
被引量:1269
标识
DOI:10.1038/s41564-018-0129-3
摘要
Like all higher organisms, plants have evolved in the context of a microbial world, shaping both their evolution and their contemporary ecology. Interactions between plant roots and soil microorganisms are critical for plant fitness in natural environments. Given this co-evolution and the pivotal importance of plant–microbial interactions, it has been hypothesized, and a growing body of literature suggests, that plants may regulate the composition of their rhizosphere to promote the growth of microorganisms that improve plant fitness in a given ecosystem. Here, using a combination of comparative genomics and exometabolomics, we show that pre-programmed developmental processes in plants (Avena barbata) result in consistent patterns in the chemical composition of root exudates. This chemical succession in the rhizosphere interacts with microbial metabolite substrate preferences that are predictable from genome sequences. Specifically, we observed a preference by rhizosphere bacteria for consumption of aromatic organic acids exuded by plants (nicotinic, shikimic, salicylic, cinnamic and indole-3-acetic). The combination of these plant exudation traits and microbial substrate uptake traits interact to yield the patterns of microbial community assembly observed in the rhizosphere of an annual grass. This discovery provides a mechanistic underpinning for the process of rhizosphere microbial community assembly and provides an attractive direction for the manipulation of the rhizosphere microbiome for beneficial outcomes. Using comparative genomics and exometabolomics, the authors characterize the chemical composition of plant root exudates and show that this chemical succession is a likely driver of microbial community assembly in the rhizosphere.
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