Cell:细菌“好朋友”帮助植物抵御真菌危害

健康的植物根系同时定殖着细菌、真菌和卵菌,这些微生物如何相互作用以及对植物健康的影响尚不清楚;
扩增子测序检测了拟南芥根际微生物群落,网络分析发现了细菌和丝状真核微生物呈负相关;
无菌的拟南芥重组实验发现细菌与真菌、卵菌互作有利于拟南芥生存,细菌在塑造真菌和卵菌群落结构时起重要作用;
细菌对植物的保护作用具有冗余性,多个进化分枝的细菌都有助于植物抵抗真菌,表明健康的植物生长需要跨界的微生物群落平衡。
延伸阅读
Cell [IF:31.398]

Microbial Interkingdom Interactions in Roots Promote Arabidopsis Survival

根系微生物的跨界互作促进拟南芥存活

11-01, Article, 10.1016/j.cell.2018.10.020more

Abstract:
Roots of healthy plants are inhabited by soil-derived bacteria, fungi, and oomycetes that have evolved independently in distinct kingdoms of life. How these microorganisms interact and to what extent those interactions affect plant health are poorly understood. We examined root-associated microbial communities from three Arabidopsis thaliana populations and detected mostly negative correlations between bacteria and filamentous microbial eukaryotes. We established microbial culture collections for reconstitution experiments using germ-free A. thaliana. In plants inoculated with mono- or multi-kingdom synthetic microbial consortia, we observed a profound impact of the bacterial root microbiota on fungal and oomycetal community structure and diversity. We demonstrate that the bacterial microbiota is essential for plant survival and protection against root-derived filamentous eukaryotes. Deconvolution of 2,862 binary bacterial-fungal interactions ex situ, combined with community perturbation experiments in planta, indicate that biocontrol activity of bacterial root commensals is a redundant trait that maintains microbial interkingdom balance for plant health.

First Authors:
Paloma Durán,Thorsten Thiergart

Correspondence Authors:
Paul Schulze-Lefert,Stéphane Hacquard

All Authors:
Paloma Durán,Thorsten Thiergart,Ruben Garrido-Oter,Matthew Agler,Eric Kemen,Paul Schulze-Lefert,Stéphane Hacquard