Glutamic acid reshapes the plant microbiota to protect plants against pathogens

Microbiome

Man-Jeong Paik¹  Chang-Wook Jeon²  Yong Bok Lee²  Gyeongjun Cho²  Da-Ran Kim³  Youn-Sig Kwak⁴  Linda S. Thomashow⁵  David M. Weller⁵ 

[1] College of Pharmacy, Sunchon National University, 65980, Suncheon, Republic of Korea;Division of Applied Life Science (BK 21 plus) and IALS, Gyeongsang National University, 52828, Jinju, Republic of Korea;RILS, Gyeongsang National University, 52828, Jinju, Republic of Korea;RILS, Gyeongsang National University, 52828, Jinju, Republic of Korea;Division of Applied Life Science (BK 21 plus) and IALS, Gyeongsang National University, 52828, Jinju, Republic of Korea;Department of Plant Medicine, Gyeongsang National University, 52828, Jinju, Republic of Korea;US Department of Agriculture, Agricultural Research Service, Wheat Health, Genetics and Quality Research Unit, 99164-6430, Pullman, WA, USA;

关键词: Microbiome engineering;    Glutamic acid;    Streptomyces;    Phytobiome;   

DOI  :  10.1186/s40168-021-01186-8

来源: Springer

【 摘 要 】

BackgroundPlants in nature interact with other species, among which are mutualistic microorganisms that affect plant health. The co-existence of microbial symbionts with the host contributes to host fitness in a natural context. In turn, the composition of the plant microbiota responds to the environment and the state of the host, raising the possibility that it can be engineered to benefit the plant. However, technology for engineering the structure of the plant microbiome is not yet available.ResultsThe loss of diversity and reduction in population density of Streptomyces globisporus SP6C4, a core microbe, was observed coincident with the aging of strawberry plants. Here, we show that glutamic acid reshapes the plant microbial community and enriches populations of Streptomyces, a functional core microbe in the strawberry anthosphere. Similarly, in the tomato rhizosphere, treatment with glutamic acid increased the population sizes of Streptomyces as well as those of Bacillaceae and Burkholderiaceae. At the same time, diseases caused by species of Botrytis and Fusarium were significantly reduced in both habitats. We suggest that glutamic acid directly modulates the composition of the microbiome community.ConclusionsMuch is known about the structure of plant-associated microbial communities, but less is understood about how the community composition and complexity are controlled. Our results demonstrate that the intrinsic level of glutamic acid in planta is associated with the composition of the microbiota, which can be modulated by an external supply of a biostimulant.Cg3iRbBtvJ_v2-WLHm3hSUVideo Abstract

【 授权许可】

CC BY