气候变化领域集成服务门户(CCPortal): Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient

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DOI	10.1073/pnas.2101254118
	Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient
	Chase A.B.; Weihe C.; Martiny J.B.H.
发表日期	2021
ISSN	00278424
卷号	118 期号:18
英文摘要	Microbial community responses to environmental change are largely associated with ecological processes; however, the potential for microbes to rapidly evolve and adapt remains relatively unexplored in natural environments. To assess how ecological and evolutionary processes simultaneously alter the genetic diversity of a microbiome, we conducted two concurrent experiments in the leaf litter layer of soil over 18 mo across a climate gradient in Southern California. In the first experiment, we reciprocally transplanted microbial communities from five sites to test whether ecological shifts in ecotypes of the abundant bacterium, Curtobacterium, corresponded to past adaptive differentiation. In the transplanted communities, ecotypes converged toward that of the native communities growing on a common litter substrate. Moreover, these shifts were correlated with community-weighted mean trait values of the Curtobacterium ecotypes, indicating that some of the trait variation among ecotypes could be explained by local adaptation to climate conditions. In the second experiment, we transplanted an isogenic Curtobacterium strain and tracked genomic mutations associated with the sites across the same climate gradient. Using a combination of genomic and metagenomic approaches, we identified a variety of nonrandom, parallel mutations associated with transplantation, including mutations in genes related to nutrient acquisition, stress response, and exopolysaccharide production. Together, the field experiments demonstrate how both demographic shifts of previously adapted ecotypes and contemporary evolution can alter the diversity of a soil microbiome on the same timescale. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Adaptation; Curtobacterium; Ecotypes; Experimental evolution; Reciprocal transplant
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179703
作者单位	Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, United States; Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, CA 92093, United States
推荐引用方式 GB/T 7714	Chase A.B.,Weihe C.,Martiny J.B.H.. Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient[J],2021,118(18).
APA	Chase A.B.,Weihe C.,&Martiny J.B.H..(2021).Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient.Proceedings of the National Academy of Sciences of the United States of America,118(18).
MLA	Chase A.B.,et al."Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient".Proceedings of the National Academy of Sciences of the United States of America 118.18(2021).