Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2101254118 |
Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient | |
Alexander B. Chase; Claudia Weihe; Jennifer B. H. Martiny | |
2021-05-04 | |
发表期刊 | Proceedings of the National Academy of Sciences
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出版年 | 2021 |
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. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/324995 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Alexander B. Chase,Claudia Weihe,Jennifer B. H. Martiny. Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Alexander B. Chase,Claudia Weihe,&Jennifer B. H. Martiny.(2021).Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient.Proceedings of the National Academy of Sciences. |
MLA | Alexander B. Chase,et al."Adaptive differentiation and rapid evolution of a soil bacterium along a climate gradient".Proceedings of the National Academy of Sciences (2021). |
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