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Front Genet. 2018 Aug 14;9:312. doi: 10.3389/fgene.2018.00312. eCollection 2018.

Construction and Characterization of Synthetic Bacterial Community for Experimental Ecology and Evolution.

Frontiers in genetics

Johannes Cairns, Roosa Jokela, Jenni Hultman, Manu Tamminen, Marko Virta, Teppo Hiltunen

Affiliations

  1. Department of Microbiology, University of Helsinki, Helsinki, Finland.
  2. Department of Biology, University of Turku, Turku, Finland.

PMID: 30154827 PMCID: PMC6102323 DOI: 10.3389/fgene.2018.00312

Abstract

Experimental microbial ecology and evolution have yielded foundational insights into ecological and evolutionary processes using simple microcosm setups and phenotypic assays with one- or two-species model systems. The fields are now increasingly incorporating more complex systems and exploration of the molecular basis of observations. For this purpose, simplified, manageable and well-defined multispecies model systems are required that can be easily investigated using culturing and high-throughput sequencing approaches, bridging the gap between simpler and more complex synthetic or natural systems. Here we address this need by constructing a completely synthetic 33 bacterial strain community that can be cultured in simple laboratory conditions. We provide whole-genome data for all the strains as well as metadata about genomic features and phenotypic traits that allow resolving individual strains by amplicon sequencing and facilitate a variety of envisioned mechanistic studies. We further show that a large proportion of the strains exhibit coexistence in co-culture over serial transfer for 48 days in the absence of any experimental manipulation to maintain diversity. The constructed bacterial community can be a valuable resource in future experimental work.

Keywords: experimental evolution; microbial community; model system; synthetic ecology; whole-genome sequencing

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