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Model communities hint at promiscuous metabolic linkages between ubiquitous free-living freshwater bacteria

  • Genome streamlining is frequently observed in free-living aquatic microorganisms and results in physiological dependencies between microorganisms. However, we know little about the specificity of these microbial associations. In order to examine the specificity and extent of these associations, we established mixed cultures from three different freshwater environments and analyzed the cooccurrence of organisms using a metagenomic time series. Free-living microorganisms with streamlined genomes lacking multiple biosynthetic pathways showed no clear recurring pattern in their interaction partners. Free-living freshwater bacteria form promiscuous cooperative associations. This notion contrasts with the well-documented high specificities of interaction partners in host-associated bacteria. Considering all data together, we suggest that highly abundant free-living bacterial lineages are functionally versatile in their interactions despite their distinct streamlining tendencies at the single-cell level. This metabolic versatilityGenome streamlining is frequently observed in free-living aquatic microorganisms and results in physiological dependencies between microorganisms. However, we know little about the specificity of these microbial associations. In order to examine the specificity and extent of these associations, we established mixed cultures from three different freshwater environments and analyzed the cooccurrence of organisms using a metagenomic time series. Free-living microorganisms with streamlined genomes lacking multiple biosynthetic pathways showed no clear recurring pattern in their interaction partners. Free-living freshwater bacteria form promiscuous cooperative associations. This notion contrasts with the well-documented high specificities of interaction partners in host-associated bacteria. Considering all data together, we suggest that highly abundant free-living bacterial lineages are functionally versatile in their interactions despite their distinct streamlining tendencies at the single-cell level. This metabolic versatility facilitates interactions with a variable set of community members.show moreshow less

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Author details:Sarahi L. GarciaORCiD, Moritz Buck, Joshua J. HamiltonORCiD, Christian WurzbacherGND, Hans-Peter GrossartORCiDGND, Katherine D. McMahonORCiD, Alexander EilerORCiD
URN:urn:nbn:de:kobv:517-opus4-427299
DOI:https://doi.org/10.25932/publishup-42729
Title of parent work (German):Postprints der Universität Potsdam Mathematisch-Naturwissenschaftliche Reihe
Publication series (Volume number):Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (714)
Publication type:Postprint
Language:English
Date of first publication:2019/05/28
Publication year:2018
Publishing institution:Universität Potsdam
Release date:2019/05/28
Tag:community; interactions; metagenomics; microbial ecology; mixed cultures; promiscuous
Issue:714
Number of pages:8
Source:mSphere 3 (2018) Nr. 3, Art. e00202-18 DOI: 10.1128/mSphere.00202-18
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät
DDC classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
Peer review:Referiert
Publishing method:Open Access
License (German):License LogoCC-BY - Namensnennung 4.0 International
External remark:Bibliographieeintrag der Originalveröffentlichung/Quelle
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