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    A bacterial filter protects and structures the gut microbiome of an insect

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    ismej2015264a.pdf
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    Author
    Lanan, Michele Caroline
    Pos Rodrigues, Pedro Augusto
    Agellon, Al
    Jansma, Patricia
    Wheeler, Diana Esther
    Affiliation
    Graduate Interdisciplinary Program in Entomology and Insect Science, University of Arizona
    School of Animal and Comparative Biomedical Sciences, University of Arizona
    Department of Neuroscience, University of Arizona
    Department of Entomology, University of Arizona
    Issue Date
    2016-08
    
    Metadata
    Show full item record
    Publisher
    NATURE PUBLISHING GROUP
    Citation
    Lanan MC, Rodrigues PAP, Agellon A, Jansma P, Wheeler DE. A bacterial filter protects and structures the gut microbiome of an insect. The ISME Journal. 2016;10(8):1866-1876. doi:10.1038/ismej.2015.264.
    Journal
    The ISME Journal
    Rights
    © 2016 International Society for Microbial Ecology. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Associations with symbionts within the gut lumen of hosts are particularly prone to disruption due to the constant influx of ingested food and non-symbiotic microbes, yet we know little about how partner fidelity is maintained. Here we describe for the first time the existence of a gut morphological filter capable of protecting an animal gut microbiome from disruption. The proventriculus, a valve located between the crop and midgut of insects, functions as a micro-pore filter in the Sonoran Desert turtle ant (Cephalotes rohweri), blocking the entry of bacteria and particles ⩾0.2 μm into the midgut and hindgut while allowing passage of dissolved nutrients. Initial establishment of symbiotic gut bacteria occurs within the first few hours after pupation via oral–rectal trophallaxis, before the proventricular filter develops. Cephalotes ants are remarkable for having maintained a consistent core gut microbiome over evolutionary time and this partner fidelity is likely enabled by the proventricular filtering mechanism. In addition, the structure and function of the cephalotine proventriculus offers a new perspective on organismal resistance to pathogenic microbes, structuring of gut microbial communities, and development and maintenance of host–microbe fidelity both during the animal life cycle and over evolutionary time.
    Note
    Open access.
    PubMed ID
    26872040
    PubMed Central ID
    5029173
    DOI
    10.1038/ismej.2015.264
    Version
    Final published version
    Sponsors
    This work was funded by NIH grant 5K12GM000708-13. PAPR received support from NSF Grant 0604067 to DEW.
    Additional Links
    http://www.nature.com/ismej/journal/v10/n8/full/ismej2015264a.html
    ae974a485f413a2113503eed53cd6c53
    10.1038/ismej.2015.264
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