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    Native and Invading Yellow Starthistle (Centaurea solstitialis) Microbiomes Differ in Composition and Diversity of Bacteria

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    Name:
    mSphere-2019-Lu-Irving-e00088- ...
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    Author
    Lu-Irving, Patricia
    Harenčár, Julia G
    Sounart, Hailey
    Welles, Shana R
    Swope, Sarah M
    Baltrus, David A
    Dlugosch, Katrina M
    Affiliation
    Univ Arizona, Dept Ecol & Evolut Biol
    Univ Arizona, Sch Plant Sci
    Issue Date
    2019-03-06
    Keywords
    bacterial communities
    invasive species
    phyllosphere
    plant microbiomes
    rhizosphere
    species introductions
    
    Metadata
    Show full item record
    Publisher
    AMER SOC MICROBIOLOGY
    Citation
    Lu-Irving, P., Harenčár, J. G., Sounart, H., Welles, S. R., Swope, S. M., Baltrus, D. A., & Dlugosch, K. M. (2019). Native and invading yellow starthistle (Centaurea solstitialis) microbiomes differ in composition and diversity of bacteria. mSphere, 4(2), e00088-19.
    Journal
    MSPHERE
    Rights
    Copyright © 2019 Lu-Irving et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.
    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
    Invasive species could benefit from being introduced to locations with more favorable species interactions, including the loss of enemies, the gain of mutualists, or the simplification of complex interaction networks. Microbiomes are an important source of species interactions with strong fitness effects on multicellular organisms, and these interactions are known to vary across regions. The highly invasive plant yellow starthistle (Centaurea solstitialis) has been shown to experience more favorable microbial interactions in its invasions of the Americas, but the microbiome that must contribute to this variation in interactions is unknown. We sequenced amplicons of 16S rRNA genes to characterize bacterial community compositions in the phyllosphere, ectorhizosphere, and endorhizosphere of yellow starthistle plants from seven invading populations in California, USA, and eight native populations in Europe. We tested for the differentiation of microbiomes by geography, plant compartment, and plant genotype. Bacterial communities differed significantly between native and invading plants within plant compartments, with consistently lower diversity in the microbiome of invading plants. The diversity of bacteria in roots was positively correlated with plant genotype diversity within both ranges, but this relationship did not explain microbiome differences between ranges. Our results reveal that these invading plants are experiencing either a simplified microbial environment or simplified microbial interactions as a result of the dominance of a few taxa within their microbiome. Our findings highlight several alternative hypotheses for the sources of variation that we observe in invader microbiomes and the potential for altered bacterial interactions to facilitate invasion success.IMPORTANCE Previous studies have found that introduced plants commonly experience more favorable microbial interactions in their non-native range, suggesting that changes to the microbiome could be an important contributor to invasion success. Little is known about microbiome variation across native and invading populations, however, and the potential sources of more favorable interactions are undescribed. Here, we report one of the first microbiome comparisons of plants from multiple native and invading populations, in the noxious weed yellow starthistle. We identify clear differences in composition and diversity of microbiome bacteria. Our findings raise new questions about the sources of these differences, and we outline the next generation of research that will be required to connect microbiome variation to its potential role in plant invasions.
    Note
    Open access journal
    ISSN
    2379-5042
    PubMed ID
    30842267
    DOI
    10.1128/mSphere.00088-19
    Version
    Final published version
    Sponsors
    NIH COBRE grant [P30GM103324]; USDA [2015-67013-23000]
    ae974a485f413a2113503eed53cd6c53
    10.1128/mSphere.00088-19
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