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    Multiple strategies of plant colonization by beneficial endophytic Enterobacter sp. SA187

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    1462-2920.15747.pdf
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    5.165Mb
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    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Synek, Lukas cc
    Rawat, Anamika cc
    L'Haridon, Floriane
    Weisskopf, Laure cc
    Saad, Maged cc
    Hirt, Heribert cc
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Center for Desert Agriculture
    Hirt Lab
    Plant Science
    KAUST Grant Number
    BAS/1/1062-01-01
    Date
    2021-09-15
    Online Publication Date
    2021-09-15
    Print Publication Date
    2021-10
    Embargo End Date
    2022-09-01
    Submitted Date
    2021-06-15
    Permanent link to this record
    http://hdl.handle.net/10754/670960
    
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    Abstract
    Although many endophytic plant growth-promoting rhizobacteria have been identified, relatively little is still known about the mechanisms by which they enter plants and promote plant growth. The beneficial endophyte Enterobacter sp. SA187 was shown to maintain productivity of crops in extreme agricultural conditions. Here we present that roots of its natural host (Indigofera argentea), alfalfa, tomato, wheat, barley and Arabidopsis are all efficiently colonized by SA187. Detailed analysis of the colonization process in Arabidopsis showed that colonization already starts during seed germination, where seed-coat mucilage supports SA187 proliferation. The meristematic zone of growing roots attracts SA187, allowing epiphytic colonization in the elongation zone. Unlike primary roots, lateral roots are significantly less epiphytically colonized by SA187. Root endophytic colonization was found to occur by passive entry of SA187 at lateral-root bases. However, SA187 also actively penetrates the root epidermis by enzymatic disruption of plant cell wall material. In contrast to roots, endophytic colonization of shoots occurs via stomata, whereby SA187 can actively re-open stomata similarly to pathogenic bacteria. In summary, several entry strategies were identified that allow SA187 to establish itself as a beneficial endophyte in several plant species, supporting it's use as a plant growth-promoting bacterium in agriculture systems. This article is protected by copyright. All rights reserved.
    Citation
    Synek, L., Rawat, A., L’Haridon, F., Weisskopf, L., Saad, M. M., & Hirt, H. (2021). Multiple strategies of plant colonization by beneficial endophytic Enterobacter sp. SA187. Environmental Microbiology. doi:10.1111/1462-2920.15747
    Sponsors
    We thank to I. Blilou (KAUST) for critical reading of the manuscript. This work was supported by the KAUST project No. BAS/1/1062-01-01 to H.H. and by the Swiss National Science Foundation project No. 31003A_179310 to L.W. We thank to developers of FIJI and Inkscape software
    Publisher
    Wiley
    Journal
    Environmental Microbiology
    DOI
    10.1111/1462-2920.15747
    PubMed ID
    34472197
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1111/1462-2920.15747
    ae974a485f413a2113503eed53cd6c53
    10.1111/1462-2920.15747
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Center for Desert Agriculture

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