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    Oasis desert farming selects environment-specific date palm root endophytic communities and cultivable bacteria that promote resistance to drought

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    10.11111758-2229.12304 Env Microbiol Rep.pdf
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    Type
    Article
    Authors
    Cherif, Hanene
    Marasco, Ramona cc
    Rolli, Eleonora cc
    Ferjani, Raoudha
    Fusi, Marco cc
    Soussi, Asma cc
    Mapelli, Francesca cc
    Blilou, Ikram cc
    Borin, Sara cc
    Boudabous, Abdellatif
    Cherif, Ameur cc
    Daffonchio, Daniele cc
    Ouzari, Hadda
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Bioscience Program
    Environmental Science and Engineering Program
    Extreme Systems Microbiology Lab
    Red Sea Research Center (RSRC)
    Date
    2015-07-21
    Online Publication Date
    2015-07-21
    Print Publication Date
    2015-08
    Permanent link to this record
    http://hdl.handle.net/10754/566005
    
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    Abstract
    Oases are desert-farming agro-ecosystems, where date palm (Phoenix dactyliferaL.) plays a keystone role in offsetting the effects of drought and maintaining a suitable microclimate for agriculture. At present, abundance, diversity and plant growth promotion (PGP) of date palm root-associated bacteria remain unknown. Considering the environmental pressure determined by the water scarcity in the desert environments, we hypothesized that bacteria associated with date palm roots improve plant resistance to drought. Here, the ecology of date palm root endophytes from oases in the Tunisian Sahara was studied with emphasis on their capacity to promote growth under drought. Endophytic communities segregated along a north-south gradient in correlation with geo-climatic parameters. Screening of 120 endophytes indicated that date palm roots select for bacteria with multiple PGP traits. Bacteria rapidly cross-colonized the root tissues of different species of plants, including the original Tunisian date palm cultivar, Saudi Arabian cultivars and Arabidopsis. Selected endophytes significantly increased the biomass of date palms exposed to repeated drought stress periods during a 9-month greenhouse experiment. Overall, results indicate that date palm roots shape endophytic communities that are capable to promote plant growth under drought conditions, thereby contributing an essential ecological service to the entire oasis ecosystem. © 2015 Society for Applied Microbiology and John Wiley & Sons Ltd.
    Citation
    Cherif, H., Marasco, R., Rolli, E., Ferjani, R., Fusi, M., Soussi, A., … Ouzari, H. (2015). Oasis desert farming selects environment-specific date palm root endophytic communities and cultivable bacteria that promote resistance to drought. Environmental Microbiology Reports, 7(4), 668–678. doi:10.1111/1758-2229.12304
    Publisher
    Wiley
    Journal
    Environmental Microbiology Reports
    DOI
    10.1111/1758-2229.12304
    PubMed ID
    26033617
    ae974a485f413a2113503eed53cd6c53
    10.1111/1758-2229.12304
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Bioscience Program; Environmental Science and Engineering Program

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