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    The Date Palm Tree Rhizosphere Is a Niche for Plant Growth Promoting Bacteria in the Oasis Ecosystem

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    Type
    Article
    Authors
    Ferjani, Raoudha
    Marasco, Ramona cc
    Rolli, Eleonora cc
    Cherif, Hanene
    Cherif, Ameur cc
    Gtari, Maher cc
    Boudabous, Abdellatif
    Daffonchio, Daniele cc
    Ouzari, Hadda-Imene
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Bioscience Program
    Extreme Systems Microbiology Lab
    Red Sea Research Center (RSRC)
    Date
    2015-03-20
    Online Publication Date
    2015-03-20
    Print Publication Date
    2015
    Permanent link to this record
    http://hdl.handle.net/10754/348499
    
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    Abstract
    In arid ecosystems environmental factors such as geoclimatic conditions and agricultural practices are of major importance in shaping the diversity and functionality of plant-associated bacterial communities. Assessing the influence of such factors is a key to understand (i) the driving forces determining the shape of root-associated bacterial communities and (ii) the plant growth promoting (PGP) services they provide. Desert oasis environment was chosen as model ecosystem where agriculture is possible by the microclimate determined by the date palm cultivation. The bacterial communities in the soil fractions associated with the root system of date palms cultivated in seven oases in Tunisia were assessed by culture-independent and dependent approaches. According to 16S rRNA gene PCR-DGGE fingerprinting, the shapes of the date palm rhizosphere bacterial communities correlate with geoclimatic features along a north-south aridity transect. Despite the fact that the date palm root bacterial community structure was strongly influenced by macroecological factors, the potential rhizosphere services reflected in the PGP traits of isolates screened in vitro were conserved among the different oases. Such services were exerted by the 83% of the screened isolates. The comparable numbers and types of PGP traits indicate their importance in maintaining the plant functional homeostasis despite the different environmental selection pressures.
    Citation
    The Date Palm Tree Rhizosphere Is a Niche for Plant Growth Promoting Bacteria in the Oasis Ecosystem 2015, 2015:1 BioMed Research International
    Publisher
    Hindawi Limited
    Journal
    BioMed Research International
    DOI
    10.1155/2015/153851
    PubMed ID
    25866759
    PubMed Central ID
    PMC4383278
    Additional Links
    http://www.hindawi.com/journals/bmri/2015/153851/
    ae974a485f413a2113503eed53cd6c53
    10.1155/2015/153851
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC); Bioscience Program

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