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    Genome Insights of the Plant-Growth Promoting Bacterium Cronobacter muytjensii JZ38 With Volatile-Mediated Antagonistic Activity Against Phytophthora infestans.

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    Type
    Article
    Authors
    Eida, Abdul Aziz cc
    Bougouffa, Salim cc
    L’Haridon, Floriane
    Alam, Intikhab
    Weisskopf, Laure
    Bajic, Vladimir B. cc
    Saad, Maged M.
    Hirt, Heribert cc
    KAUST Department
    Applied Mathematics and Computational Science Program
    Bioinformatics
    Biological and Environmental Sciences and Engineering (BESE) Division
    Bioscience Program
    Computational Bioscience Research Center (CBRC)
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Desert Agriculture Initiative
    Hirt Lab
    Plant Science
    Date
    2020-03-11
    Submitted Date
    2019-07-12
    Permanent link to this record
    http://hdl.handle.net/10754/662361
    
    Metadata
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    Abstract
    Salinity stress is a major challenge to agricultural productivity and global food security in light of a dramatic increase of human population and climate change. Plant growth promoting bacteria can be used as an additional solution to traditional crop breeding and genetic engineering. In the present work, the induction of plant salt tolerance by the desert plant endophyte Cronobacter sp. JZ38 was examined on the model plant Arabidopsis thaliana using different inoculation methods. JZ38 promoted plant growth under salinity stress via contact and emission of volatile compounds. Based on the 16S rRNA and whole genome phylogenetic analysis, fatty acid analysis and phenotypic identification, JZ38 was identified as Cronobacter muytjensii and clearly separated and differentiated from the pathogenic C. sakazakii. Full genome sequencing showed that JZ38 is composed of one chromosome and two plasmids. Bioinformatic analysis and bioassays revealed that JZ38 can grow under a range of abiotic stresses. JZ38 interaction with plants is correlated with an extensive set of genes involved in chemotaxis and motility. The presence of genes for plant nutrient acquisition and phytohormone production could explain the ability of JZ38 to colonize plants and sustain plant growth under stress conditions. Gas chromatography–mass spectrometry analysis of volatiles produced by JZ38 revealed the emission of indole and different sulfur volatile compounds that may play a role in contactless plant growth promotion and antagonistic activity against pathogenic microbes. Indeed, JZ38 was able to inhibit the growth of two strains of the phytopathogenic oomycete Phytophthora infestans via volatile emission. Genetic, transcriptomic and metabolomics analyses, combined with more in vitro assays will provide a better understanding the highlighted genes’ involvement in JZ38’s functional potential and its interaction with plants. Nevertheless, these results provide insight into the bioactivity of C. muytjensii JZ38 as a multi-stress tolerance promoting bacterium with a potential use in agriculture.
    Citation
    Eida, A. A., Bougouffa, S., L’Haridon, F., Alam, I., Weisskopf, L., Bajic, V. B., … Hirt, H. (2020). Genome Insights of the Plant-Growth Promoting Bacterium Cronobacter muytjensii JZ38 With Volatile-Mediated Antagonistic Activity Against Phytophthora infestans. Frontiers in Microbiology, 11. doi:10.3389/fmicb.2020.00369
    Sponsors
    We would like to thank all members of the Hirt lab, CDA management team, and KAUST Core Labs for the technical assistance and for their help in many aspects of this work. We would also like to thank Abhishek Anand for his input on the GC/MS analysis and Dr. Cristina Andrés Barrao for her input on the fatty acid analysis.
    Publisher
    Frontiers Media SA
    Journal
    Frontiers in Microbiology
    DOI
    10.3389/fmicb.2020.00369
    PubMed Central ID
    PMC7078163
    Additional Links
    https://www.frontiersin.org/article/10.3389/fmicb.2020.00369/full
    Relations
    Is Supplemented By:
    • [Bioproject]
      Title: Endophytic bacterial strains isolated from roots of desert plantsPublication Date: 2016-10-05. bioproject: PRJNA345401 Handle: 10754/666556
    ae974a485f413a2113503eed53cd6c53
    10.3389/fmicb.2020.00369
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Bioscience Program; Applied Mathematics and Computational Science Program; Computational Bioscience Research Center (CBRC); Desert Agriculture Initiative; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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