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    Use of the Plant Defense Protein Osmotin To Identify Fusarium oxysporum Genes That Control Cell Wall Properties

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    Type
    Article
    Authors
    Lee, H.
    Damsz, B.
    Woloshuk, C. P.
    Bressan, Ray Anthony
    Narasimhan, Meena L.
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Center for Desert Agriculture
    Plant Stress Genomics Research Lab
    Date
    2010-02-26
    Online Publication Date
    2010-02-26
    Print Publication Date
    2010-04-01
    Permanent link to this record
    http://hdl.handle.net/10754/553078
    
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    Abstract
    Fusarium oxysporum is the causative agent of fungal wilt disease in a variety of crops. The capacity of a fungal pathogen such as F. oxysporum f. sp. nicotianae to establish infection on its tobacco (Nicotiana tabacum) host depends in part on its capacity to evade the toxicity of tobacco defense proteins, such as osmotin. Fusarium genes that control resistance to osmotin would therefore reflect coevolutionary pressures and include genes that control mutual recognition, avoidance, and detoxification. We identified FOR (Fusarium Osmotin Resistance) genes on the basis of their ability to confer osmotin resistance to an osmotin-sensitive strain of Saccharomyces cerevisiae. FOR1 encodes a putative cell wall glycoprotein. FOR2 encodes the structural gene for glutamine:fructose-6-phosphate amidotransferase, the first and rate-limiting step in the biosynthesis of hexosamine and cell wall chitin. FOR3 encodes a homolog of SSD1, which controls cell wall composition, longevity, and virulence in S. cerevisiae. A for3 null mutation increased osmotin sensitivity of conidia and hyphae of F. oxysporum f. sp. nicotianae and also reduced cell wall β-1,3-glucan content. Together our findings show that conserved fungal genes that determine cell wall properties play a crucial role in regulating fungal susceptibility to the plant defense protein osmotin.
    Citation
    Use of the Plant Defense Protein Osmotin To Identify Fusarium oxysporum Genes That Control Cell Wall Properties 2010, 9 (4):558 Eukaryotic Cell
    Publisher
    American Society for Microbiology
    Journal
    Eukaryotic Cell
    DOI
    10.1128/EC.00316-09
    PubMed ID
    20190074
    PubMed Central ID
    PMC2863404
    Additional Links
    http://ec.asm.org/cgi/doi/10.1128/EC.00316-09
    ae974a485f413a2113503eed53cd6c53
    10.1128/EC.00316-09
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Center for Desert Agriculture

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