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    Author(s): Jun Fan; Casey Crooks; Gary Creissen; Lionel Hill; Shirley Fairhurst; Peter Doerner; Chris Lamb
    Date: 2011
    Source: Science. Vol. 331, no. 6021 (Mar. 4, 2011): p. 1185-1188.
    Publication Series: Scientific Journal (JRNL)
    PDF: View PDF  (208.31 KB)

    Description

    Most plant-microbe interactions do not result in disease; natural products restrict non-host pathogens. We found that sulforaphane (4-methylsulfinylbutyl isothiocyanate), a natural product derived from aliphatic glucosinolates, inhibits growth in Arabidopsis of non-host Pseudomonas bacteria in planta. Multiple sax genes (saxCAB/F/D/G) were identified in Pseudomonas species virulent on Arabidopsis. These sax genes are required to overwhelm isothiocyanate-based defenses and facilitate a disease outcome, especially in the young leaves critical for plant survival. Introduction of saxCAB genes into non-host strains enabled them to overcome these Arabidopsis defenses. Our study shows that aliphatic isothiocyanates, previously shown to limit damage by herbivores, are also crucial, robust, and developmentally regulated defenses that underpin non-host resistance in the Arabidopsis-Pseudomonas pathosystem.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Fan, Jun; Crooks, Casey; Creissen, Gary; Hill, Lionel; Fairhurst, Shirley; Doerner, Peter; Lamb, Chris. 2011. Pseudomonas sax genes overcome aliphatic isothiocyanate-mediated non-host resistance in Arabidopsis. Science. Vol. 331, no. 6021 (Mar. 4, 2011): p. 1185-1188.

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    Keywords

    Phytopathogenic bacteria, bacterial diseases of plants, pathogenic bacteria, disease susceptibility, Arabidopsis, biodegradation, bacteria, microorganisms, molecular genetics, isothiocyanates, plants, disease resistance, pest resistance, plant chemical defenses, Pseudomonas sax, resistance to decay, phytopathogenic bacteria, biocides, aliphatic isothiocyanate, sulforaphane, genetic analysis

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