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    Cell. 1992 Jul 10;70(1):21-30.

    Elicitor- and wound-induced oxidative cross-linking of a proline-rich plant cell wall protein: a novel, rapid defense response.

    Source

    Plant Biology Laboratory, Salk Institute for Biological Studies, La Jolla, California 92037.

    Abstract

    Treatment of bean or soybean cells with fungal elicitor or glutathione causes a rapid insolubilization of preexisting (hydroxy)proline-rich structural proteins in the cell wall. This insolubilization, which involves H2O2-mediated oxidative cross-linking, is initiated within 2 min and is complete within 10 min under optimal conditions, and hence, precedes the expression of transcription-dependent defenses. Cross-linking is also under developmental control during hypocotyl growth and in tissues subject to mechanical stress such as the stem-petiole junction. Stimulus-dependent oxidative cross-linking of wall structural proteins is a novel site of cellular regulation with potentially important functions in cell maturation and toughening of cell walls in the initial stages of plant defense.

    PMID:
    1623521
    [PubMed - indexed for MEDLINE]

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