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Identification of phytotoxins from Botryosphaeria obtusa , a pathogen of black dead arm disease of grapevine

Djoukeng, Jules ; Polli, Suzanna ; Larignon, Philippe ; Abou-Mansour, Eliane

In: European Journal of Plant Pathology, 2009, vol. 124, no. 2, p. 303-308

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    Titre
    • Identification of phytotoxins from Botryosphaeria obtusa , a pathogen of black dead arm disease of grapevine
    Auteur
    • Djoukeng, Jules. Institute of Biology, University of Neuchâtel, rue Emile Argand 11, 2009, Neuchâtel, Switzerland
    • Polli, Suzanna. Institute of Biology, University of Neuchâtel, rue Emile Argand 11, 2009, Neuchâtel, Switzerland
    • Larignon, Philippe. Institut Français de la Vigne et du Vin, Unité Rhône-Méditerranée, Domaine de Donadille, 30230, Rodilhan, France
    • Abou-Mansour, Eliane. Institute of Biology, University of Neuchâtel, rue Emile Argand 11, 2009, Neuchâtel, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • European Journal of Plant Pathology, 2009, vol. 124, no. 2, p. 303-308. Springer Netherlands
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:310786
    Summary
    A bioassay-guided fractionation of a culture filtrate of Botryosphaeria obtusa led to the isolation of four dihydroisocoumarins, named mellein 1, 4-hydroxymellein 2, 7-hydroxymellein 3 and the new 4,7-dihydroxymellein 4. LC-UV-DAD-MS analysis of vine wood infected by B. obtusa revealed the presence of mellein (1). Botryosphaeria obtusa was also able to oxidise wood δ -resveratrol into the dimer delta-viniferin. The structures of isolated phytotoxins were established on the basis of IR, MS, 1D and 2D NMR