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

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

doi:10.1007/s10658-008-9419-6

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Journal article

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

Université de Fribourg

Djoukeng, Jules Désiré Institute of Biology, University of Neuchâtel, Switzerland
Polli, Suzanna Institute of Biology, University of Neuchâtel, Switzerland
Larignon, Philippe Institut Français de la Vigne et du Vin, Unité Rhône-Méditerranée, Rodilhan, France
Abou-Mansour, Eliane Institute of Biology, University of Neuchâtel, Switzerland - Plant Biology Department, University of Fribourg, Switzerland

16.01.2009

Published in:

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

English 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.

Faculty

Faculté des sciences et de médecine

Department

Département de Biologie

Language