Djoukeng, Jules Désiré Polli, Suzanna Larignon, Philippe Abou-Mansour, Eliane 2009-01-16 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. application/pdf https://sonar.ch/global/documents/301118 https://sonar.ch/documents/301118/files/10658_2008_Article_9419.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1007/s10658-008-9419-6 info:eu-repo/semantics/openAccess License undefined European Journal of Plant Pathology. - 2009, vol. 124, no. 2, p. 303-308 Black dead arm Botryosphaeria obtusa Grapevine disease Isocoumarins Melleins Phytotoxins info:eu-repo/classification/udc/58 Identification of phytotoxins from Botryosphaeria obtusa, a pathogen of black dead arm disease of grapevine http://purl.org/coar/resource_type/c_6501