European Journal of Plant Pathology (2009) 124, 303-308

Jules Désiré Djoukeng, Suzanna Polli, Philippe Larignon and Eliane Abou-Mansour (2009)
Identification of phytotoxins from Botryosphaeria obtusa, a pathogen of black dead arm disease of grapevine
European Journal of Plant Pathology 124 (2), 303-308
Abstract: 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 delta -resveratrol into the dimer delta-viniferin. The structures of isolated phytotoxins were established on the basis of IR, MS, 1D and 2D NMR.
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Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Diplodia seriata	Grapevine (Vitis)