Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/219
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Type: Journal article
Title: Phenolic and heterocyclic metabolite profiles of the grapevine pathogen Eutypa lata
Author: Mahoney, N.
Lardner, R.
Molyneux, R.
Scott, E.
Smith, L.
Schoch, T.
Citation: Phytochemistry, 2003; 64(2):475-484
Publisher: Pergamon-Elsevier Science Ltd
Issue Date: 2003
ISSN: 0031-9422
1873-3700
Statement of
Responsibility: 
Noreen Mahoney, Richard Lardner, Russell J. Molyneux, Eileen S. Scott, Leverett R. Smith and Thomas K. Schoch
Abstract: The ascomycete Eutypa lata is the causative agent of eutypa dieback in grapevines, a serious economic problem in major wine grape producing areas. In order to develop a predictive, non-destructive assay for early detection of fungal infection, the phenolic metabolite profiles of 11 strains of E. lata grown on four different artificial growth media were analyzed by HPLC and their variability compared with growth on Cabernet Sauvignon grapevine wood and wood extracts. Six compounds were generally produced in significant amounts, namely eutypinol, eulatachromene, and eutypine and its benzofuran cyclization product, together with siccayne and eulatinol. The two most widely distributed and abundant metabolites were eutypinol and eulatachromene, which were present in 8 of the strains grown on grapewood aqueous extract fortified with sucrose. Metabolite production on grapevine extract was greatly enhanced relative to the artificial media, indicating that this native substrate provides optimal conditions and a more representative profile of the metabolites produced in the natural disease state. The primary metabolites were tested in a grapeleaf disc bioassay to establish their relative toxicity. Neither eutypinol nor siccayne were phytotoxic; eulatachromene, eulatinol, eutypine, and the benzofuran exhibited necrotic effects in the bioassay. The results indicate that eutypa dieback may be caused by several E. lata metabolites rather than a single compound.
Keywords: Vitis vinifera; Vitaceae; Grapes; Eutypa lata; Dying-arm disease; Dieback; Eutyposis; Vine decline; Bioassay
RMID: 0020030021
DOI: 10.1016/S0031-9422(03)00337-6
Appears in Collections:Agriculture, Food and Wine publications

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