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Food Microbiol

Title:		Effects of the origins of Botrytis cinerea on earthy aromas from grape broth media further inoculated with Penicillium expansum
Author(s):		Morales-Valle H; Silva LC; Paterson RR; Venancio A; Lima N;
Address:		"Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. hmorales@deb.uminho.pt"
Journal Title:		Food Microbiol
Year:		2011
Volume:		20110227
Issue:		5
Page Number:		1048 - 1053
DOI:		10.1016/j.fm.2011.02.005
ISSN/ISBN:		1095-9998 (Electronic) 0740-0020 (Linking)
Abstract:		"Earthy 'off' aromas from wine and grape juice are highly detrimental to the production of quality grape products. These volatile compounds are produced on grapes by Botrytis cinerea, Penicillium expansum and/or a combination of P. expansum and B. cinerea strains. B. cinerea strains were isolated from different (a) vineyards in Spain and Portugal, (b) grape varieties (c) bunches (i.e., sound and botrytized) and (d) positions in the botrytized bunch (i.e., interior or exterior). A novel Headspace-Phase Microextraction (SPME) followed by Gas Chromatrography/Mass Spectrometry (GC-MS) dedicated to analyze geosmin, methylisoborneol (MIB), 1-octen-3-ol, fenchone and fenchol in grape broth medium was used. Approximately 50% of the B. cinerea strains induced detectable geosmin. One strain accumulated significant amounts of anisoles, demonstrating that this contamination might already occur in the vineyard. Strains from the interior of Cainho grape bunches induced more geosmin and hence it may be possible to reduce this volatile in wine by avoiding using these grapes in case of B. cinerea attack"
Keywords:		Botrytis/*metabolism Culture Media/analysis/metabolism Fermentation Penicillium/*metabolism Portugal Spain Vitis/chemistry/*microbiology Volatile Organic Compounds/analysis/*metabolism Wine/analysis/*microbiology;
Notes:		"MedlineMorales-Valle, H Silva, L C Paterson, R R M Venancio, A Lima, N eng Research Support, Non-U.S. Gov't England 2011/05/17 Food Microbiol. 2011 Aug; 28(5):1048-53. doi: 10.1016/j.fm.2011.02.005. Epub 2011 Feb 27"