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J Sci Food Agric

Title:		Influence of viticulture practices on grape aroma precursors and their relation with wine aroma
Author(s):		Hernandez-Orte P; Concejero B; Astrain J; Lacau B; Cacho J; Ferreira V;
Address:		"Laboratory for Flavour Analysis and Enology, Department of Analytical Chemistry, School of Sciences, University of Zaragoza, 50009, Zaragoza, Spain"
Journal Title:		J Sci Food Agric
Year:		2015
Volume:		20140616
Issue:		4
Page Number:		688 - 701
DOI:		10.1002/jsfa.6748
ISSN/ISBN:		1097-0010 (Electronic) 0022-5142 (Linking)
Abstract:		"BACKGROUND: The effects of two different operations in the vineyard (basal leaf plucking and head trimming) on the synthesis of aromatic precursors in the grape and their impact on wine aroma have been studied and compared with a control sample. The study was carried out over two consecutive years with four different varieties. Glycosidic precursors were analysed in grapes and volatile compounds were studied in the wines. ANOVA studies were performed to study the effect of the vintage, variety and treatment for each of the compounds released from their precursors. RESULTS: Regarding treatment, the highest values in the concentration of free aroma compounds were achieved in the leaf plucking grapes, except for Chardonnay. Significant and positive correlations between aromatic precursors of terpenes present in grapes and their released form in wines were found for all varieties. For norisoprenoids, significant and positive correlations were exclusively found for Chardonnay and for phenols and vanillins in the year 2010 the correlations were high in three of the four varieties studied. CONCLUSION: In the assays of the 2 years, more precursors were synthesised in Merlot, Gewurztraminer and Tempranillo grapes if the vineyards were plucked"
Keywords:		"Agriculture/*methods Crops, Agricultural/*chemistry/growth & development/metabolism *Food Quality Fruit/*chemistry/growth & development/metabolism Glycosides/analysis/biosynthesis/chemistry Humans Norisoprenoids/analysis/biosynthesis/chemistry Odorants Pl;"
Notes:		"MedlineHernandez-Orte, Purificacion Concejero, Belen Astrain, Jesus Lacau, Blanca Cacho, Juan Ferreira, Vicente eng Comparative Study England 2014/05/24 J Sci Food Agric. 2015 Mar 15; 95(4):688-701. doi: 10.1002/jsfa.6748. Epub 2014 Jun 16"