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Title:Combined effects of early season leaf removal and climatic conditions on aroma precursors in ‘Sauvignon blanc’ grapes
Authors:ID Sivilotti, Paolo, University of Udine (Author)
ID FALCHI, Rachele, University of Udine (Author)
ID Herrera, Jose Carlos, University of Udine (Author)
ID Škvarč, Branka, Univerza v Novi Gorici (Author)
ID Butinar, Lorena, Univerza v Novi Gorici (Author)
ID Sternad Lemut, Melita, Univerza v Novi Gorici (Author)
ID Bubola, Marijan, Institute of Agriculture and Tourism (Author)
ID SABBATINI, Paolo, Michigan State University (Author)
ID Lisjak, Klemen, Agricultural Institute of Slovenia (Author)
ID Vanzo, Andreja, Agricultural Institute of Slovenia (Author)
Files: This document has no files that are freely available to the public. This document may have a physical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Early leaf removal around the cluster zone is a common technique applied in cool climate viticulture, to regulate yield components and improve fruit quality. Despite the increasing amount of information on early leaf removal and its impact on total soluble solids, anthocyanins and polyphenols, less is known regarding aroma compounds. In order to verify the hypothesis that defoliation, applied before or after flowering, could impact the biosynthesis of thiol precursors, we performed a two year (2013 and 2014) experiment on Sauvignon blanc. We provided evidence that differential accumulation of thiols precursors in berries is affected by the timing of defoliation and this impact was related to modifications in biosynthetic pathway. Furthermore, the possible interaction between leaf removal treatment and seasonal weather conditions, and its effect on the biosynthesis of volatile precursors are discussed. Our results suggested that in Sauvignon blanc the relative proportion of 4-S-glutathionyl-4-methylpentan-2-one (G-4MSP) and 3-S-glutathionylhexan-1-ol (G-3SH) precursors can be affected by defoliation, and this could be related to the induction of two specific genes encoding glutathione-S-transferases (VvGST3 and VvGST5), while no significant effects on basic fruit chemical parameters, polyphenols and methoxypyrazines were ascertained under our experimental conditions.
Keywords:early leaf removal, cluster exposure, thiol precursors, methoxypyrazines, glutathione S-transferase, Vitis vinifera
Publication version:Author Accepted Manuscript
Year of publishing:2017
Number of pages:32
Numbering:objava na spletni strani, v pripravi
PID:20.500.12556/RUNG-3323 New window
COBISS.SI-ID:4892155 New window
DOI:10.1021/acs.jafc.7b03508 New window
NUK URN:URN:SI:UNG:REP:HIB0JKSX
Publication date in RUNG:31.08.2017
Views:4259
Downloads:0
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Record is a part of a journal

Title:Journal of Agricultural and Food Chemistry
Publisher:American Chemical Society
Year of publishing:2017
ISSN:0021-8561

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:31.08.2017

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