Journal of Food, Agriculture and Environment




Vol 9, Issue 1,2011
Online ISSN: 1459-0263
Print ISSN: 1459-0255


Influences of pre- and post-veraison cluster thinning treatments on grape composition variables and monoterpene levels of Vitis vinifera L. cv. Sauvignon Blanc


Author(s):

Demir Kok

Recieved Date: 2010-10-14, Accepted Date: 2011-01-03

Abstract:

Grape composition plays important role for wine grapes in terms of wine grape quality. Besides, monoterpenes are a chemical class of compounds present in many highly aromatic Vitis vinifera L. cultivars belonging to Muscat family and some other special cultivars. One of these special grape cultivars is Sauvignon Blanc, and in this study, cluster thinning and its treatment times were used for a tool to increase quality attributes of cv. Sauvignon Blanc. The effects of cluster thinning times at different stages of berry development [B+4W (Bloom +4 Week), B+6W (Bloom +6 Week), B+8W (Bloom +8 Week), B+10W (Bloom +10 Week) and B+12W (Bloom +12 Week)] on grape quality and yield components of cv. Sauvignon Blanc grapevines were investigated during the vegetation period of year 2008. Crop reduction by cluster thinning was roughly 37.5% in yield per grapevine. Grape composition characteristics (FVT (free volatile terpenes), PVT (potentially volatile terpenes), TSS (total soluble solids), TA (total acidity), pH, contents of K+ and Na+) and yield components (berry width, berry length, berry weight, cluster width, cluster length, cluster weight) were variously influenced by cluster thinning times. Canopy density as measured by point quadrat analysis differed among the cluster-thinned grapevines at different thinning times. In spite of differences in canopy density and cluster thinning times, grape composition and yield attributes were not statistically found to be significant except juice pH. Between pre- and post-veraison treatments, cluster thinning at B+8W especially improved grape quality characteristics of cv. Sauvignon Blanc.

Keywords:

Vitis vinifera L., cluster thinning, berry development, veraison, grape composition, monoterpenes


Journal: Journal of Food, Agriculture and Environment
Year: 2011
Volume: 9
Issue: 1
Category: Food and Health
Pages: 22-26


View full PDF
Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.


Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :