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Molecules, Vol. 23, Pages 1372: Influence of Grape Berry Maturity on Juice and Base Wine Composition and Foaming Properties of Sparkling Wines from the Champagne Region

Molecules, Vol. 23, Pages 1372: Influence of Grape Berry Maturity on Juice and Base Wine Composition and Foaming Properties of Sparkling Wines from the Champagne Region

Molecules doi: 10.3390/molecules23061372

Authors: Pin-He Liu Céline Vrigneau Thomas Salmon Duc An Hoang Jean-Claude Boulet Sandrine Jégou Richard Marchal

In sparkling wine cool-climate regions like Champagne, it is sometimes necessary to pick the healthy grape clusters that have a relatively low maturity level to avoid the deleterious effects of Botrytis cinerea. In such conditions, we know that classical oenological parameters (sugars, pH, total acidity) may change but there is little information concerning the impact of grape berry maturity on wine proteins and foaming properties. Therefore, healthy grapes (Chardonnay and Pinot meunier) in 2015 and 2016 were picked at different maturity levels within the range of common industrial maturity for potential alcohol content 8–11% v/v in the Champagne region. Base wine protein content and foamability, and oenological parameters in grape juice and their corresponding base wines, were investigated. The results showed that base wine protein contents (analyzed by the Bradford method and by electrophoresis) and foamability were higher when the grapes were riper. The Pearson’s correlation test found significant positive correlations (r = 0.890–0.997, p < 0.05) between Chardonnay grape berry maturity degree (MD) and base wine foamability in both vintages. Strong correlations between MD and most of the oenological parameters in grape juice and base wine were also found for the two cultivars. Under the premise of guaranteed grape health, delaying harvest date is an oenological decision capable of improving base wine protein content and foamability.

Authors:   Liu, Pin-He ; Vrigneau, Céline ; Salmon, Thomas ; Hoang, Duc An; Boulet, Jean-Claude ; Jégou, Sandrine ; Marchal, Richard
Journal:   Molecules
Volume:   23
edition:   6
Year:   2018
Pages:   1372
DOI:   10.3390/molecules23061372
Publication date:   06-Jun-2018
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