Abstract
The impact of two different winemaking practices on the chemical and sensory complexity of Pinot Blanc wines from South Tyrol (Italy), from grape pressing to the bottled wine stored for nine months, was studied. New chemical markers of Pinot blanc were identified: astilbin and trans-caftaric acid differentiated the wines according to the vinification; S-glutathionylcaftaric acid correlated with the temporal trends. Fluorescence analysis displayed strong time-evolution and differentiation of the two wines for gallocatechin and epigallocatechin, respectively. After nine months of storage in bottle, the control wine showed higher amounts of most ethyl esters, acetate esters and octanoic acid, whereas higher alcohols characterized instead the wine obtained with prefermentative cold maceration. The sensory panel found notes of apple and tropical fruit in the control wine and attributed a higher overall quality judgement to it, whereas the cold-macerated wine was described by olfactory intensity, spicy and pear attributes.
Highlights
Pinot blanc cv. is a grape variety firstly described in ampelography in 1868 [1]
Pinot blanc has climatic requirements compatible to those normally found in the geographical areas of mountain viticulture, to Chardonnay in terms of heat requirements [3,4]; it is one of the most important grapes grown in some mountain areas of Northern Italy, such as South Tyrol [5]
The impact of two different winemaking protocols for Pinot blanc were evaluated on the enological parameters, phenolic and volatile profiles from musts to bottled wines
Summary
Pinot blanc cv. is a grape variety firstly described in ampelography in 1868 [1]. This grape variety had been confused with Chardonnay cv. until the origin of Pinot blanc as an independent mutation ofPinot noir was definitively demonstrated [2]. Is a grape variety firstly described in ampelography in 1868 [1]. Pinot blanc is one of the most popular grape varieties cultivated in Germany, Austria and France (Alsace). It is diffused in Argentina, Brazil, Canada, China, New Zealand, South Africa, United States and Uruguay [1]. Pinot blanc has climatic requirements compatible to those normally found in the geographical areas of mountain viticulture, to Chardonnay in terms of heat requirements [3,4]; it is one of the most important grapes grown in some mountain areas of Northern Italy, such as South Tyrol [5].
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