WAC 2022 banner
IVES 9 IVES Conference Series 9 WAC 9 WAC 2022 9 1 - WAC - Oral presentations 9 Evolution of chemical pattern related to Valpolicella aroma ‘terroir’ during bottle aging

Evolution of chemical pattern related to Valpolicella aroma ‘terroir’ during bottle aging

Abstract

Valpolicella is a famous Italian wine-producing region. Wines produced in its different sub-regions are believed to be aromatically different, as confirmed by recent studies in our laboratory. Aging is a very common practice in Valpolicella and it is required by the appellation regulation for periods up to four years require wines. The aim of this study was to investigate the evolution, during aging, of volatile chemical composition of Valpolicella wines obtained from grapes harvested in different sub-regions during different vintages.

Corvina and Corvinone grapes, the two main varieties of Valpolicella appellation, were harvested from five different vineyard blocks located in two sub-regions within Valpolicella during three consecutive vintages (2017-2019). Winemaking was performed under standardized conditions. An accelerated aging protocol was applied placing wines at 16°C and 40 °C for 30 days in epoxy resin sealed vials. Free volatile compounds as well as those obtained through hydrolysis of glycosidic precursors were analysed with gas chromatography mass spectrometry (GC-MS) coupled with SPE and SPME extractions.

Application of multivariate data analysis techniques to young wines allowed to identify volatile chemical patterns representing the unique aroma chemical signature of the geographical origin of each wine, regardless of vintages. In the case of aged wines, aroma signatures of individual geographical origin were preserved to a good extent after aging. In the case of Corvina, ageing slightly reduced the diversity associated with vineyard signature, conversely in Corvinone it seemed to have enhanced it. Terpenes were at the same times among the main drivers of vineyard signatures of both young and aged wines but also among the compounds most affected by ageing treatments. Highly relevant correlations were found between the decrease of some of the terpenes and the occurrence or increase of others. These transformations involve odor- active compounds with implications for floral and balsamic attributes. Despite the deep changes occurring during aging, aged wines retained an aroma chemical signature that was characteristic of their geographical origin.

DOI:

Publication date: June 9, 2022

Issue: WAC 2022

Type: Article

Authors

Giovanni Luzzini, Davide, Slaghenaufi, Maurizio, Ugliano

Presenting author

Giovanni Luzzini – Università di Verona

Università di Verona | Università di Verona

Contact the author

Keywords

 Red wine aroma – Terroir – Chemical signature of geographic identity – Valpolicella – Aging

Tags

IVES Conference Series | WAC 2022

Citation

Related articles…

Étude intégrée et allégée des terroirs viticoles en Anjou: caractérisation et zonage de l’unité terroir de base, en relation avec une enquête parcellaire

The terroir concept is presented as the basis of the A.O.C system, in the french vineyards. The “Anjou terroirs” programme aims at bringing the necessary scientific basisfor a rational and reasoned exploitation of the terroir. lt must lead to finalizing a lighter, more relevant integrated method of characterisation wich could be generally applied.

Read More

High-throughput sequencing analysis based on nematode indices revealed healthier soils of organic vineyards 

Proper soil health assessments are crucial for sustainable cropland. Among the widely employed approaches, evaluating nematode community structure is particularly suitable. Traditionally, the taxonomic characterization of soil nematodes has relied on time-consuming morphology-based methods requiring experienced experts. However, molecular tools like high-throughput sequencing have emerged as efficient alternatives. In this study, we performed a metataxonomic analysis of soil samples collected from 57 vineyards in the DOCa Rioja region of Northern Spain, focusing on the impact of organic viticulture and cover cropping compared to integrated pest management (IPM) and tilling practices.

Read More

Interpreting wine aroma: from aroma volatiles to the aromatic perception

Wine contains so many odorants that all its olfaction-related perceptions are, inevitably, the result of the interaction between many odorants.

Read More

Agroclimatic characterisation of the Portugese wine denominations of origin using a compound index

Aims: This study aims to: (1) characterize the agroclimatic conditions of the Portuguese Denominations of Origin, using a compound index that combines thermal and soil water balance conditions and a high-resolution climatic dataset (~1 km spatial resolution); (2) categorize the main grapevine varieties as a function of this compound index.

Read More

Application of satellite-derived vegetation indices for frost damage detection in grapevines

Wine grape production is increasingly vulnerable to freeze damage due to warming climates, milder winters, and unpredictable late spring frosts. Traditional methods for assessing frost damage in grapevines which combine fieldwork and meteorological data, are expensive, time-consuming, and labor-intensive. Remote sensing could offer a rapid, inexpensive way to detect frost damage at a regional scale. Remote sensing approaches were used to assess freeze damage in grapevines by evaluating satellite-derived vegetation indices (VIs) to understand the severity and spatial distribution of damage in several New York vineyards immediately after a frost event (May 17th-18th, 2023). PlanetScope 3m satellite images acquired before and after the freeze were used to map damage and measure changes in VIs for vineyards in the Finger Lakes region.

Read More