IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Comparison between the volatile chemical profile of two different blends for PDO “Valpolicella Superiore”

Comparison between the volatile chemical profile of two different blends for PDO “Valpolicella Superiore”

Abstract

Valpolicella is a famous wine producing region located in the north of Verona close to Garda lake and owes its fame above all to the production of two Protected Designation of Origins (PDOs) withered wines: Amarone and Recioto. Nowadays the production of another PDO, Valpolicella Superiore is gaining more attention by the consumers, increasing the interest of the wineries to improve the quality of this wines. All the Valpolicella wines are produced with a unique grape blend, mainly Corvina, Corvinone, Rondinella and a range of other minor varieties.Traditionally, Valpolicella product regulation required the blend to have a greater proportion (equal to …) of Corvina grape, from 2019 it changed allowing new blend compositions. For this reason, studying the volatile chemical profiles of different Valpolicella blends to support wine makers in the choices of the winery represents a field of great interest.The study aimed to evaluate the volatile chemical and sensory composition of two different blends, one “traditional” (70% Corvina, 30% Rondinella) and one “experimental” (60% Corvinone, 20% Corvina, 20% Rondinella).The grapes were supplied by six wineries in Valpolicella, four of which provided both blends, whereas for two companies were produced only traditional wines. Winemaking was performed under standardized conditions. Free volatile compounds as well as glycosidic precursors were analysed with gas chromatography mass spectrometry (GC-MS) techniques coupled with SPE and SPME extractions. Fermentation kinetics were found to be influenced by the different composition of the blends.We found many significant difference in volatile chemical composition among the two blends. This study found that Corvina-based wines have a higher concentration of terpenoids than Corvinone-based wine, conversely experimental blend wines, showed  a higher concentration of norisoprenoids. Interestingly multivariate analysis of the volatile compounds showed higher influence of the terroir compared to blend influence. This was reasonable because 40% of the grapes in the blends are the same and the remaining 60% varies. Moreover this result gives indications about the importance of the origin of the grapes and of the terroir of Valpolicella. 

DOI:

Publication date: June 24, 2022

Issue: IVAS 2022

Type: Poster

Authors

Cristanelli Giacomo1, Luzzini Giovanni1, Slaghenaufi Davide1 and Ugliano Maurizio1

1Department of Biotechnology, University of Verona

Contact the author

Keywords

Red wine aroma, Valpolicella, Varietal identity, Terroir, Protected Designation of Origin

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Towards a regional mapping of vine water status based on crowdsourcing observations

Monitoring vine water status is a major challenge for vineyard management because it influences both yield and harvest quality. It is also a challenge at the territorial scale for identifying periods of high water restriction or zones regularly impacted by water stress. This information is of major importance for defining collective strategies, anticipating harvest logistic or applying for irrigation authorisation. At this spatial scale, existing tools and methods for monitoring vine water status are few and often require strong assumptions (e.g. water balance model). This paper proposes to consider a collaborative collection of observations by winegrowers and wine industry stakeholders (crowdsourcing) as an interesting alternative. Indeed, it allows the collection of a large number of field observations while pooling the collection effort. However, the feasibility of such a project and its interest in monitoring vine water status at regional scale has never been tested. The objective of this article is to explore the possibility of making a regional map of vine water status based on crowdsourcing observations. It is based on the study of the free mobile application ApeX-Vigne, which allows the collection of observations about vine shoot growth. This information is easy to collect and can be considered, under certain conditions, as a proxy for vine water status. This article presents the first results obtained from the nearly 18,000 observations collected by winegrowers and wine industry stakeholders during 2019, 2020 and 2021 seasons. It presents the vine shoot growth maps obtained at regional scale and their evolution over the three vintages studied. It also proposes an analysis of the factors that favoured the number of observations collected and those that favoured their quality. These results open up new perspectives for monitoring vine water status at a regional scale but above they provide references for other crowdsourcing projects in viticulture.
Read More

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

Read More

Unique resistance traits against downy mildew from the domestication center of grapevine

The Eurasian grapevine (Vitis vinifera), an Old World species now cultivated worldwide for high-quality wine production, is extremely susceptible to the agent of downy mildew, Plasmopara viticola.

Read More

Effect of drought on grapevine wood fungal pathogen communities using a metatranscriptomics approach

Crops are facing increasing biotic and abiotic stress pressures due to global changes. However, trade-off mechanisms between these stresses and the underlying physiological processes are still poorly understood, especially in perennial crop species. To better understand these trade-offs, we studied the effect of drought on grapevine (Vitis vinifera) physiology and esca-related wood fungal communities. Esca is a vascular disease caused by a community of wood-infecting pathogenic fungi, and characterized by trunk necrosis, leaf scorch symptoms, yield losses, and mortality.

Read More

The combined use of Lachancea thermotolerans and lactic bacteria in wine technology

The production of most red wines that are sold involves an alcoholic fermentation carried out by yeasts of the Saccharomyces genus, and a subsequent fermentation carried out by lactic bacteria of the Oenococus oeni species after the first one is fully completed. However, the traditional process can face complications, which can be more likely in grape juices with high levels of sugar and pH. Because of climate change, these situations are more frequent in the wine industry. The main hazards in those scenarios are halts or delays in the alcoholic fermentation or the growth of unwanted bacteria while the alcoholic fermentation is not done yet and the wine still has residual sugars.

Read More