WAC 2022 banner
IVES 9 IVES Conference Series 9 WAC 9 WAC 2022 9 3 - WAC - Posters 9 The chemical composition of disease resistant hybrid grape cultivars and its impact on wine quality: an exploratory enquiry into sustainable wines

The chemical composition of disease resistant hybrid grape cultivars and its impact on wine quality: an exploratory enquiry into sustainable wines

Abstract

Disease resistant hybrid grape cultivars are now allowed in a number of EU wine PDOs, and are also accepted in a number of countries outside the EU. There is increasing interest in diseases resistant hybrid grape cultivars (RHGCs) because they allow for the production of healthy, high quality grapes with limited use of pesticides and the associated environmental and public health problems. However, the chemical composition of DRHGCs differs from Vitis vinifera, and hence winemaking protocols need to be adjusted. In particular, DRHGCs are frequently high in pH, due to their mineral content, and low in titratable acidity, due to the ability of the grapes to continue to accumulate acid post-véraison. They are also frequently low in tannins, partly due to their high protein content. This can also mean that the addition of exogenous tannins might not be sufficient to increase wine tannin levels to match Vitis vinifera wines. Depending on the species used in breeding, they can also have unusual herbaceous or ‘foxy’ aromas, which can be off-putting to consumers. In response, vignerons have trailed a number of different methods for vinifying DRHGCs, such as thermovinification, carbonic maceration, and cold soaks. The results of such trials are still inconclusive, and it is likely that different cultivars will require different approaches. This study will examine the chemistry of DRHGCs, and propose vinification techniques suitable for use in producing high quality wines. The paper is part of a broader investigation on sustainability in the wine sector and contributes to establish a scientific evidence for defining further steps in the direction of the ecological transition.

Download the PDF

DOI:

Publication date: June 27, 2022

Issue: WAC 2022

Type: Article

Authors

Gavin DULEY, Edoardo LONGO, Federica VIGANÒ, Emanuele BOSELLI

Presenting author

Gavin DULEY  – Free University of Bozen-Bolzano

Free University of Bozen-Bolzano, Free University of Bozen-Bolzano, Free University of Bozen-Bolzano

Contact the author

Keywords

Disease resistant hybrid grape cultivars – sustainable wines – winemaking protocols – green technologies – wine chemistry

Tags

IVES Conference Series | WAC 2022

Citation

Related articles…

Preliminary steps of a protocol to isolate transcription factors bound to a specific DNA locus in grapevine using CRISPR-dCas9 system

Cis-acting regulatory elements are DNA sequences that can be bound by transcription factors to regulate the expression of genes in a condition-dependent and tissue-specific way. It is nowadays possible to search for DNA motives and sequences that a given transcription factor is binding or at least can, but it is still hard to have a glance at all the transcription factors that are contemporaneously located at the same locus. Inspired by an existing technique that uses the CRISPR-Cas system in mammal cells, we are trying to develop a protocol to study such regulation in Vitis vinifera. Using the highly sequence-specific binding capacity of a catalytically inactive Cas9 protein (dCas9), our idea is to set up a system to target a desired sequence and precipitate all the crosslinked proteins and distantly interacting chromatin at this locus and analyze them.

Read More

Effect of ultraviolet B radiation on pathogenic molds of grapes

The fungicidal effect of UV-C radiation (100-280 nm wavelength) is well known, but its applicability for the control of pathogenic molds of grapes is conditioned by its effect on the host and by the risks inherent in its handling[1].
As an alternative, the effect in vitro of UV-B radiation (280-315 nm) on the main pathogenic molds of grapes has been studied: Botrytis cinerea, Aspergillus niger, Penicillium expansum and Rhizopus stolonifer.

Read More

Combining high-power ultrasound and oenological enzymes during winemaking for improving red wine chromatic characteristics

he use of high-power ultrasound (US) is proving of great interest to the oenological industry due to its effects in the improvement of wine organoleptic characteristics, especially in terms of color [1, 2].

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

Wine shaking during transportation: influence on the analytical and sensory parameters of wine

According to OIV reports, annual world wine consumption fluctuated around 240-245 mln hL over the past decade. The general market globalization has led to the situation when almost half of the consumed wine is exported to other countries. Of this volume, more than 60 mln hL are bottled still and sparkling wines.

Read More