Macrowine 2021
IVES 9 IVES Conference Series 9 Macrowine 9 Macrowine 2021 9 Grapevine diversity and viticultural practices for sustainable grape growing 9 Insights into the stable isotope ratio variability of hybrid grape varieties

Insights into the stable isotope ratio variability of hybrid grape varieties

Abstract

The wine industry faces the consumer’s increasing demand for a sustainable and environmentally-friendly production [1]. This demand has been shared and boosted by the European Union within the European Green Deal in the Farm to Fork strategy that aims to reduce a 50% the pesticide utilisation in farming systems. Among the agronomical approaches so far proposed, the use of mould resitant hybrid varieties -based on crossings of Vitis vinifera with other Vitis spp [2]- with a high tolerance to the attack of vine patogens is gaining the vinegrowers attention and the production area is continuously increasing. The analysis of stable isotope ratio is the reference method to fight against counterfeiting in the wine industry, also thanks to the establishment of annual official reference databases in which the isotopic ranges of variability are reported [3]. This study aims to characterise and determine whether there is a varietal variation in the stable isotopic ratio of European Vitis vinifera to modern hybrid varieties. Wine samples produced with seven white varieties (Aromera, Bronner, Helios, Johanniter, Muscaris, Solaris, Souvignier Gris) and seven red varieties (Baron, Cabernet Cortis, Cabernet Cantor, Cabernet Carbon, Monarch, Prior, Regent) grown in two experimental plots sited in the north Italian region of Trentino were analysed for the stable isotopic ratio. Results were compared to the ratio isotopic ratio of the wines obtained from Vitis vinifera varieties of the same production area. The analyses were carried out by isotopic ratio mass spectrometry (IRMS) and site-specific natural isotopic fractionation by nuclear magnetic resonance (SNIF-NMR), according to the official methods of the International Organisation of Vine and Wine (OIV). The comparison shows the tendency of some hybrid varieties to deviate from the regional averages in their stable isotope ratios. In particular, Monarch, Cabernet Carbon and Cabernet Cantor among the red varieties and Solaris, Helios and Souvignier Gris among whites, stood out with values that differed considerably from the regional stable isotope standard values of wines derived from V. vinifera. The study investigates for the first time hybrid varieties from an isotopic point of view.

DOI:

Publication date: September 2, 2021

Issue: Macrowine 2021

Type: Article

Authors

Matteo Perini, Simon Lanzb, Sergio Mosera, Tomas Romana, San Michele all’Adige, Federica Camina

Fondazione Edmund Mach (FEM), via E. Mach 1, 38010, Italy b University of Trento

Contact the author

Keywords

stable isotope; snif-nmr; irms; hybrid; grape

Citation

Related articles…

Yield characteristics and environmental effects of plastic covers on table grape with relation to chemical, physical, radiometric and satellite analyses

Climate change poses a significant challenge for global viticulture, with growing evidence of its negative impact on thermal and hydric regimes, both of which are essential for the development of table grapes.

Read More

Effect of mixed Torulaspora delbrueckii-Saccharomyces cerevisiae culture on rose quality wine

Alcoholic fermentation using no Saccharomyces wine is an effective means of modulating wine aroma. This study investigated the impact of coinoculating Torulaspora delbruecki with two Saccharomyces cerevisiae commercial yeast (QA23, Lallemand; Red Fruit, Sepsa-Enartis) on enological quality parameters, volatile composition and sensory analysis. The following assays were performed on Tempranillo variety: Saccharomyces QA23 (CTQA), Saccharomyces Red Fruit (CTRF), coinoculated T. delbrueckii + S.cerevisiae QA23 (CIQA) and coinoculated T. delbrueckii + S.cerevisiae (CIRF).

Read More

Reusable system for wine bottles: An analysis of acceptance among German wine consumers

Consumer demands for environmentally friendly products, including wine, are constantly increasing.

Read More

Free amino acid composition of must from 7 Vitis vinifera L. cv. in Latium (Italy)

Free amino acid concentrations in must of 7 Vitis vinifera cultivars (Cabernet Franc, Syrah, Merlot, Montepulciano, Sangiovese, Cesanese d’Affile, Carmenere) grown in the Latium region (Italy) were monitored from 2003 to 2005. The cultivars were located in a homogeneous soil and climatic zone and with the same training system (Cordon Spur).

Read More

Impact of winemaking processes on wine polysaccharides, improving by qNMR

Today the knowledge in terms of molecular composition of the colloidal matrix is ​​not enough in order to control its stability, according to the number of winemaking and wine stabilization processes. The physico-chemical processes during the winemaking change the composition and quantity of wine macromolecules. The goal today is to determine which analytical techniques will allow to discriminate these winemaking processes in order to better understand their impact on colloidal matrix stability as well as which molecules are responsible for its instabilities. METHODS: Wines obtained after conventional winemaking were subjected to different fining and chemical stabilization treatments. Different methods were used to investigate the wine macromolecular composition and stability after chemical stabilization, including quantitative and qualitative analyzes of total soluble polysaccharides by extraction under acidified ethanol, and by size exclusion separation as well as qNMR metabolomics. RESULTS: Observation of a slight difference at the quantitative level using classical analysis between the winemaking processes was observed as well as a strong discrimination by qNMR metabolomics.

Read More