WAC 2022 banner
IVES 9 IVES Conference Series 9 WAC 9 WAC 2022 9 3 - WAC - Posters 9 Influence of nitrogen supply on colorimetric parameters of Lugana wines

Influence of nitrogen supply on colorimetric parameters of Lugana wines

Abstract

Color is one of the main qualitative parameters of a wine. As a matter of fact, immediately after having opened a bottle of wine, color, even before aroma and taste, is the first sensorial parameter to be evaluated by the consumer It can change according to various factors depending on the characteristics of the grapes or on the different production and storage processes. This study aims to evaluate the color differences on Lugana wines that are fermented with different yeast and nitrogen supply. Lugana wines were produced with 2021 vintage grapes. Wines were produced with a standard protocol with two different yeasts: Zymaflore Delta e Zymaflore X5 (Laffort, France). Winemaking was carried out in triplicate. During alcoholic fermentation of the must, when H2S appeared, additions of various nitrogen supply were made. Four different nitrogen nutrients have been added: inorganic nitrogen, organic nitrogen, a mix of inorganic and organic nitrogen and organic nitrogen with an addition of pure methionine. Subsequently the wines were subjected to accelerated aging at 40°C for 30 days. Color parameters of wines were evaluated thanks Color P100 (Nomasense) colorimeter and expressed in CIELab coordinates. Colorimetric differences were expressed through ∆E parameter. We found significant differences among wines fermented with same yeast and supplemented with different nitrogen supply. No significant difference was attributed to yeast strain. Colorimetric analysis showed that the addition of inorganic nitrogen produced the greatest colorimetric difference with the control wine. The ΔE values of the samples which included the addition of inorganic nitrogen even with the addition of methionine, are significantly different from the control samples which did not foresee any addition of nitrogen to the musts. Furthermore, despite an impact of accelerated aging treatment on colour, relative differences among samples remained constant. This study provided a first insight into the influence of the different nitrogen supply on the color of Lugana wines. The CIELab colorimetric analyzes carried out showed that inorganic nitrogen nutrition leads to Lugana wines of different colors with higher ΔE values.  Further studies should investigate whether these interesting differences should be attributed to nitrogen nutrition alone or other enological variables and extend the tests to other white and red wines. The present work was supported Laffort, France.

DOI:

Publication date: June 27, 2022

Issue: WAC 2022

Authors

Beatrice, PERINA, Virginie, MOINE, Arnaud, MASSOT, Davide, SLAGHENAUFI, Giovanni, LUZZINI, Maurizio, UGLIANO

Presenting author

Beatrice, PERINA – Department of Biotechnology, University of Verona

Biolaffort, France | Biolaffort, France| Department of Biotechnology, University of Verona | Department of Biotechnology, University of Verona | Department of Biotechnology, University of Verona

Contact the author

Keywords

Lugana wine-White wine-Colour-CIELab-Nitrogen nutrition

Tags

IVES Conference Series | WAC 2022

Citation

Related articles…

Non-saccharomyces yeasts in the biocontrol of grape molds in vineyards to reduce the use of pesticides

The wide diffusion of organic cultivation of vineyards and the need to reduce the use of pesticides highlights the urgent need for alternative and sustainable methods of vine protection by pathogen molds.

Development and application of CRISPR/Cas in grapevine

The development and application of CRISPR (clustered regularly interspaced short palindromic repeats)/Cas (CRISPR-associated protein) technologies have revolutionized genome editing in plants due to its simplicity, high efficiency, and versatility. As an economically important fruit crop worldwide, grapevine genome editing using CRISPR/Cas technologies has also been reported these years. Here we introduce the development briefly of the most popular CRISPR/Cas9 system and also the state-of-the-art CRISPR technologies developed so far. Moreover, we summarize CRISPR/Cas9-mediated applications for gene functional study and trait improvement in grapevine.

The interplay between water deficit and nitrogen and potassium nutrition in Vitis vinifera L.

Climate change is expected to provoke an increase in the frequency and intensity of drought events and water scarcity that will have detrimental effects on photosynthesis and plant yield. To sustain an appropriate plant yield under sub-optimal conditions, a common practice is the application of high amounts of fertilizers with negative environmental consequences. The present study aims at evaluating the interplay between water and nutrient availability, namely nitrogen (N) and potassium (K), in two grapevine cultivars with a different sensitivity to water shortage stress. Two-year-old Vitis Vinifera cv. Cabernet Sauvignon and Grenache grapevine plants grafted on SO4 rootstock have been transferred in pots under semi-environmental conditions.

Aptitude du cépage Chenin à l’élaboration de vins liquoreux en relation avec certaines unités terroirs de base de A.O.C. Coteaux du Layon

Massif and the first sedimentary formations of the western aureole of the Paris Basin. If it is found all over the world (California, Israel, South Africa), it is in this region that it best asserts its identity. It is one of the most interesting grape varieties due to the variety and complexity of the wines it can produce. It can give very dry or very sweet, still or sparkling wines, fresh when young and sublime when ageing, expressing the characteristics of each vintage as much as those of the terroir. The Chenin is a faithful witness of its geographical, geological, pedological and climatic environment; he is the foil of the land. It has strong aptitudes for the production of sweet wines conditioned by overripe grapes often botrytised in the AOC Coteaux du Layon.Massif and the first sedimentary formations of the western aureole of the Paris Basin. If it is found all over the world (California, Israel, South Africa), it is in this region that it best asserts its identity. It is one of the most interesting grape varieties due to the variety and complexity of the wines it can produce. It can give very dry or very sweet, still or sparkling wines, fresh when young and sublime when ageing, expressing the characteristics of each vintage as much as those of the terroir. The Chenin is a faithful witness of its geographical, geological, pedological and climatic environment; he is the foil of the land. It has strong aptitudes for the production of sweet wines conditioned by overripe grapes often botrytised in the AOC Coteaux du Layon.

Geochemistry of Vrbničko Polje (Croatia) winegrowing site

A multi-element pedo-geochemical survey was carried out in Vrbničko polje vineyards on the Krk Island, Croatia. This Mediterranean winegrowing site is famous by Žlahtina wine production.