IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Influence of protein stabilization with aspergillopepsin I on wine aroma composition

Influence of protein stabilization with aspergillopepsin I on wine aroma composition

Abstract

The protein haze formation in white and rosé wines during storage, shipping and commercialization has always been an important issue for winemakers. Among the various solutions industrially proposed, the use of bentonite is certainly the most widespread. However, the harmful effects of this treatment are known either in terms of wine volume loss and wine flavour and aroma. The use of aspergillopepsin I -an acid endoprotease from Aspergillus spp- in must and wine has been recently approved by OIV and the European Commission for protein stability, coupled to a heat treatment. Beyond the established efficacy of this approach on wine stability, little is known about its influence on the wine aroma profile. The present study aims to evaluate the combined effect of heat treatment with proteases (HP) in musts on the concentration of 74 wine aroma compounds at lab and semi-industrial scale.  Eight grape musts were treated with acid proteases and heated at 70°C for the lab-scale trials, and the concentrations of wine volatile compounds at the end of the alcoholic fermentation were compared with those deriving form a traditional white and rosé winemaking protocol. The must treatment induced a significant increase (one-way ANOVA, Tukey’s HSD p

DOI:

Publication date: June 27, 2022

Issue: IVAS 2022

Type: Poster

Authors

Gallo Adelaide1, Paolini Mauro1, Tonidandel Loris1, Leonardelli Andrea1, Barbero-Fondazione Alice1, Celotti Emilio2, Natolino Andrea2, Schneider Rémi3, Larcher Roberto1 and Roman Tomas1

1Fondazione Edmund Mach—Technology Transfer Center
2Università degli Studi di Udine—Dipartimento di Scienze Agroalimentari, Ambientali e Animali
3Oenobrands SAS Parc Agropolis II

Contact the author

Keywords

wine aroma, proteases, heat treatment, protein haze

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Significance of factors making Riesling an iconic grape variety

Riesling is the iconic grape variety of Germany and accounts for 23% of the German viticulture acreage, which comprises 45% of the worldwide Riesling plantings.
Read More

Identification and quantification of c-glucosidic ellagitannins and their derivative in red wine aged in oak barrels

The C-glycosidic ellagitannins constitute a subclass of hydrolyzable tannins of remarkable structural diversity. In this work we first achieved the hemisynthesis of flavano-ellagitannins, then we used them to develop a new efficient detection and quantification procedure for the C-glycosidic ellagitannins as well as flavano-ellagitannins.

Read More

Copper reduction strategy for sangiovese in organic viticulture

Organic viticulture requires copper based treatments for bunch protection even though an intensive employment is no longer admitted because of its low leaching and phytotoxicity in the soil. UE Reg. 1981/2018 set copper employment to 4 kg/ha for year or 28 during 7 years with an absolute level allowed of 6 Kg/ha although those limits were decreased frequently.

Read More

L’étude “terroirs d’Anjou”: un exemple de caractérisation intégrée des terroirs viticoles, utilisable à l’échelle parcellaire

Natural factors of the production (“terroir” and vintage) are known as an important element for identifying wines by their genuine typicité and their authenticity. The program “Terroirs d’Anjou” (1994-1999) aims at bringing the necessary scientific basis for a rational and reasoned exploitation of the terroir.

Read More

Adaptation and resilience of scions and rootstocks to water constraint? It’s complicated and requires an integrated approach

The ability, and the underlying mechanisms of grapevines to cope with and adapt to recurring water constraints, are the focuses of this study.

Read More