OENO IVAS 2019 banner
IVES 9 IVES Conference Series 9 Bio-protection by one strain of M. Pulcherrima: microbiological and chemical impacts in red wines

Bio-protection by one strain of M. Pulcherrima: microbiological and chemical impacts in red wines

Abstract

In enology, bio-protection consists in adding bacteria, yeasts or a mixture of microorganisms on grape must before fermentation in order to reduce the use of chemical compounds such as sulphites. 
More particularly, non-Saccharomyces yeasts are used as a total or partial alternative to sulphites. 
However, scientific data capable of proving the effectiveness of adding these yeasts on grape must remain scarce. A single study in white winemaking showed that early addition of a non-Saccharomyces T. delbrueckii strain could be a microbiological and chemical alternative to sulphites (Simonin et al., 2018). 
However, there is a lack of scientific data concerning red winemaking where the process allows to leave the yeasts added during the whole winemaking. This study reports for the first time the analysis of microbiological and chemical effects of one Metschnikowia pulcherrima strain, inoculated at the beginning of the red winemaking process in three wineries as an alternative to sulphiting. The implantation of the M. pulcherrima was successful in all the wineries and effectively limited the development of spoilage microorganisms in the same way as the addition of sulphites. The addition of non-Saccharomyces strain could protect must and wine from oxidation as demonstrated by the proanthocyanidin and anthocyanin analysis. 
Adding M. pulcherrima had no effect on wine volatile compounds and sensorial analysis. However, the untargeted analysis by FTICR-MS highlighted a bio-protection signature and an activation of certain metabolic pathways.

DOI:

Publication date: June 10, 2020

Issue: OENO IVAS 2019

Type: Article

Authors

Scott Simonin, Hervé Alexandre, Jordi Ballester, Philippe Schmitt-Kopplin, Beatriz Quintanilla-Casas, Stefania Vichi, Dominique Peyron, Chloé Roullier-Gall, Raphaëlle Tourdot-Marécha

UMR PAM, Univ. de Bourgogne Franche Comté/Agrosup Dijon, Equipe VAlMiS, IUVV, Dijon (France)
CSGA, Univ. de Bourgogne, France
Analytical Food Chemistry, Technische Universität München, Germany
INSA – XaRTA, University of Barcelona, Spain

Contact the author

Keywords

Wine bio-protection, Metschnikowia pulcherrima, Metabolomic, Volatile and phenolic compounds

Tags

IVES Conference Series | OENO IVAS 2019

Citation

Related articles…

Response of different grapevine cultivars to water stress using a hydroscape approach

Viticulture worldwide is currently affected by the effects of climate change. This set of adverse phenomena lead to a deterioration of functional vine mechanisms, affecting growth, physiology and grape ripening, which may cause severe losses with respect to yield and quality. To prevent water stress and other abiotic factors from severely affecting its physiology, the vine’s response is to reduce transpiration and photosynthesis rates. This response varies depending on the cultivar and its ability to adapt to the environment. The hydroscape method is based on the internal regulation of water status in the plant. It has been recently used to classify grapevine genotypes according to their iso/anisohydric behavior when they are subjected to water stress conditions.

Read More

New biological tools to control and secure malolactic fermentation in high pH wines

Originally, the role of the malolactic fermentation (MLF) was simply to improve the microbial stability of wine via biological deacidification. However, there is an accumulation of evidence to support the fact that lactic acid bacteria (LAB) also contribute positively to the taste and aroma of wine. Many different LAB enter into grape juice and wine from the surface of grape berries, cluster stems, vine leaves, soil and winery equipment. Due to the highly selective environment of juices and wine, only a few types of LAB are able to grow.

Read More

Stabulation (lees stirring) in must as a method for aroma intensification: A comparison with skin contact and a classical version of Traminer and Sauvignon blanc in Austria

In the course of this study, stabilisation (lees stirring in unclarified must) with skin contact and classic white wine vinification were compared for the Sauvignon blanc and Traminer varieties in Austria. The test wines were analysed for the volatile substances esters, free monoterpenes and fruity thiols

Read More

Bioanalytical workflow for exploring the chemical diversity and antioxidant capacity of grape juice peptides

The oxidative stability of white wines is related to a flow of chemical reactions involving a number of native wine containing compounds composing their antioxidant metabolome.

Read More

Chemical affinity and binding capacity between pre-purified Cabernet-Sauvignon/Merlot anthocyanins and salivary proteins monitored by UHPLC Q-ToF MS analysis

Apart from pro(antho)cyanidins and tannins, other phenolic compounds in wine or grapes have been shown to interact with salivary proteins and may contribute to overall sensory in-mouth sensations [1, 2]. Anthocyanins are the dominant phenolics in red wine and grape skin [3] , so it is expected that they come into contact and interact with salivary proteins after ingestion.

Read More