IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Untargeted metabolomics to identify potential chemical markers responsible for the permissiveness of red wines against Brettanomyces bruxellensis

Untargeted metabolomics to identify potential chemical markers responsible for the permissiveness of red wines against Brettanomyces bruxellensis

Abstract

Red wines constitute the majority of the wines produced in Bordeaux. All along the winemaking process, many microorganisms may develop in wine. A lot of them are useful but a common defect found in wine is linked to the development of Brettanomyces bruxellensis, a yeast that produces volatile phenols. These molecules are responsible for an unwanted sensorial defect described as similar to “horse sweat”, “burnt plastic” or “leather”. It has been shown that while some wines are very permissive and easily contaminated, others are pretty resistant to Brettanomyces development. However, common parameters such as pH, alcohol or sugars composition cannot fully explain the differences observed in wine permissiveness.

In this study, we aim to explain the wine permissiveness by identifying chemical markers specifically present in permissive wines or, on the contrary, in resistant ones. To achieve this goal, we will analyze the metabolite profiles of red wines coming from different châteaux in Bordeaux and displaying different permissiveness, using targeted and untargeted metabolic profiling by UHPLC-UV-HRMS and 1H-NMR. A microbiological study measuring the growth of a couple of Brettanomyces strains will also be conducted to create and assess a permissiveness score for each wine. With the help of unsupervised statistical analyses, these results will be combined in order to draw correlations between the chemical markers and the score obtained by each wine.

DOI:

Publication date: June 27, 2022

Issue: IVAS 2022

Type: Poster

Authors

Miranda Julie1, Dols-Lafargue Marguerite1 and Rouger Caroline1

1Univ. Bordeaux, ISVV, UMR Œnologie EA 4577, UMR 1366 INRAE

Contact the author

Keywords

Untargeted Metabolomics, Brettanomyces bruxellensis, UHPLC-UV-HRMS, Wine

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Enhancing Monastrell wine quality in a climate change scenario: the role of cation exchange resins in addressing acidity challenges

Climate change significantly impacts vine and grape physiology, leading to changes in wine composition, including reduced titratable acidity, elevated ethanol content, and higher pH levels [1].
Read More

Oospore germination dynamics and disease forecasting model for a precision management of downy mildew 

Downy mildew, caused by Plasmopara viticola, is the most economically impactful disease affecting grapevines. This polycyclic pathogen triggers both primary and secondary infection cycles, resulting in significant yield losses when effective disease control measures are lacking. Over the winter, the pathogen survives by forming resting structures, the oospores, derived from sexual reproduction, which produce the inoculum for primary infections. To optimize grapevine downy mildew control and obtain the desired levels of production while minimizing chemical inputs, it is crucial to optimize the timeframe for fungicide application. Disease forecasting models are useful to identify the infection risk.

Read More

Analysis of Cabernet Sauvignon and Aglianico winegrape (V. vinifera L.) responses to different pedo-climatic environments in southern Italy

Water deficit is one of the most important effects of climate change able to affect agricultural sectors. In general, it determines a reduction in biomass production, and for some plants, as in the case of grapevine, it can endorse fruit quality. The monitoring and management of plant water stress in the vineyard

Read More

Historical terraced vineyards – heritage and nature conservation strategies

Historical terrace vineyards are simultaneously impressive documents of the human inclination to design, sites for the production of high quality wines and habitats for a rich variety of flora and fauna

Read More

INSIGHT THE IMPACT OF GRAPE PRESSING ON MUST COMPOSITION

The pre-fermentative steps play a relevant role for the characteristics of white wine [1]. In particular, the grape pressing can affect the chemical composition and sensory profile and its optimized management leads to the desired extraction of aromas and their precursors, and phenols resulting in a balanced wine [2-4]. These aspects are important especially for must addressed to the sparkling wine as appropriate extraction of phenols is expected being dependent to grape composition, as well.

Read More