Yeast derivatives: an innovative approach to produce Oenococcus oeni under biofilm form?
Abstract
The malolactic fermentation can occur naturally or be induced by inoculation of selected bacterial strains, most commonly of Oenococcus oeni. However, due to climate change, practices are evolving to adapt to more challenging conditions, especially the increased alcohol content in wine which is particularly harmful to the bacteria. Winemakers are deploying various strategies, including the use of newly selected resistant lactic acid bacteria or the addition of yeast derived nutrients to promote the malolactic fermentation. More recently the use of bacterial biofilms has been described and investigated. A biofilm is a living community of one or more microbial species adhering to a surface and embedded in a self-produced polymeric matrix that confers new properties and resistance to the bacteria. However, the use of starters in biofilm form represents a major challenge, particularly due to the use of -not always authorized- abiotic supports (polystyrene, stainless steel, or wood). The present work proposes the development of innovative biofilms of O. oeni on different yeast derived biotic supports and the investigation of the ability of these new formulations on malolactic fermentation.
DOI:
Publication date: 22/09/2025
Issue: 46th World Congress of Vine and Wine
Type: Oral
Authors
1 Fermentis by Lesaffre, 90 Rue de Lille, Marquette-Lez-Lille, France
2 UMR PAM – Université de Bourgogne, Institut Agro Dijon, INRAE, IUVV, 21000 Dijon, France