Use of Lachancea thermotolerans for the Bioacidification of White Grape Musts: Assays from the Bench to the Cellar Scale

To date, there are no specific guidelines for the use of bioacidifying yeasts in winemaking. In this work, we aimed to characterize an oenological strain of Lachancea thermotolerans (Lt), a non-Saccharomyces lactic acid-producing yeast, and to test different sequential inoculation conditions with Sa...

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Bibliographic Details
Published in:Fermentation (Basel) 2024-09, Vol.10 (9), p.458
Main Authors: Sizzano, Federico, Bianconi, Valentina, Blackford, Marie, Bieri, Stefan, Vuichard, Frédéric, Monnard, Christine, Amiet, Laurent, Spring, Jean-Laurent, Dorsaz, Eddy, Pfenninger-Bridy, Nadine, Simonin, Scott, Bach, Benoit, Bourdin, Gilles
Format: Article
Language:English
Subjects:
Acidification
Acidity
Cooling
Ethanol
Experiments
Fermentation
Fourier transforms
Grapes
Inoculation
Lachancea thermotolerans
Lactic acid
Methods
Musts
Software
Sugar
Temperature
Wine and wine making
Wineries
Wineries & vineyards
Yeast
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Summary:To date, there are no specific guidelines for the use of bioacidifying yeasts in winemaking. In this work, we aimed to characterize an oenological strain of Lachancea thermotolerans (Lt), a non-Saccharomyces lactic acid-producing yeast, and to test different sequential inoculation conditions with Saccharomyces cerevisiae (Sc). The results of bench scale vinifications showed that both the strategy of inoculating Sc 12 h after Lt and the mixing of Lt and Sc during fermentation delivered an acceptable increase in lactic acid (2 g/L) and a decrease in pH (about 0.15 units). Therefore, both strategies were implemented in winery experiments. Our results at the cellar scale showed no increase in acidity, which was likely due to the presence of indigenous yeasts. Overall, our experience shows the difficulty of translating laboratory protocols into cellar experiments and calls for further research into new strategies for implementing acidifying yeasts.
ISSN:2311-5637
2311-5637
DOI:10.3390/fermentation10090458