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Mixed cultures of Oenococcus oeni strains: A mathematical model to test interaction on malolactic fermentation in winemaking

Brandam, Cédric and Fahimi, Noura and Taillandier, Patricia Mixed cultures of Oenococcus oeni strains: A mathematical model to test interaction on malolactic fermentation in winemaking. (2016) LWT - Food Science and Technology, 69. 211-216. ISSN 0023-6438

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Official URL: https://doi.org/10.1016/j.lwt.2016.01.045

Abstract

The control of malolactic fermentation (MLF) by Oenococcus oeni is an essential step in winemaking process. Although selected O. œni strains are available for winemakers, the MLF is not always successful, sometimes because of indigenous presence of other strains. In this work, interaction during MLF between five strains of O. œni was studied. Experiments were performed in MRS medium modified to be closer to wine conditions (pH 3.5, 10% ethanol). Interaction in mixed cultures of 10 pairs formed by the five strains were analysed from experiments performed in a Membrane Bioreactor (MBR). Pairs were classified in three different classes among growth interaction: 1) negative reciprocal interaction of both strains (6 pairs), 2) interaction that affect negatively one strain and positively the other (3 pairs), and 3) interaction with positive effect on one strain and no effect on the other (1 pair). Thanks to a mathematical model previously established during pure cultures to link growth and malic acid consumption, effect of mixed cultures on the specific activity of cells to consume malic acid has been equally evaluated. This capacity seemed not to be affected for 4 pairs whereas it seemed activated for 6 pairs.

Item Type:Article
HAL Id:hal-01911992
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
Funders:
French National Research Agency (ANR)
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Deposited By: Loetitia MOYA
Deposited On:29 Oct 2018 07:51

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