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Communication Dans Un Congrès Année : 2018

Composés potentiellement support de l’activité antifongique de cultures bioprotectrices dans des produits laitiers

Résumé

Fungi are commonly responsible for dairy product spoilage, which leads to substantial economic losses for the dairy industry as well as consumer dissatisfaction. Lactic acid bacteria can play an active role in the bioprotection of fermented dairy product, by producing a large range of antifungal metabolites. In a previous study, 3 binary combinations of lactobacilli strains were selected from a screening of the antifungal activity of 32 strains tested as adjunct cultures in yogurt and cheese models and the applicability of 2 of them in dairy products was validated at the pilot scale in sour cream and semi-hard cheese. Thus, the aim of the present study was to investigate the compounds produced by these antifungal cultures in these dairy products with a potential role in the observed antifungal activity. Using four different analytical methods including high performance liquid chromatography and gas chromatography combined or not with mass spectrometry, 53 compounds with known antifungal activity were detected in at least one of the four dairy products analyzed. Each antifungal culture produced a cocktail of 2 to 27 compounds, depending on the product. Acetic acid, diacetyl, hydroxyphenyllactic acid, pyruvic acid, phenyllactic acid, succinic acid, decanoic acid and some long-chain unsaturated fatty acids were the most commonly identified compounds. Their concentrations markedly differed according to the considered dairy product. Lactic, acetic, and citric acids were the most abundant compounds, while most of the other compounds were present in concentrations <100 mg/kg. Thirty-one compounds were in significantly higher concentrations (p. value < 0.05) in at least one product inoculated with 1 or more of the tested antifungal cultures compared to the controls without antifungal culture. Overall, by analyzing the antifungal compounds in 4 dairy products, this study provides an expanded view of compounds produced by efficient antifungal cultures.
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Format : Présentation

Dates et versions

hal-01905545 , version 1 (08-10-2019)

Identifiants

  • HAL Id : hal-01905545 , version 1
  • PRODINRA : 450257

Citer

Marcia Leyva Salas, Jerome Mounier, Marie-Bernadette Maillard, Florence Valence, Emmanuel Coton, et al.. Composés potentiellement support de l’activité antifongique de cultures bioprotectrices dans des produits laitiers. 14.congrès national de la Société Française de Microbiologie (SFM), Oct 2018, Paris, France. ⟨hal-01905545⟩
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