Flavour production by Saprochaete and Geotrichum yeasts and their close relatives.

Food Chem

Université de La Réunion, Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments, LCSNSA, EA 2212, 15 Avenue René Cassin, 97490 Sainte Clotilde, La Réunion, France; Département Génie Biologique, IUT, Université de La Réunion, Saint-Pierre, Ile de la Réunion, France; UMR Qualisud - Démarche intégrée pour l'obtention d'aliments de qualité, Université de La Réunion, IUT - Saint-Pierre, La Réunion, France. Electronic address:

Published: December 2017

In this study, a total of 30 yeast strains belonging to the genera Dipodascus, Galactomyces, Geotrichum, Magnusiomyces and Saprochaete were investigated for volatile organic compound production using HS-SPME-GC/MS analysis. The resulting flavour profiles, including 36 esters and 6 alcohols compounds, were statistically evaluated by cluster and PCA analysis. Two main groups of strains were extracted from this analysis, namely a group with a low ability to produce flavour and a group producing mainly alcohols. Two other minor groups of strains including Saprochaete suaveolens, Geotrichum marinum and Saprochaete gigas were diverging significantly from the main groups precisely because they showed a good ability to produce a large diversity of esters. In particular, we found that the Saprochaete genus (and their closed relatives) was characterized by a high production of unsaturated esters arising from partial catabolism of branched chain amino-acids. These esters were produced by eight phylogenetically related strains of Saprochaete genus.

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http://dx.doi.org/10.1016/j.foodchem.2017.06.009DOI Listing

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