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Fermentative capability and aroma compound production by yeast strains isolated from Agave tequilana Weber juice

Diaz-Montano, Dulce Maria and Délia, Marie-Line and Estarron-Espinosa, Mirna and Strehaiano, Pierre Fermentative capability and aroma compound production by yeast strains isolated from Agave tequilana Weber juice. (2008) Enzyme and Microbial Technology, 4 (7). 608-616. ISSN 0141-0229

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Official URL: http://dx.doi.org/10.1016/j.enzmictec.2007.12.007


Five yeast strains isolated from agave juice were studied for their fermentative and aromatic capacity. The experiments were performed using agave juice supplemented with ammonium sulphate, as is commonly done in tequila distilleries. Three strains classified as Saccharomyces cerevisiae showed high biomass and ethanol production, as well as higher ethanol tolerance than those classified as Kloeckera africana and Kloeckera apiculata, which showed scarce growth. The results suggest that Kloeckera strains were affected by nutritional limitation and/or toxic compounds present in agave juice. Agave juice analyses showed a lower amino acid content than those reported in grape juice. S. cerevisiae strains produced predominantly amyl and isoamyl alcohols, n-propanol, 2-phenyl ethanol, succinic acid, glycerol, methanol, isoamyl acetate, ethyl hexanoate, acetaldehyde and isobutanol, whereas Kloeckera strains showed a high production of acetic acid, 2-phenyl ethyl acetate and ethyl acetate. The methanol concentration was significantly different among the yeasts studied. The diversity between three S. cerevisiae strains were higher for the aromatic profile than for genetic level and kinetic parameter. On the other hand, the diversity of Kloeckera yeasts were lower than Saccharomyces yeasts even when belonging to two different species.

Item Type:Article
Additional Information:This publication is available on http://www.sciencedirect.com/science/journal/01410229
HAL Id:hal-03577267
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco - CIATEJ (MEXICO)
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Bioprocédés et systèmes microbiens (BioSyM)
Deposited On:29 Jun 2009 11:26

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