Applications of <i>Metschnikowia pulcherrima</i> in Wine Biotechnology
Morata, Antonio | Loira, Iris | Escott, Carlos | del Fresno, Juan Manuel | Bañuelos, María Antonia | Suárez Lepe, José Antonio
Metschnikowia pulcherrima (Mp) is a ubiquitous yeast that frequently appears in spontaneous fermentations. The current interest in Mp is supported by the expression of many extracellular activities, some of which enhance the release of varietal aromatic compounds. The low fermentative power of Mp makes necessary the sequential or mixed use with Saccharomyces cerevisiae (Sc) to completely ferment grape musts. Mp has a respiratory metabolism that can help to lower ethanol content when used under aerobic conditions. Also, Mp shows good compatibility with Sc in producing a low-to-moderate global volatile acidity and, with suitable strains, a reduced level of H<inf>2</inf>S. The excretion of pulcherrimin gives Mp some competitive advantages over other non-Saccharomyces yeasts as well as providing some antifungal properties.
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