Temperature Adaptation Markedly Determines Evolution within the Genus Saccharomyces
12 pages, 7 figures, 3 tables
Susceptibility and resistance to ethanol in Saccharomyces strains isolated from wild and fermentative environments
11 pages, 3 figures, 3 tables.-- Article first published online: 8 SEP 2010
Quantifying the individual effects of ethanol and temperature on the fitness advantage of Saccharomyces cerevisiae
The presence of Saccharomyces cerevisiae in grape berries and fresh musts is usually very low. However, as fermentation progresses, the population levels of this species considerably increase. In this study, we use the concept of fitness advantage to measure how increasing ethanol concentrations (0-25%) and temperature values (4-46 °C) in wine fermentations affects competition between S. cerevisiae and several non-Saccharomyces yeasts (Hanseniaspora uvarum, Torulaspora delbrueckii, Candida zemplinina, Pichia fermentans and Kluyveromyces marxianus). We used a mathematical approach to model the hypothetical time needed for S. cerevisiae to impose itself on a mixed population of the non-Saccha…