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Selection of wine yeasts for growth and fermentation in the presence of ethanol and sucrose

Opened Access Selection of wine yeasts for growth and fermentation in the presence of ethanol and sucrose
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Autor: Benítez, Tahía
Castillo, Lucas del
Aguilera López, Andrés
Conde, Jaime
Cerdá Olmedo, Enrique
Departamento: Universidad de Sevilla. Departamento de Genética
Fecha: 1983
Publicado en: Applied and environmental microbiology, 45(5), 1429-1436
Tipo de documento: Artículo
Resumen: To optimize the conversion of carbohydrates to ethanol, strains of several Saccharomyces species were examined for the ability to grow and ferment in a range of sucrose and ethanol concentrations. A total of 632 wine yeasts, most of them isolated from wineries in Andalusia and Extremadura, southwestern Spain, were subjected to screening and selection. Growth and fermentative capacity in different ethanol and sucrose concentrations varied from one strain to another. There was no correlation between growth and fermentative capacity. The best 35 strains grew in 15% ethanol and fermented in 18% ethanol. Ethanol accumulated, although at a reduced rate, after the cells stopped growing. Most yeast strains were highly fermentative in 50% sucrose. Some of them effectively utilized the carbohydrates of the culture, yielding final ethanol concentrations of > 14%. Of the 35 selected strains, 16 were promising for genetic analysis and breeding because of their capacity to sporulate. These strains ...
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Tamaño: 776.1Kb
Formato: PDF

URI: http://hdl.handle.net/11441/29205

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