Effects of elevated temperature on growth, respiratory-deficient mutation, respiratory activity, and ethanol production in yeast.
Can J Microbiol
; 34(8): 1014-7, 1988 Aug.
Article
em En
| MEDLINE
| ID: mdl-2850102
ABSTRACT
Some mesophilic yeasts and a thermotolerant strain of Saccharomyces cerevisiae were found to grow at 40 degrees C in complex media containing 1% yeast extract when an inoculum of 10(6) or more cells.mL-1 was used. Yeast extract (6%) permitted Saccharomyces cerevisiae to grow at 40 degrees C even with a smaller inoculum size (10(5) cells.mL-1). The fraction of respiratory-deficient (petite) mutants in 40 degrees C grown culture was less than 10% except for the thermotolerant strain, which showed greatly increased levels depending on culture conditions. Seven of eight yeast strains exhibited extremely reduced cytochrome oxidase activity when grown at 40 degrees C irrespective of the frequency of the petite mutation. In contrast, the accumulation of ethanol in the medium and the ethanol-producing activity of the cells were not affected by growth at 40 degrees C.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Saccharomyces cerevisiae
/
Etanol
Idioma:
En
Revista:
Can J Microbiol
Ano de publicação:
1988
Tipo de documento:
Article
País de afiliação:
Japão