6533b82cfe1ef96bd128f580
RESEARCH PRODUCT
Performance of industrial strains of Saccharomyces cerevisae during wine fermentation is affected by manipulation strategies based on sporulation.
José V. Gimeno-alcañizJosé V. Gimeno-alcañizEmilia MatallanaEmilia Matallanasubject
Saccharomyces cerevisiae ProteinsGlycoside HydrolasesMutantWineSaccharomyces cerevisiaeBiologyApplied Microbiology and BiotechnologyMicrobiologyDNA FungalGeneEcology Evolution Behavior and SystematicsGeneticsWineFermentation in winemakingbeta-FructofuranosidaseWild typeFungal geneticsfood and beveragesSpores FungalDNA-Binding ProteinsRepressor ProteinsYeast in winemakingBlotting SouthernGlucoseFermentationFermentationPlasmidsdescription
Genetic manipulation of industrial wine yeast strains has become an essential tool for both the study of the molecular mechanisms underlaying their physiology and the improvement of their fermentative properties. The construction of null mutants for any gene in these usually diploid strains, by using a procedure based on sporulation of a heterozygote lacking one copy of the gene of interest, has been tested as an alternative to the tedious work of sequential disruption of the complete set of copies. Our results indicate that most of the homozygotes resulting from sporulation of wine yeast strains are defective in glucose consumption under microvinification conditions in synthetic must and produce stuck fermentations. These kinds of defects are observed even for strains derived from sporulation of wild type. Alteration of genomic features of wine strains by sporulation is responsible for these defects.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-03-06 | Systematic and applied microbiology |