RESUMEN
An intergeneric osmotolerant hybrid yeast, PB2, was used together with the parental strains to study glycerol and arabitol production in batch culture. This fusion product was previously obtained by protoplast fusion between Torulaspora delbrueckii and Saccharomyces cerevisiae. Polyols and biomass production were determined in batch culture under aerobic conditions. Under the conditions tested, using PB2 hybrid and both parental strains, the best results were obtained with the hybrid. Arabitol reached a final concentration of 70 g/l and glycerol was increased to up to 50 g/l.
Asunto(s)
Glicerol/metabolismo , Hibridación Genética , Protoplastos/fisiología , Saccharomycetales/metabolismo , Alcoholes del Azúcar/metabolismo , Medios de Cultivo , Fermentación , Microbiología Industrial/métodos , Presión Osmótica , Saccharomyces cerevisiae/genética , Saccharomyces cerevisiae/metabolismo , Saccharomyces cerevisiae/fisiología , Saccharomycetales/genética , Saccharomycetales/fisiologíaRESUMEN
In the beginning there was yeast, and it raised bread, brewed beer, and made wine. After many not days but centuries and even millenia later, it was named Saccharomyces cerevisiae. After more years and centuries there was another yeast, and it was named Schizosaccharomyces pombe; now there were two stars in the yeast heaven. In only a few more years there were other yeasts, and then more, and more, and more. The era of the non-conventional yeasts had begun.
