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Study of Starch Degradation by Yeasts During Fermentation for Using in Animal Feed

Author:
Alonso, Santiago, Arévalo-Villena, Maria, Úbeda, Juan, Briones, Ana
Source:
Applied biochemistry and biotechnology 2010 v.162 no.7 pp. 2058-2066
ISSN:
0273-2289
Subject:
culture media, feed supplements, feeds, fermentation, nucleic acids, starch, yeasts
Abstract:
Sixteen amylolytic yeasts, drawn from culture collections or isolated from different environments, were used in the present study. Experiments were performed to evaluate the starch degradation due to exocellular activity. The culture media of growth was optimized to find the maximum activity, and some strains produced an extracellular amylolytic enzyme when cultured in presence of starch in the medium. On the other hand, one yeast showed activity in cell extract when cultured under varying conditions in a bench bioreactor; this strain would thus be suitable for use as an animal feed supplement, both as a source of proteins and nucleic acids and in terms of its amylolytic activity.