Mj. Almeida et Cs. Pais, CHARACTERIZATION OF THE YEAST POPULATION FROM TRADITIONAL CORN AND RYE BREAD DOUGHS, Letters in applied microbiology, 23(3), 1996, pp. 154-158
Yeasts were isolated from a variety of home-made bread doughs and iden
tified. A pure culture of Saccharomyces cerevisiae was found in 18% of
the doughs, The same species predominated in 80% of the doughs examin
ed whereas Issatchenkia orientalis, Pichia membranaefaciens and Torula
spora delbrueckii were present in about 40% of the samples, About one
quarter of the isolates displayed killer activity, strains of P. anoma
la showing the broadest spectra. Two isolates of S. cerevisiae and thr
ee of T. delbrueckii gave biomass values in sucrose medium similar to
or higher than those obtained with commercial compressed baker's yeast
strains.