3.2. Morphologic and growth characteristics of the selected
microorganisms
The selected yeasts after growing on agarized YPS proliferation
medium presented white-creamy colonies. When strains were
developed in liquid medium the strain A2 showed a homogeneous
and dispersed growth, whereas the growth of the strains A10 and
A11 was flocculent. The biomass was associated forming clusters or
1 mm diameter flocs, being deposited at the bottom of the culture
flasks at the end of fermentation. The three strains were observed
by optical microscopy, showing the 3 isolates an ovoid shape, which
is characteristic in yeasts. It was also observed cell division by
gemmation and the absence of pseudomycelia (Fig. 2).