Production of metabolites with antioxidant and emulsifying properties by antarctic strain Sporobolomyces salmonicolor AL₁.

The Sporobolomyces salmonicolor AL(1) Antarctic strain was cultivated and two bioproducts were obtained: exopolysaccharide and biomass. The biologically active substances ergosterol, torularhodin, torulene, β-carotene and CoQ(10) were extracted from the biomass and were quantified as follows: ergosterol 5.2 ± 0.

Synthesis and characterization of an exopolysaccharide by antarctic yeast strain Cryptococcus laurentii AL₁₀₀.

An exopolysaccharide-producing Antarctic yeast strain was selected and identified as Cryptococcus laurentii AL₁₀₀. The physiological properties of the strain and its ability to utilize and biotransform different carbon sources (pentoses, hexoses, and oligosaccharides) into exopolysaccharide and biomass were investigated. Sucrose was chosen as a suitable and accessible carbon source.

Synthesis of coenzyme Q10 and beta-carotene by yeasts isolated from antarctic soil and lichen in response to ultraviolet and visible radiations.

The effect of different doses of visible (Vis), ultraviolet-capital A, Cyrillic (UVA), and mixed light (UVA + Vis) upon coenzyme Q(10) (CoQ(10)) and beta-carotene synthesis and biomass yield by the Sporobolomyces salmonicolor AL(1), Cryptococcus albidus AS(55), Cryptococcus laurentii AS(56), and C. laurentii AS(58) strains isolated from Antarctic samples was investigated. The beta-carotene concentration in the red strain biomass increased by 52% under irradiation with 11 J/cm(2) Vis, and the CoQ(10) concentration rose by 37% in relation to the control quantity obtained through dark cultivation.