CAROTENOIDS OF PSYCHROTOLERANT YEAST YEASTS ANTARCTICA. INFLUENCE OF TEMPERATURE ON THE COMPOSITION AND SPECTRAL PROPERTIES OF PIGMENTS

Gribanova Ekaterina Aleksandrovna

Psychrotolerant yeasts of the genera Rhodotorula (3 strains), Sporobolomyces (6 strains), Cystobasidium (2 strains), isolated from soil samples of East Antarctica, can produce torulene, torularhodin, ζ-carotene, γ-carotene and δ-carotene. The highest variety of produced pigments was observed during cultivation at 18 ℃. Yeasts of the genus Rhodotorula, producing carotenoids ζ-carotene and torulene in a ratio of 1:1.8, retained viability for up to 6 minutes of ultraviolet exposure. The presence of torularhodin in the composition ensured higher survival rates of Rhodotorula yeasts during irradiation.

Keywords:yeast, spectrophotometry, carotenoids, psychrophiles, torulene, carotene, torularhodin, Antarctica.