FEATURES OF CARBOHYDRATE UTILIZATION IN PSYCHROTOLERANT YEASTS

Gribanova Ekaterina Aleksandrovna

The work describes the metabolic potential of yeast isolated from various ecosystems of East Antarctica (Enderby Land, MacRobertson Land). For 21 yeast cultures belonging to the genera Moesziomyces (2 isolates), Leucosporidium (3 isolates), Naganishia (1 isolate), Mycochaetophora (1 isolate), Rhodotorula (3 isolates), Sporobolomyces (6 isolates), Cystobasidium (2 isolates), Solicoccozyma (1 isolate), Dothiora (1 isolate), Glaciozyma (1 isolate) the ability to utilize glucose, lactose, sucrose, fructose, maltose, mannitol, xylose, rhamnose, galactose, peptone, starch, glycerol under aerobic and anaerobic cultivation conditions was determined. The study of glucose utilization under aerobic and anaerobic conditions showed the presence of predominantly respiratory type metabolism, since carbon dioxide formation did not occur under anaerobic cultivation conditions.

Keywords:psychrophiles, metabolism, fermentation, yeast, Antarctica, carbohydrate utilization, growth kinetics, basidiomycetes, and ascomycetes