CHANGES IN THE BIOSYNTHETIC ACTIVITY OF STREPTOMYCETES IN THE SOILS OF MOLDOVA GROWN ON MEDIA OF DIFFERENT COMPOSITION
Светлана БУРЦЕВА, Максим БЫРСА, Технический Университет Молдовы Владимир ШЕПТИЦКИЙ, Молдавский государственный университет Юлия БЕРЕЗЮК, Анастасия ВАСИЛЬЧУК, Приднестровский университет им. Т. Г. Шевченко
Rezumat
The ability of streptomycete strains isolated from the soils of Moldova to accumulate lipids and amino acids in
biomass, depending on the composition of the nutrient medium, was studied. It was found that the studied strains
grow better on complex media; of the tested strains, the most biomass (≈20 g) is formed by the Streptomyces
gougerotii CNMN-Ac-14 (66) strain on M-1 medium; the maximum amount of lipids (≈13.5%) was found in the
strain Streptomyces sp. 49 during growth on M-1 medium, the phospholipid fraction (≈17.2%) was contained in the
maximum quantity in the biomass of the strain Streptomyces sp. 49 when growing on R medium, the sterol fraction
(≈15%) – in the Streptomyces gougerotii CNMN-Ac-14 (66) strain when growing on M-1 medium. The study of
amino acid composition showed that the studied strains synthesize 18-19 amino acids, the total amount of essential
amino acids is 35-40%.
Keywords: Streptomyces, nutrient medium, biomass, lipids, amino acids.
