Isolation, Characterization and Screening for Antimicrobial Activities of Psychrotolerant StreptomycetesIsolated from Polar Permafrost Soil

ABSTRACTNinety one streptomycetes strains were isolated from permafrost soil in Spitsbergen, Arctic Ocean. Five of them showed antimicrobial activity against Gram-positive, Gram-negative bacteria, yeasts and fungi. The strains were psychrotolerant with growth at temperatures between 4°C and 28°C. Morphological, physiological and biochemical characterizations were investigated and the starins could be affiliated to the same genus. Antibiotic production of the strains was investigated at 4°C and the active compouds were isolated from the culture filtrate. Strong activity of the isolated compounds against bacteria, yeast and fungi was detected.