Autecology of Microorganisms of Coastal Ecosystems of the Dead Sea
نویسندگان
چکیده
. From coastal ecosystems of the Dead Sea (vertical steep gorge around of the Dead Sea, clay-salt plain and a black highly mineralized muds) Bacillus licheniformis, B.subtilis subsp. subtilis, Bacillus sp., Staphylococcus hominis strains have been isolated. All strains grew at 0-10 % of NaCl in medium, in a range of 20-50°С. Resistance to UV has been revealed in all the investigated bacteria. Lethal doses of UV (LD90 and LD99,99) for spore-forming strains were 100150 and 1100-1500 J/m, respectively; for strain 6t1 (does not form spores) 50 and 370 J/m. Some strains of genus Bacillus had strong antagonistic effect on conditionally pathogenic test cultures Staphylococcus аureus and Candida аlbicans. Among the isolates discovered strains which showed lipase or amylase or elastase activity. These properties of the bacteria may be used in various biotechnology.
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