Twenty-one strains of spore-forming bacteria were isolated from marine sediments of the Tyrrhenian seaboard (Livorno, Italy) and identified asBacillus licheniformis by their morphological, physiological and biochemical characteristics. All strains were able to grow at 15% NaCl and on media prepared with 100% seawater. In these conditions 75% of the strains were able to produce a bacitracin-like antibiotic and 100% of the strains showed proteolytic activity. Particularly, all strains showed proteinase production with an activity optimum at pH 8.5 and 60°C. Three strains produced high levels of proteolytic activity only when cultured in the presence of seawater.
PROTEINASE PRODUCTION BY HALOPHILIC ISOLATES FROM MARINE-SEDIMENTS / P. MANACHINI, M. FORTINA. - In: FOLIA MICROBIOLOGICA. - ISSN 0015-5632. - 39:5(1994), pp. 378-380. [10.1007/BF02814442]
PROTEINASE PRODUCTION BY HALOPHILIC ISOLATES FROM MARINE-SEDIMENTS
P. ManachiniPrimo
;M. FortinaUltimo
1994
Abstract
Twenty-one strains of spore-forming bacteria were isolated from marine sediments of the Tyrrhenian seaboard (Livorno, Italy) and identified asBacillus licheniformis by their morphological, physiological and biochemical characteristics. All strains were able to grow at 15% NaCl and on media prepared with 100% seawater. In these conditions 75% of the strains were able to produce a bacitracin-like antibiotic and 100% of the strains showed proteolytic activity. Particularly, all strains showed proteinase production with an activity optimum at pH 8.5 and 60°C. Three strains produced high levels of proteolytic activity only when cultured in the presence of seawater.
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