AN OBLIGATELY PSYCHROPHILIC BACTERIUM ISOLATED ON THE HOKKAIDO COAST

Abstract
An attempt was made to elucidate whether any psychrophilic bacteria inhabited the Hokkaido coast [Japan] in winter. An obligately psychrophilic strain of bacteria was isolated from sea water several meters offshore of Abashiri city in Hokkaido. This strain resembled Vibrio marinus [fischeri] in many morphological and physiological properties. Optimum and maximum temperatures for growth were about 15.degree. C and below 25.degree. C, respectively. This psychrophile was also halophilic and required about 0.4M NaCl for maximum growth. Morphological change was observed in the cultures at 10.degree., 15.degree. and 20.degree. C, particularly in the young stage at 20.degree. C.

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