日本沿岸海域に分布する好気性コラ-ゲン分解細菌-1-単離と計数

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From the coastal areas of Fukuoka, Mie, and Ishikawa prefectures and the Hokkaido district, from 1973 through 1977, samples were collected of surface sea water, bottom sand and mud, zoo- and phytoplankton, algae, fish, and invertebrates (259 samples in all). First, a search was undertaken for aerobic bacteria (including facultatively anaerobic ones) capable of liquefying acid-soluble collagen gel. Two hundred and thirty-six strains of such bacteria were isolated as pure cultures and stored. The culture fluids of all isolates could release enzymatically water-soluble peptides containing hydroxyproline from insoluble collagen. Thus, it was established that aerobic collagenolytic bacteria were distributed widely in the coastal area. Next, the proportion of collagenolytic bacteria to the population of heterotrophic bacteria in surface water, bottom sand and mud, and algae was determined; the respective values of 34.8%, 5.3%, and 15.4% were obtained. Thus the average population density of aerobic collagenolytic bacteria in these coastal areas of Japan were 2.2×104cells/ml water, 2.0×104cells/g bottom sand and mud, and 3.3×106cells/g algae.
日本水産學會の論文