びわ湖におけるグリコ-ル酸利用細菌の季節的消長〔英文〕

概要

論文の詳細を見る
As an attempt to make clear the process by which glycollate-utilizing bacteria become dominant in the photosynthetic layer of the water column of Lake Biwa in summer, we studied the physiological characteristics of glycollate-utilizing bacteria which were isolated from water samples collected at different depths in Lake Biwa. All the strains of glycollate-utilizing bacteria isolated from the Lake Biwa waters showed better growth in media containing casamino acids as carbon and nitrogen sources than in media which contained sodium ammonium phosphate as the sole source of nitrogen, and glycollate, acetate or glucose as the sole source of carbon. From the growth patterns in the media containing each of these three carbon sources, the glycollate-utilizing bacteria were divided into five types. The population of the bacteria which showed relatively abundant growth in media containing glycollate and which required organic nitrogen sources for good growth increased in the photosynthetic layer in summer. Based on the physiological characteristics of the types mentioned above, the reason why glycollate-utilizing bacteria become dominant in the photosynthetic layer in summer was discussed.
日本水産學會の論文