Anabaena macrosporaの増殖特性とジオスミン産生について
1990 年 36 巻 1 号 p. 21-27
詳細
1990 年 36 巻 1 号 p. 21-27
To elucidate the cause of the earthy-musty odor occurring in August in 1987 in Lake Mikawa, the optimum conditions were studied for the growth and geosmin production by the blue-green algae, Anabaena macrospora. Anabaena macrospora isolated from the water of Lake Mikawa was cultured in such three different media as CT, M-11 and BG-11 media. The growth and geosmin production by Anabaena macrospora were promoted only in the CT medium. The optimum growth and geosmin production were obtained when cultured at a temperature of 28°C, at pH 8 and under light intensity of 1500 lux. At 4-week culture under these conditions, the volume of chlorophyll a and the production of geosmin attained to be 1.06 mg/l and 174 ng/ml, respectively.
