海洋細菌に及ぼす銅の影響-I : 硫酸銅の生育抑制作用
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概要
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In 1943, WARSMAN described the effect of copper upon the development of bacteria in sea water, and he isolated the specific ”copper bacteria” that had a definite affinity for copper from sea water and surface film. The present author studied on the bacteriostatic or bacteriocidal effect of the various concentrations of copper sulfate upon the development of marine bacterial community in sea water. The results of the investigation is summerized as follows : (1) When the copper sulfate dissolved into the crude sea water, the develelopment of marine bacteria was completely depressed in the conentration of 500ppm. within three days. The addition of lesser amounts of copper sulfate than 200ppm., however, retarded the bacterial development for only one or two days, and then this depressing effect was overcome after three days and the rapid development of bacteria resulted. (Table 1, 2) (2) On the other hand, the addition of copper sulfate to the Reuszers medium had the bacteriostatic or bacteriocidal effect upon the most of marine bacterial strains in the concentration of 300ppm.. The specific ”copper bacteria” isolated from sea water of Aburatsubo Bay, however, develop-ed well in 400ppm.. (Table 3, 4, 5) It might be suggested that the ”copper bacteria” tolerate fairly well against copper, and as to the other strains, the Gram-negative strains seem to be slightly stronger than the Gram-positive ones, and among those the agar-digesting strains slightly weaker than the other Gram-negative ones. (3) The addition of copper sulfate to the sea water medium influenced upon the viability of marine bacterial strains ; as to the most of them, they seemed to be weakened to one-third of the normal condition in the concentration of 200ppm., while as to the ”copper bacteria” to two-thirds in 200ppm., and to one-sixth even in 400ppm.. (Table 6)
- 公益社団法人 日本水産学会の論文