关键词: 北极;海冰细菌;盐度;盐耐受性

Abstract:

8 strains of bacteria were isolated from Arctic sea ice collected during Chinese Second Arctic Scientific Expedition. The effects of salinity on the growth of these strains were studied in this paper. The results showed that the bacteria isolated from sea ice had extensive salinity tolerance. They could grow quickly in salinity from 30 to 90, of these strain, BJ2, BJ3 and BJ7 showed higher salinity tolerance. The further study showed that these 3 strains could grow in a wide range salinity from 0 to 150, and they could grow temporarily even in salinity as high as 180. The lag growth phase, as well as the stationary phase was delayed with the increase of salinity. Temperature had some effects on the salinity tolerance of strain BJ2, BJ3 and BJ7. The higher the temperature, the more slowly the 3 strains grew. High temperature also could en-chance the salinity tolerance of the 3 strains in a way.