海洋中の無機態窒素化合物利用微生物に関する研究-II

無機態窒素化合物同化従属栄養細菌について

抄録

1. The distribution of the marine heterotrophic bacteria assimilating inorganic nitrogen compounds in Maizuru Bay were investigated, the methods to count and assort the bacteria being clarified.
2. The counts of the bacteria are comparatively large in bottom muds and sea water, i.e. 10³-10⁵ cells/g and 10⁰-10² cells/ml, respectively.
3. As to the percentages of the bacteria to total heterotrophic bacteria, the type 1 which assimilates NH₃-N, N0₂-N and N0₃-N and the type 7 which does only NH₃-N were compar-atively high, i.e. 2-40% and 0-20%, respectively. Further, these percentages of the bacteria in sea water were smaller as compared with those in bottom muds.