A-06 赤潮発生時の海水中に存在する懸濁粒子付着性の脱窒細菌と浮遊性脱窒細菌 : N_2O reductase遺伝子(nosZ)の比較(水圏生態系,口頭発表)

概要

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We have studied the eco-physiology of denrtrifiers in marine habitats, especially in seawater columns where N_2O accumulation is sometimes observed. Based on some observations, which relate the increase of denitrifying bacteria and the occurrence of high N_2O seawater mass with the algal blooming, we make the hypothesis that the bacteria can denitrify in the anaerobic microhabitat around particles derived from algal cells. In this study, we enumerated denitrifying bacteria in two fractions, particle-associated and free-living, of the seawater, where diatoms were blooming, and analyzed the diversity ofnosZ (N_2O reductase gene) in each fraction. From the result, we concluded that unique denitrifiers, different from free-living ones, were living in association with particules, but the number of those were not so many comparing with free-living denitrifiers.
日本微生物生態学会の論文
2005-10-30