| Budget Amount *help |
¥25,870,000 (Direct Cost: ¥19,900,000、Indirect Cost: ¥5,970,000)
Fiscal Year 2019: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2018: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2017: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
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| Outline of Final Research Achievements |
Until now, the oxidation of ammonia to nitrous acid and nitric acid has been considered to be a process that progresses in the presence of oxygen by nitrifying bacteria. However, it is possibility that anoxygenic photosynthetic bacteria can use ammonia as an electron donor for their photosynthetic electron transfer in addition to nitrite, but no photosynthetic bacteria capable of anaerobically oxidizing ammonia have been discovered.
In this study, we succeeded in culturing a marine or thermophilic anoxygenic photosynthetic bacterium capable of oxidizing ammonia under anaerobic conditions from natural environments such as the ocean and hot springs. It has not been clarified what the intermediate products associated with the ammonia oxidation in these bacteria are, but it can be said that these are the first culture examples in the world.
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