Elucidation of hybrid N2O production mechanisms by ammonia-oxidizing bacteria

2017 Fiscal Year Final Research Report

• Project/Area Number: 26701003
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: Hiroshima University
• Principal Investigator: Katsuyama Chie 広島大学, 総合科学研究科, 助教 (10580061)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 窒素安定同位体トレーサー / 亜酸化窒素 / アンモニア酸化細菌 / Nitrosomonas / 硝化 / 脱窒 / 窒素循環 / ガスクロマトグラフ質量分析計

Outline of Final Research Achievements

Mechanisms of hybrid nitrous oxide (N2O) production by aerobic ammonia-oxidizing bacteria, a combination of one nitrogen from hydroxylamine and the other from nitrite, were analyzed by using 15N tracer. In the presence of nitrite, hybrid N2O was aerobically produced with hydroxylamine from ammonia, but not with ammonia directly. Processing ammonia and N-oxides and ratio of hybrid N2O in total N2O production were different between Nitrosomonas strains.

Free Research Field

微生物生態学