RRC ID 60618
Author Kits KD, Jung MY, Vierheilig J, Pjevac P, Sedlacek CJ, Liu S, Herbold C, Stein LY, Richter A, Wissel H, Brüggemann N, Wagner M, Daims H.
Title Low yield and abiotic origin of N2O formed by the complete nitrifier Nitrospira inopinata.
Journal Nat Commun
Abstract Nitrous oxide (N2O) and nitric oxide (NO) are atmospheric trace gases that contribute to climate change and affect stratospheric and ground-level ozone concentrations. Ammonia oxidizing bacteria (AOB) and archaea (AOA) are key players in the nitrogen cycle and major producers of N2O and NO globally. However, nothing is known about N2O and NO production by the recently discovered and widely distributed complete ammonia oxidizers (comammox). Here, we show that the comammox bacterium Nitrospira inopinata is sensitive to inhibition by an NO scavenger, cannot denitrify to N2O, and emits N2O at levels that are comparable to AOA but much lower than AOB. Furthermore, we demonstrate that N2O formed by N. inopinata formed under varying oxygen regimes originates from abiotic conversion of hydroxylamine. Our findings indicate that comammox microbes may produce less N2O during nitrification than AOB.
Volume 10(1)
Pages 1836
Published 2019-4-23
DOI 10.1038/s41467-019-09790-x
PII 10.1038/s41467-019-09790-x
PMID 31015413
PMC PMC6478695
MeSH Ammonia / metabolism* Archaea / metabolism Bacteria / drug effects Bacteria / metabolism* Climate Change Cyclic N-Oxides / pharmacology Imidazoles / pharmacology Metabolic Networks and Pathways / drug effects Metabolic Networks and Pathways / physiology Nitric Oxide / metabolism* Nitrification / drug effects Nitrification / physiology Nitrous Oxide / metabolism* Oxidation-Reduction Soil Microbiology
IF 11.878
Times Cited 16
General Microbes JCM31988