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Stremińska, Marta A., Felgate, Heather, Rowley, Gary 
ORCID: https://orcid.org/0000-0002-5421-4333, Richardson, David J. ORCID: https://orcid.org/0000-0002-6847-1832 and Baggs, Elizabeth M.
(2012)
Nitrous oxide production in soil isolates of nitrate-ammonifying bacteria.
Environmental Microbiology Reports, 4 (1).
pp. 66-71.
ISSN 1758-2229
Abstract
Here we provide the first demonstration of the potential for N2O production by soil-isolated nitrate-ammonifying bacteria under different C and N availabilities, building on characterizations informed from model strains. The potential for soil-isolated Bacillus sp. and Citrobacter sp. to reduce NO3-, and produce NH4+, NO2- and N2O was examined in batch and continuous (chemostat) cultures under different C-to-NO3- ratios, NO3--limiting (5 mM) and NO3--sufficient (22 mM) conditions. C-to-NO3- ratio had a major influence on the products of nitrate ammonification, with NO2-, rather than NH4+, being the major product at low C-to-NO3- ratios in batch cultures. N2O production was maximum and accompanied by high NO2- production under C-limitation/NO3-sufficiency conditions in chemostat cultures. In media with lower C-to-NO3-N ratios (5- and 10-to-1) up to 2.7% or 5.0% of NO3- was reduced to N2O by Bacillus sp. and Citrobacter sp., respectively, but these reduction efficiencies were only 0.1% or 0.7% at higher C-to-NO3- ratios (25- and 50-to-1). As the highest N2O production did not occur under the same C-to-NO3- conditions as highest NH4+ production we suggest that a re-evaluation may be necessary of the environmental conditions under which nitrate ammonification contributes to N2O emission from soil.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Biological Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Molecular Microbiology Faculty of Science > Research Groups > Organisms and the Environment Faculty of Science > Research Centres > Centre for Molecular and Structural Biochemistry Faculty of Medicine and Health Sciences > Research Groups > Pathogen Biology Group |
| Depositing User: | Users 2731 not found. |
| Date Deposited: | 09 Jan 2012 14:02 |
| Last Modified: | 24 Sep 2024 09:06 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/35964 |
| DOI: | 10.1111/j.1758-2229.2011.00302.x |
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