Metabolism of nitric oxide in denitrifying Pseudomonas aeruginosa and 
nitrate-respiring Bacillus cereus

Kalkowski, I; Conrad, R

doi:10.1111/j.1574-6968.1991.tb04848.x

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Metabolism of nitric oxide in denitrifying Pseudomonas aeruginosa and nitrate-respiring Bacillus cereus

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Conrad, R
Department of Biogeochemistry, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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https://doi.org/10.1111/j.1574-6968.1991.tb04848.x
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Citation

Kalkowski, I., & Conrad, R. (1991). Metabolism of nitric oxide in denitrifying Pseudomonas aeruginosa and nitrate-respiring Bacillus cereus. FEMS Microbiology Letters, 82(1), 107-111. doi:10.1111/j.1574-6968.1991.tb04848.x.

Cite as: https://hdl.handle.net/21.11116/0000-000F-BE92-6

Abstract

Suspensions of Pseudomonas aeruginosa and Bacillus cereus were
continuously sparged with nitrogen to remove gaseous products of nitrate
reduction. Under these conditions, P. aeruginosa denitrified nitrate to
4% NO, 47% N2O and 49% N2. B. cereus reduced nitrate to 94% nitrite, 2%
NO and 5% N2O. B. cereus was unable to reduce NO or N2O as sole
electron acceptor, whereas P. aeruginosa reduced NO stoichiometrically
to N2O when the N2O reductase was inhibited by acetylene or when the
formed N2O was immediately flushed out of the incubation vessel. The
mechanism and the reason for NO production in nitrate-respiring B.
cereus are unknown, but the amounts of NO released were in a similar
range as in the denitrifying P. aeruginosa and thus may be of similar
environmental importance.