Pyridine metabolism by a denitrifying bacterium

Z. Ronen, J. M. Bollag

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A denitrifying bacterium capable of pyridine degradation was isolated from contaminated soil. The Gram-negative bacterium, which was identified as an Alcaligenes sp., rapidly metabolized pyridine under anaerobic conditions with nitrate as electron acceptor. [14C]pyridine was converted to 14CO2, unidentified polar metabolic products, and labeled biomass. During pyridine metabolism, nitrate was reduced to nitrogen gas via nitrite and nitrous oxide. The molar ratio of pyridine to nitrate strongly affected pyridine metabolism. Maximum pyridine degradation occurred at a nitrate concentration above 5 mM, a temperature of 22-36°C, and a pH of 6.8-8.0.

Original languageEnglish
Pages (from-to)725-729
Number of pages5
JournalCanadian Journal of Microbiology
Volume37
Issue number10
DOIs
StatePublished - 1 Jan 1991
Externally publishedYes

Keywords

  • Alcaligenes sp.
  • anaerobic metabolism
  • denitrifying bacteria
  • pyridine

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