Activity, Diversity and Population Size of Ammonia-oxidising Bacteria in Oil-contaminated Landfarming Soil

Overview

Journal FEMS Microbiol Lett

Publisher Oxford University Press

Specialty Microbiology

Date 2005 Jul 27

PMID 16043309

Citations 34

Authors

Jukka Kurola

Mirja Salkinoja-Salonen

Tuula Aarnio

Jenni Hultman

Martin Romantschuk

Affiliations

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Abstract

Chemolithotrophic ammonia-oxidising bacteria (AOB) present in oil-contaminated landfarming soil were studied over two growing seasons in 1999 and 2000. The number of AOB (4-9 x 10(5) cellsg(-1) of dry soil) determined with the quantitative polymerase chain reaction (real-time PCR) and the rate of potential ammonium oxidation (0.05-0.28 microg NO2(-)-N g(-1) of dry soil h(-1)) indicated the presence of stable AOB populations. Denaturing gradient gel electrophoresis (DGGE) profiling and sequence analysis of PCR-amplified AOB 16S rRNA genes showed dominance of Nitrosospira-like sequences in clusters 2 and 3. The present results from the chronically oil-contaminated landfarming soil support the suggested importance of Nitrosospira-like AOB in terrestrial environments.

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