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Applied and Environmental Microbiology, May 2008, p. 3279-3283, Vol. 74, No. 10
0099-2240/08/$08.00+0     doi:10.1128/AEM.02802-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Archaea Dominate the Ammonia-Oxidizing Community in the Rhizosphere of the Freshwater Macrophyte Littorella uniflora{triangledown}

Martina Herrmann,1 Aaron M. Saunders,2 and Andreas Schramm1*

Department of Biological Sciences, Microbiology, University of Aarhus, Ny Munkegade, Building 1540, DK-8000 Aarhus C, Denmark,1 Department of Chemistry and Water Technology, Danish Technological Institute, Kongsvang Allé 29, DK-8000 Aarhus C, Denmark2

Received 12 December 2007/ Accepted 7 March 2008

Archaeal and bacterial ammonia monooxygenase genes (amoA) had similar low relative abundances in freshwater sediment. In the rhizosphere of the submersed macrophyte Littorella uniflora, archaeal amoA was 500- to >8,000-fold enriched compared to bacterial amoA, suggesting that the enhanced nitrification activity observed in the rhizosphere was due to ammonia-oxidizing Archaea.

* Corresponding author. Mailing address: Department of Biological Sciences, Microbiology, University of Aarhus, Ny Munkegade, Building 1540, DK-8000 Aarhus C, Denmark. Phone: 45 8942 3248. Fax: 45 8942 2722. E-mail: andreas.schramm{at}biology.au.dk

{triangledown} Published ahead of print on 14 March 2008.

Applied and Environmental Microbiology, May 2008, p. 3279-3283, Vol. 74, No. 10
0099-2240/08/$08.00+0     doi:10.1128/AEM.02802-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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