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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sinninghe Damsté, Jaap S. Daims, Holger Müller, Anneliese Nielsen, Jeppe L. Head, Ian M. Mussmann, Marc Pitcher, Angela Hatzenpichler, Roland Wagner, Michael Richter, Andreas Brito, Ivana Nielsen, Per Halkjær |
| Spatial Coverage | Europe |
| Description | Author Affiliation: Mussmann M ( Department of Microbial Ecology, University of Vienna, 1090 Vienna, Austria.); |
| Abstract | Nitrification is a core process in the global nitrogen cycle that is essential for the functioning of many ecosystems. The discovery of autotrophic ammonia-oxidizing archaea (AOA) within the phylum Thaumarchaeota has changed our perception of the microbiology of nitrification, in particular since their numerical dominance over ammonia-oxidizing bacteria (AOB) in many environments has been revealed. These and other data have led to a widely held assumption that all amoA-encoding members of the Thaumarchaeota (AEA) are autotrophic nitrifiers. In this study, 52 municipal and industrial wastewater treatment plants were screened for the presence of AEA and AOB. Thaumarchaeota carrying amoA were detected in high abundance only in four industrial plants. In one plant, thaumarchaeotes closely related to soil group I.1b outnumbered AOB up to 10,000-fold, and their numbers, which can only be explained by active growth in this continuous culture system, were two to three orders of magnitude higher than could be sustained by autotrophic ammonia oxidation. Consistently, (14)CO(2) fixation could only be detected in AOB but not in AEA in actively nitrifying sludge from this plant via FISH combined with microautoradiography. Furthermore, in situ transcription of archaeal amoA, and very weak in situ labeling of crenarchaeol after addition of (13)CO(2), was independent of the addition of ammonium. These data demonstrate that some amoA-carrying group I.1b Thaumarchaeota are not obligate chemolithoautotrophs. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 40 |
| Volume Number | 108 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2011-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Ammonia Metabolism Archaea Enzymology Extraction And Processing Industry Oxidoreductases Genetics Waste Products Water Purification Autoradiography Cluster Analysis DNA Primers Glyceryl Ethers In Situ Hybridization, Fluorescence Likelihood Functions Models, Genetic Molecular Sequence Data Oxidation-Reduction Polymerase Chain Reaction RNA, Ribosomal, 16S Sequence Analysis, DNA Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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