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Archaea predominate among ammonia-oxidizing prokaryotes in soils
It is shown that archaeal ammonia oxidizers are more abundant in soils than their well-known bacterial counterparts, and crenarchaeota may be the most abundant ammonia-oxidizing organisms in soil ecosystems on Earth.
The influence of soil pH on the diversity, abundance and transcriptional activity of ammonia oxidizing archaea and bacteria.
- G. Nicol, S. Leininger, C. Schleper, J. Prosser
- Biology, MedicineEnvironmental Microbiology
- 1 November 2008
Findings suggest that different bacterial and archaeal ammonia oxidizer phylotypes are selected in soils of different pH and that these differences in community structure and abundances are reflected in different contributions to ammonia oxidation activity.
Complex archaea that bridge the gap between prokaryotes and eukaryotes
The discovery of ‘Lokiarchaeota’ is described, a novel candidate archaeal phylum which forms a monophyletic group with eukaryotes in phylogenomic analyses, and whose genomes encode an expanded repertoire of eUKaryotic signature proteins that are suggestive of sophisticated membrane remodelling capabilities.
Nitrososphaera viennensis, an ammonia oxidizing archaeon from soil
- M. Tourna, M. Stieglmeier, C. Schleper
- BiologyProceedings of the National Academy of Sciences
- 27 April 2011
The cultivation and isolation of an AOA from soil is described, showing it grows on ammonia or urea as an energy source and is capable of using higher ammonia concentrations than the marine isolate, Nitrosopumilus maritimus.
Novel genes for nitrite reductase and Amo-related proteins indicate a role of uncultivated mesophilic crenarchaeota in nitrogen cycling.
- A. H. Treusch, S. Leininger, A. Kletzin, S. Schuster, H. Klenk, C. Schleper
- BiologyEnvironmental Microbiology
- 1 December 2005
These findings suggest that mesophilic terrestrial and marine crenarchaeota might be capable of ammonia oxidation under aerobic and potentially also under anaerobic conditions.
Pathways of Carbon Assimilation and Ammonia Oxidation Suggested by Environmental Genomic Analyses of Marine Crenarchaeota
Analysis of fosmid sequences derived from the uncultivated marine crenarchaeote, Cenarchaeum symbiosum, focused on the reconstruction of carbon and energy metabolism substantiate the likely global metabolic importance of Cren archaeal importance with respect to key steps in the biogeochemical transformation ofcarbon and nitrogen in marine ecosystems.
Distinct gene set in two different lineages of ammonia-oxidizing archaea supports the phylum Thaumarchaeota.
The Thaumarchaeota: an emerging view of their phylogeny and ecophysiology
Diversity and abundance of Crenarchaeota in terrestrial habitats studied by 16S RNA surveys and real time PCR.
- T. Ochsenreiter, Drazenka Selezi, A. Quaiser, Liza Bonch-Osmolovskaya, C. Schleper
- Environmental ScienceEnvironmental Microbiology
- 1 September 2003
The data suggest that soil crenarchaeota represent a stable and specific component of the microbiota in terrestrial habitats and establish a rapid method to quantify archaeal 16S rDNA in real time PCR.
Genomic studies of uncultivated archaea
Genetic studies of uncultivated archaea are reviewed within a framework of the phylogenetic diversity and ecological distribution of this domain to reveal considerable heterogeneity among archaeal strains.