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Archaea predominate among ammonia-oxidizing prokaryotes in soils
Ammonia oxidation is the first step in nitrification, a key process in the global nitrogen cycle that results in the formation of nitrate through microbial activity. The increase in nitrateExpand
The influence of soil pH on the diversity, abundance and transcriptional activity of ammonia oxidizing archaea and bacteria.
Autotrophic ammonia oxidation occurs in acid soils, even though laboratory cultures of isolated ammonia oxidizing bacteria fail to grow below neutral pH. To investigate whether archaea possessingExpand
Complex archaea that bridge the gap between prokaryotes and eukaryotes
The origin of the eukaryotic cell remains one of the most contentious puzzles in modern biology. Recent studies have provided support for the emergence of the eukaryotic host cell from within theExpand
Novel genes for nitrite reductase and Amo-related proteins indicate a role of uncultivated mesophilic crenarchaeota in nitrogen cycling.
Mesophilic crenarchaeota are frequently found in terrestrial and marine habitats worldwide, but despite their considerable abundance the physiology of these as yet uncultivated archaea has remainedExpand
Nitrososphaera viennensis, an ammonia oxidizing archaeon from soil
Genes of archaea encoding homologues of ammonia monooxygenases have been found on a widespread basis and in large amounts in almost all terrestrial and marine environments, indicating that ammoniaExpand
Pathways of Carbon Assimilation and Ammonia Oxidation Suggested by Environmental Genomic Analyses of Marine Crenarchaeota
Marine Crenarchaeota represent an abundant component of oceanic microbiota with potential to significantly influence biogeochemical cycling in marine ecosystems. Prior studies using specific archaealExpand
Distinct gene set in two different lineages of ammonia-oxidizing archaea supports the phylum Thaumarchaeota.
Globally distributed archaea comprising ammonia oxidizers of moderate terrestrial and marine environments are considered the most abundant archaeal organisms on Earth. Based on 16S rRNA phylogeny,Expand
Diversity and abundance of Crenarchaeota in terrestrial habitats studied by 16S RNA surveys and real time PCR.
Novel phylogenetic lineages of as yet uncultivated crenarchaeota have been frequently detected in low to moderate-temperature, marine and terrestrial environments. In order to gain a moreExpand
The Thaumarchaeota: an emerging view of their phylogeny and ecophysiology
Thaumarchaeota range among the most abundant archaea on Earth. Initially classified as ‘mesophilic Crenarchaeota’, comparative genomics has recently revealed that they form a separate andExpand
Screening for Sulfolobales, their plasmids and their viruses in Icelandic solfataras
Summary We have sampled acidic springs, water and mud holes of 14 major solfataric fields of Iceland in order to isolate both heterotrophic and autotrophic members of the order Sulfolobales and toExpand