Planktonic Marine Archaea

Annual Review of Marine Science, Journal Year: 2018, Volume and Issue: 11(1), P. 131 - 158

Published: Sept. 13, 2018

Archaea are ubiquitous and abundant members of the marine plankton. Once thought as rare organisms found in exotic extremes temperature, pressure, or salinity, archaea now known nearly every environment. Though frequently referred to collectively, planktonic actually comprise four major phylogenetic groups, each with its own distinct physiology ecology. Only one group—the Thaumarchaeota—has cultivated representatives, making an attractive focus point for latest developments cultivation-independent molecular methods. Here, we review ecology, physiology, biogeochemical impact archaeal groups using recent insights from cultures large-scale environmental sequencing studies. We highlight key gaps our knowledge about ecological roles carbon flow food web interactions. emphasize incredible uncultivated diversity within suggesting there is much more be done.

Language: Английский

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Current Trends in Methylotrophy

Trends in Microbiology, Journal Year: 2018, Volume and Issue: 26(8), P. 703 - 714

Published: Feb. 19, 2018

Language: Английский

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Unexpected host dependency of Antarctic Nanohaloarchaeota

Proceedings of the National Academy of Sciences, Journal Year: 2019, Volume and Issue: 116(29), P. 14661 - 14670

Published: June 28, 2019

In hypersaline environments, Nanohaloarchaeota (Diapherotrites, Parvarchaeota, Aenigmarchaeota, Nanoarchaeota, [DPANN] superphylum) are thought to be free-living microorganisms. We report cultivation of 2 strains Antarctic and show that they require the haloarchaeon Halorubrum lacusprofundi for growth. By performing growth using enrichments fluorescence-activated cell sorting, we demonstrated successful Candidatus Nanohaloarchaeum antarcticus, purification Ca. Nha. antarcticus away from other species, verification with Hrr. lacusprofundi; these findings analogous those required fulfilling Koch's postulates. use fluorescent in situ hybridization transmission electron microscopy assess structures interactions; metagenomics characterize enrichment taxa, generate metagenome assembled genomes, interrogate communities; proteomics metabolic pathways speculate about roles certain proteins. Metagenome analysis indicates presence a single which is endemic systems support haloarchaea. The unusually large proteins predicted function attachment invasion hosts plus absence key biosynthetic (e.g., lipids) genomes globally distributed indicate all members lineage have evolved as symbionts. Our work expands range archaeal symbiotic lifestyles provides genetically tractable model system advancing understanding factors controlling microbial relationships.

Language: Английский

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Insights into the ecological roles and evolution of methyl-coenzyme M reductase-containing hot spring Archaea

Nature Communications, Journal Year: 2019, Volume and Issue: 10(1)

Published: Oct. 8, 2019

Abstract Several recent studies have shown the presence of genes for key enzyme associated with archaeal methane/alkane metabolism, methyl-coenzyme M reductase (Mcr), in metagenome-assembled genomes (MAGs) divergent to existing lineages. Here, we study mcr -containing MAGs from several hot springs, which reveal further expansion diversity organisms performing metabolism. Significantly, an MAG basal phylum Thaumarchaeota that contains genes, but not those ammonia oxidation or aerobic is identified. Together, our phylogenetic analyses and ancestral state reconstructions suggest a mostly vertical evolution mcrABG among methanogens methanotrophs, along frequent horizontal gene transfer between alkanotrophs. Analysis all MAGs/genomes suggests hydrothermal origin these microorganisms based on optimal growth temperature predictions. These results also methanogenesis at high likely existed common ancestor.

Language: Английский

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Similar drivers but different effects lead to distinct ecological patterns of soil bacterial and archaeal communities

Soil Biology and Biochemistry, Journal Year: 2020, Volume and Issue: 144, P. 107759 - 107759

Published: Feb. 20, 2020

Language: Английский

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