論文 - 詳細
| RRC ID | 60324 |
|---|---|
| 著者 | Bayer B, Hansman RL, Bittner MJ, Noriega-Ortega BE, Niggemann J, Dittmar T, Herndl GJ. |
| タイトル | Ammonia-oxidizing archaea release a suite of organic compounds potentially fueling prokaryotic heterotrophy in the ocean. |
| ジャーナル | Environ Microbiol |
| Abstract |
Ammonia-oxidizing archaea (AOA) constitute a considerable fraction of microbial biomass in the global ocean, comprising 20%-40% of the ocean's prokaryotic plankton. However, it remains enigmatic to what extent these chemolithoautotrophic archaea release dissolved organic carbon (DOC). A combination of targeted and untargeted metabolomics was used to characterize the exometabolomes of three model AOA strains of the Nitrosopumilus genus. Our results indicate that marine AOA exude a suite of organic compounds with potentially varying reactivities, dominated by nitrogen-containing compounds. A significant fraction of the released dissolved organic matter (DOM) consists of labile compounds, which typically limit prokaryotic heterotrophic activity in open ocean waters, including amino acids, thymidine and B vitamins. Amino acid release rates corresponded with ammonia oxidation activity and the three Nitrosopumilus strains predominantly released hydrophobic amino acids, potentially as a result of passive diffusion. Despite the low contribution of DOC released by AOA (~0.08%-1.05%) to the heterotrophic prokaryotic carbon demand, the release of physiologically relevant metabolites could be crucial for microbes that are auxotrophic for some of these compounds, including members of the globally abundant and ubiquitous SAR11 clade. |
| 巻・号 | 21(11) |
| ページ | 4062-4075 |
| 公開日 | 2019-11-1 |
| DOI | 10.1111/1462-2920.14755 |
| PMID | 31336026 |
| PMC | PMC6899801 |
| MeSH | Ammonia / metabolism* Archaea / metabolism* Carbon / metabolism Chemoautotrophic Growth / physiology Heterotrophic Processes / physiology* Oceans and Seas Organic Chemicals / metabolism* Oxidation-Reduction Phylogeny |
| IF | 5.147 |
| 引用数 | 4 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
|
| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 23 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| 一般微生物 | JCM32270 JCM32271 |