Subgroup level differences of physiological activities in marine Lokiarchaeota.
Subgroup level differences of physiological activities in marine Lokiarchaeota.
复制标题
海洋古菌生理活性亚群水平差异
DOI:
10.1038/s41396-020-00818-5
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发表时间:
2021-03
期刊:
影响因子:
--
通讯作者:
Friedrich MW
中科院分区:
文献类型:
--
作者:
Yin X;Cai M;Liu Y;Zhou G;Richter-Heitmann T;Aromokeye DA;Kulkarni AC;Nimzyk R;Cullhed H;Zhou Z;Pan J;Yang Y;Gu JD;Elvert M;Li M;Friedrich MW
Asgard is a recently discovered archaeal superphylum, closely linked to the emergence of eukaryotes. Among Asgard archaea, Lokiarchaeota are abundant in marine sediments, but their in situ activities are largely unknown except for Candidatus ‘Prometheoarchaeum syntrophicum’. Here, we tracked the activity of Lokiarchaeota in incubations with Helgoland mud area sediments (North Sea) by stable isotope probing (SIP) with organic polymers, 13C-labelled inorganic carbon, fermentation intermediates and proteins. Within the active archaea, we detected members of the Lokiarchaeota class Loki-3, which appeared to mixotrophically participate in the degradation of lignin and humic acids while assimilating CO2, or heterotrophically used lactate. In contrast, members of the Lokiarchaeota class Loki-2 utilized protein and inorganic carbon, and degraded bacterial biomass formed in incubations. Metagenomic analysis revealed pathways for lactate degradation, and involvement in aromatic compound degradation in Loki-3, while the less globally distributed Loki-2 instead rely on protein degradation. We conclude that Lokiarchaeotal subgroups vary in their metabolic capabilities despite overlaps in their genomic equipment, and suggest that these subgroups occupy different ecologic niches in marine sediments.
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