Subgroup level differences of physiological activities in marine Lokiarchaeota.

ABSTRACT: 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 Lokiarc

SUBMITTER: Yin X 

PROVIDER: S-EPMC8027215 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature