Abstract Methanonatronarchaeia represents a deep‐branching phylogenetic lineage of extremely halo(alkali)philic and moderately thermophilic methyl‐reducing methanogens belonging to the phylum Halobacteriota . It includes two genera, the alkaliphilic Methanonatronarchaeum and the neutrophilic Ca. Methanohalarchaeum. The former is represented by multiple closely related pure culture isolates from hypersaline soda lakes, while the knowledge about the latter is limited to a few mixed cultures with anaerobic haloarchaea. To get more insight into the distribution and ecophysiology of this enigmatic group of extremophilic methanogens, potential activity tests and enrichment cultivation with different substrates and at different conditions were performed with anaerobic sediment slurries from various hypersaline lakes in Russia. Methanonatronarchaeum proliferated exclusively in hypersaline soda lake samples mostly at elevated temperature, while at mesophilic conditions it coexisted with the extremely salt‐tolerant
📖 افتح في inklap 🔗 DOI 📮 اطلب بحثاً