Global diffusive fluxes of methane in marine sediments

Nature Geoscience, Journal Year: 2018, Volume and Issue: 11(6), P. 421 - 425

Published: May 11, 2018

Language: Английский

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Thermophilic archaea activate butane via alkyl-coenzyme M formation

Nature, Journal Year: 2016, Volume and Issue: 539(7629), P. 396 - 401

Published: Oct. 14, 2016

Language: Английский

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Anaerobic methane oxidation coupled to manganese reduction by members of the Methanoperedenaceae

The ISME Journal, Journal Year: 2020, Volume and Issue: 14(4), P. 1030 - 1041

Published: Jan. 27, 2020

Abstract Anaerobic oxidation of methane (AOM) is a major biological process that reduces global emission to the atmosphere. methanotrophic archaea (ANME) mediate this through coupling different electron acceptors, or in concert with syntrophic bacterial partner. Recently, ANME belonging archaeal family Methanoperedenaceae (formerly known as ANME-2d) were shown be capable AOM coupled nitrate and iron reduction. Here, freshwater sediment bioreactor fed Mn(IV) oxides (birnessite) resulted microbial community dominated by two novel members Methanoperedenaceae, biochemical profiling system demonstrating Mn(IV)-dependent AOM. Genomic transcriptomic analyses revealed expression key genes involved several shared multiheme c-type cytochromes (MHCs) differentially expressed, indicating likely use extracellular transfer pathways. We propose names “Candidatus Methanoperedens manganicus” manganireducens” for newly described species. This study demonstrates ability couple reduction oxides, which suggests their potential role linking manganese cycling environment.

Language: Английский

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Magnetite Triggering Enhanced Direct Interspecies Electron Transfer: A Scavenger for the Blockage of Electron Transfer in Anaerobic Digestion of High-Solids Sewage Sludge

Environmental Science & Technology, Journal Year: 2018, Volume and Issue: 52(12), P. 7160 - 7169

Published: May 21, 2018

At present, high-solids anaerobic digestion of sewage sludge has drawn great attention due to the superiority its small land area footprint and low energy consumption. However, a high organic loading rate may cause acids accumulation ammonia inhibition, thus leading an inhibited pseudo-steady state in which electron transfer through interspecies hydrogen (IHT) between acetogens methanogens is blocked. In this study, adding 50 mg/g TS (total solid) magnetite clearly reduced short-chain fatty accelerated methane production by 26.6%. As demonstrated, individual processes could not be improved when methanogenesis was interrupted. Analyzing stable carbon isotopes investigating pathways using acetate H2/CO2 as substrates together proved that direct (DIET) enhanced magnetite. Metatranscriptomic analysis determination key enzymes showed IHT partially substituted DIET, acetate-dependent after blockage scavenged. Additionally, expression both pili c-type cytochromes found decrease, indicating replace their roles for efficient methanogens; thus, robust chain established.

Language: Английский

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Archaea Are Interactive Components of Complex Microbiomes

Trends in Microbiology, Journal Year: 2017, Volume and Issue: 26(1), P. 70 - 85

Published: Aug. 19, 2017

Language: Английский

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