Physiological Stress Response to Sulfide Exposure of Freshwater Anaerobic Methanotrophic Archaea.

ABSTRACT: Freshwater wetlands and coastal sediments are becoming hotspots for the emission of the greenhouse gas methane. Eutrophication-induced deposition of organic matter leads to elevated methanogenesis and sulfate reduction, thereby increasing the concentrations of methane and toxic sulfide, respectively. However, the effects of sulfide stress on the anaerobic methanotrophic biofilter have not been well explored. Here, we show how an enrichment culture dominated by the freshwater anaerobic methane-oxidizing archaeon "Candidatus (Ca.) Methanoperedens" responds to short-term and long-term exposure to sulfide in a bioreactor. The methane-oxidizing activity decreased to 45% and 20% but partially recovered to 70% and 30% within 5 days after short- and long-term sulfide exposure, respec

SUBMITTER: Echeveste Medrano MJ 

PROVIDER: S-EPMC12138975 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature