Unknown

Dataset Information

0

A long-term cultivation of an anaerobic methane-oxidizing microbial community from deep-sea methane-seep sediment using a continuous-flow bioreactor.


ABSTRACT: Anaerobic oxidation of methane (AOM) in marine sediments is an important global methane sink, but the physiological characteristics of AOM-associated microorganisms remain poorly understood. Here we report the cultivation of an AOM microbial community from deep-sea methane-seep sediment using a continuous-flow bioreactor with polyurethane sponges, called the down-flow hanging sponge (DHS) bioreactor. We anaerobically incubated deep-sea methane-seep sediment collected from the Nankai Trough, Japan, for 2,013 days in the bioreactor at 10°C. Following incubation, an active AOM activity was confirmed by a tracer experiment using 13C-labeled methane. Phylogenetic analyses demonstrated that phylogenetically diverse Archaea and Bacteria grew in the bioreactor. After 2,013 days of incubation, the predominant archaeal components were anaerobic methanotroph (ANME)-2a, Deep-Sea Archaeal Group, and Marine Benthic Group-D, and Gammaproteobacteria was the dominant bacterial lineage. Fluorescence in situ hybridization analysis showed that ANME-1 and -2a, and most ANME-2c cells occurred without close physical interaction with potential bacterial partners. Our data demonstrate that the DHS bioreactor system is a useful system for cultivating fastidious methane-seep-associated sedimentary microorganisms.

PROVIDER: S-EPMC4139340 | BioStudies |

REPOSITORIES: biostudies

Similar Datasets

| S-EPMC4814501 | BioStudies
| S-EPMC7360803 | BioStudies
| S-EPMC4736303 | BioStudies
| S-EPMC3245565 | BioStudies
| S-EPMC5029187 | BioStudies
| S-EPMC4309696 | BioStudies
| S-EPMC8027057 | BioStudies
| S-EPMC5739000 | BioStudies
| S-EPMC7414198 | BioStudies
| S-EPMC7082337 | BioStudies