Microbes and Environments
Online ISSN : 1347-4405
Print ISSN : 1342-6311
ISSN-L : 1342-6311
Research Articles
Co-Culture of a Methanogenic Archaeon and a Methanotrophic Bacterium on Sterilized Soil in Large Test Tubes: Design for Soil-Mediated Co-Culture
Dayéri DianouKatsuki Adachi
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2001 Volume 16 Issue 4 Pages 222-226


In a design utilizing a sterilized soil-mediated co-culture of methanogenic archaeon and methanotrophic bacterium, the activities of both the methanogen and methanotroph were examined. It was confirmed that CH4 was produced by the methanogen after methanotrophic inoculation and suggested that this CH4 was oxidized by the methanotroph as the concentration of O2 increased, although emission of CH4 itself was indirect proof of CH4-oxidizing activity. On the other hand, in the control treatment, methanogenic inoculation without methanotrophic inoculation at different levels of O2, CH4 was not emitted (there was no activity to produce CH4). These results suggest a symbiotic relation in this co-culture system, because the methanogen provided CH4 to the methanotroph, while inoculation of the methanotroph was necessary for subsequent production of CH4 by the methanogen. The development of co-culture systems is essential for understanding the close relationship and interaction between methanogens and the methanotrophs in natural and agricultural environments.

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© Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology
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