Possibility in the second substance of inter-species transfer within a novel methanogenic syntrophic community

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A novel thermophilic methanogen strain RMAST was isolated from a formation water of a natural gas field. The methanogen was eventually obtained by applying co-cultivation technique with a syntrophic acetate-oxidizing bacterium. Strain RMAST grows solely on H2-CO2 and requires sources of amino acids which were probably supplied by the syntroph within the syntrophic culture for growth. Microbiological characteristics (Figure 2) of strain RMAST indicates its mosaic character that comprises features of three different genera within the order Methanobacteriales. We propose this strain as a type strain of novel methanogen belonging to the family Methanobacteriaceae.