1887

Abstract

Two methanogenic strains, 8-2 and 4-1, with rod-shaped (0·4–0·5×3–5 μm), non-motile cells, sometimes observed in chains, were isolated from two anaerobic digesters in Beijing, China. The two strains used H/CO and formate for growth and produced methane. The temperature range for growth was 25–50 °C, with fastest growth at 37 °C. The pH ranges for growth and methane production were 6·5–8·0 for strain 8-2 and 6·8–8·6 for strain 4-1, with the fastest growth at pH 7·2 for strain 8-2 and pH 7·5–7·7 for strain 4-1. The G+C content of genomic DNA for strain 8-2 was 38·9 mol%. The similarity levels of the 16S rRNA sequence of strain 8-2 with other species of the genus ranged from 93·8 to 96·0 %. Based on the phylogenetic analysis and phenotypic characteristics, the novel species sp. nov. is proposed, with the type strain 8-2 (=DSM 15999=CGMCC 1.5011).

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2005-01-01
2020-01-21
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