Deferribacter abyssi sp. nov., an anaerobic thermophile from deep-sea hydrothermal vents of the Mid-Atlantic Ridge
Miroshnichenko, M. L. and Slobodkin, A. I. and Kostrikina, N. A. and L'Haridon, S. and Nercessian, O. and Spring, S. and Stackebrandt, E. and Bonch-Osmolovskaya, E. A. and Jeanthon, C.,, 53, 1637-1641 (2003),
doi = https://doi.org/10.1099/ijs.0.02673-0,
publicationName = Microbiology Society,
issn = 1466-5026,
abstract= Two strains of thermophilic, anaerobic, chemolithoautotrophic bacteria, designated JRT and DR, were isolated from hydrothermal samples collected on the Mid-Atlantic Ridge from the Rainbow (36° 16′ N, 33° 54′ W) and Menez Gwen (37° 50′ N, 31° 50′ W) vent fields, respectively. Cells of both isolates were short, straight- to vibrio-shaped, motile rods with one polar flagellum, and were Gram-negative and non-sporulating. Strain JRT was characterized in detail. It was found to grow optimally at pH 6·5–6·7, at 60 °C and in the presence of 30 g NaCl l−1. Strain JRT could use molecular hydrogen, acetate, succinate, pyruvate and proteinaceous compounds as electron donors, and elemental sulfur, nitrate or Fe(III) as electron acceptors. No fermentation of organic substrates occurred. The G+C content of the DNA of strain JRT was 30·8 mol%. Strain DR (=DSM 14927) possessed the same morphology and pH, temperature and salinity optima and ranges, and used the same electron acceptors as strain JRT. On the basis of their 16S rDNA sequences (1517 nucleotides), strains JRT and DR were identical and distantly related to Deferribacter thermophilus and Deferribacter desulfuricans (95·3 and 95·2 % sequence similarity, respectively). Based on their phenotypic and phylogenetic characteristics, it is proposed that both strains are members of a new species of the genus Deferribacter, for which the name Deferribacter abyssi (type strain JRT=DSM 14873T=JCM 11955T) is proposed.,
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