ISSN:
1432-072X
Keywords:
Key words:Desulfurella– Volcanic environments – Sulfur respiration – Thermophilic eubacterium – Hydrogen – Fatty acids
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract. A new moderately thermophilic sulfur-reducing eubacterium was isolated from bottom deposits of Green Lake (Raoul Island, Kermadec archipelago, New Zealand). Cells are short rods, 1.5 – 1.8 by 0.5 – 0.7 µm, single or in pairs, motile with one polar flagellum, gram-negative with S-layer of subunit structure. Growth occurred between 42 and 77 °C with the optimum at 58 – 60 °C and at pH from 6.0 to 7.2 with the optimum at 6.4 – 6.8. The bacterium was obligately anaerobic and obligately sulfur-respiring, and capable of lithoautotrophic growth on a mineral medium with S° and H2/CO2 gas phase. In addition to molecular hydrogen, a wide range of substrates can be utilized as energy source in the presence of elemental sulfur: pyruvate, acetate, butyrate, pentadecanate, palmitate, stearate. Products are CO2 and H2S. The G+C content of DNA is 33.5 mol%. DNA-DNA homology with the type species of the genus Desulfurella–Desulfurella acetivorans– is 69±25%. A new species, Desulfurella multipotens sp. nov., with the type strain RH-8 is described.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00248898
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