Geoglobus acetivorans sp nov., an iron(III)-reducing archaeon from a deep-sea hydrothermal vent

Type Article
Date 2009-11
Language English
Author(s) Slobodkina G. B.1, Kolganova T. V.2, Querellou Joel3, Bonch-Osmolovskaya E. A.1, Slobodkin A. I.1
Affiliation(s) 1 : Russian Acad Sci, Winogradsky Inst Microbiol, Moscow 117312, Russia.
2 : Russian Acad Sci, Ctr Bioengn, Moscow 117312, Russia.
3 : IFREMER, Ctr Brest, UMR 6197, F-29280 Plouzane, France.
Source International journal of systematic and evolutionary microbiology (1466-5026) (Society for General Microbiology), 2009-11 , Vol. 59 , P. 2880-2883
DOI 10.1099/ijs.0.011080-0
WOS© Times Cited 35
Keyword(s) dissimilatory reduction, microorganisms, gradient
Abstract A hyperthermophilic, anaerobic, dissimilatory Fe(III)-reducing, facultatively chemolithoautotrophic archaeon (strain SBH6(T)) was isolated from a hydrothermal sample collected from the deepest of the known World Ocean hydrothermal fields, Ashadze field (12 degrees 58' 21 '' N 44 degrees 51' 47 '' W) on the Mid-Atlantic Ridge, at a depth of 4100 m. The strain was enriched using acetate as the electron donor and Fe(III) oxide as the electron acceptor. Cells of strain SBH6(T) were irregular cocci, 0.3-0.5 mu m in diameter. The temperature range for growth was 50-85 degrees C, with an optimum at 81 degrees C. The pH range for growth was 5.0-7.5, with an optimum at pH 6.8. Growth of SBH6(T) was observed at NaCl concentrations ranging from 1 to 6 % (w/v) with an optimum at 2.5 % (w/v). The isolate utilized acetate, formate, pyruvate, fumarate, malate, propionate, butyrate, succinate, glycerol, stearate, palmitate, peptone and yeast extract as electron donors for Fe(III) reduction. It was also capable of growth with H-2 as the sole electron donor, CO2 as a carbon source and Fe(III) as an electron acceptor without the need for organic substances. Fe(III) [in the form of poorly crystalline Fe(III) oxide or Fe(III) citrate] was the only electron acceptor that supported growth. 16S rRNA gene sequence analysis revealed that the closest relative of the isolated organism was Geoglobus ahangari 234(T) (97.0 %). On the basis of its physiological properties and phylogenetic analyses, the isolate is considered to represent a novel species, for which the name Geoglobus acetivorans sp. nov. is proposed. The type strain is SBH6(T) (=DSM 21716(T) =VKM B-2522(T)).
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Slobodkina G. B., Kolganova T. V., Querellou Joel, Bonch-Osmolovskaya E. A., Slobodkin A. I. (2009). Geoglobus acetivorans sp nov., an iron(III)-reducing archaeon from a deep-sea hydrothermal vent. International journal of systematic and evolutionary microbiology, 59, 2880-2883. Publisher's official version : , Open Access version :