Desulfurobacterium indicum sp nov., a thermophilic sulfur-reducing bacterium from the Indian Ocean

Type Article
Date 2017-06
Language English
Author(s) Cao Junwei1, 2, 3, 4, 5, 6, 7, 8, 9, Birien Tiphaine2, 3, 4, Gayet Nicolas3, 10, Huang Zhaobin5, 6, 7, 8, 9, Shao Zongze5, 6, 7, 8, 9, Jebbar MohamedORCID2, 3, 4, Alain Karine2, 3, 4
Affiliation(s) 1 : Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China.
2 : UBO, IUEM, UMR 6197, Lab Microbiol Environm Extremes LM2E,UEB, Rue Dumont Urville, F-29280 Plouzane, France.
3 : CNRS, IUEM, UMR 6197, Lab Microbiol Environm Extremes LM2E, Rue Dumont Urville, F-29280 Plouzane, France.
4 : IFREMER, UMR 6197, Lab Microbiol Environm Extremes LM2E, Technopole Pointe Diable, F-29280 Plouzane, France.
5 : State Key Lab Breeding Base Marine Genet Resource, Xiamen 361005, Peoples R China.
6 : Key Lab Marine Genet Resources, Xiamen 361005, Peoples R China.
7 : Third Inst State Ocean Adm, Xiamen 361005, Peoples R China.
8 : Collaborat Innovat Ctr Marine Biol Resources, Xiamen 361005, Peoples R China.
9 : Key Lab Marine Genet Resources Fujian Prov, Xiamen 361005, Peoples R China.
10 : IFREMER, Ctr Brest, REM EEP LEP, Inst Carnot Ifremer EDROME, F-29280 Plouzane, France.
Source International Journal Of Systematic And Evolutionary Microbiology (1466-5026) (Microbiology Soc), 2017-06 , Vol. 67 , N. 6 , P. 1665-1668
DOI 10.1099/ijsem.0.001837
WOS© Times Cited 3
Keyword(s) Desulfurobacterium, thermophilic, hydrothermal vent, chemolithoautotroph, sulfur-reducer
Abstract

A novel sulfur-reducing bacterium, strain K6013(T), was isolated from a sulfide sample collected at a depth of 2771 m from a high-temperature hydrothermal vent in the Indian Ocean. Cells were Gram-stain-negative, anaerobic, motile rods (0.92.2 x 0.4-0.6 mu m). The strain grew at NaCl concentrations ranging from 1 to 4.5% (w/v) (optimum 2.5 %), at pH 5 to 8 (optimum pH 6), and at temperatures between 40 and 75 degrees C (optimum 65 degrees C). K6013(T) was an obligate chemolithoautotroph, using thiosulfate, sulfur and nitrate as terminal electron acceptors in the presence of H-2 but not sulfate, sulfite nor nitrite. The major cellular fatty acids were C-16 : 0 (17.4 %), C-18 : 1 omega 7c/C-18 : 1 omega 6c (ummed feature 8, 37.91 %), C-18 : 0 (18.29 %) and C-14 : 0 3-OH/iso-C-16: I-1 (summed feature 2, 8.56 %). The DNA G+C content was 38.2 mol%. The results of phylogenetic 16S rRNA gene sequence analyses indicated that K6013(T) represents a member of the genus Desulfurobacterium within the class Aquificae, with highest sequence similarity of 96.93% to Desulfurobacterium atlanticum SL22(T). On the basis of genotypic and phenotypic data, K6013(T) is considered to represent a novel species of the genus Desulfurobacterium, for which the name Desulfurobacterium indicum sp. nov. is proposed, with the type strain K6013(T) (=DSM 101677(T)=MCCC 1A01868(T)).

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Cao Junwei, Birien Tiphaine, Gayet Nicolas, Huang Zhaobin, Shao Zongze, Jebbar Mohamed, Alain Karine (2017). Desulfurobacterium indicum sp nov., a thermophilic sulfur-reducing bacterium from the Indian Ocean. International Journal Of Systematic And Evolutionary Microbiology, 67(6), 1665-1668. Publisher's official version : https://doi.org/10.1099/ijsem.0.001837 , Open Access version : https://archimer.ifremer.fr/doc/00395/50637/