Thermodesulfovibrio hydrogeniphilus sp. nov., a new thermophilic sulphate-reducing bacterium isolated from a Tunisian hot spring.

Olfa Haouari (1) , Marie Laure Fardeau (1) , Jean Luc Cayol (1) , Guy Fauque (1) , Corinne Casiot (2) , Francoise Elbaz-Poulichet (2) , Moktar Hamdi (3) , Bernard Ollivier (1)

1 Laboratoire de Microbiologie et Biotechnologie des Environnements Chauds
2 HSM - Hydrosciences Montpellier
3 INSAT - Institut National des Sciences Appliquées et de Technologie [Tunis]

A new thermophilic sulphate-reducing bacterium (strain Hbr5T) was enriched and isolated from a terrestrial Tunisian hot spring. It was a non-spore-forming Gram-negative curved or vibrio-shaped bacterium. It appeared singly or in long chains and was actively motile by a polar flagellum. It possessed c-type cytochromes and desulfofuscidin. Growth occurred between 50 and 70 degrees C, with an optimum of 65 degrees C at pH 7.1. In the presence of sulphate as a terminal electron acceptor, this strain readily used H2 but formate only poorly. It could use sulphate, thiosulphate, sulphite or arsenate as electron acceptors. Its DNA G+C content was 36.1 mol%. Based on phenotypic, genomic, and phylogenetic characteristics, strain Hbr5T (=DSM 18151T, =JCM 13991T) is proposed to be assigned to a novel species of genus Thermodesulfovibrio, T. hydrogeniphilus sp. nov.

Domaines: Systématique, phylogénie et taxonomie

Olfa Haouari, Marie Laure Fardeau, Jean Luc Cayol, Guy Fauque, Corinne Casiot, et al.. Thermodesulfovibrio hydrogeniphilus sp. nov., a new thermophilic sulphate-reducing bacterium isolated from a Tunisian hot spring.. Systematic and Applied Microbiology, 2008, 31 (1), pp.38-42. ⟨10.1016/j.syapm.2007.12.002⟩. ⟨hal-00752866⟩