title: Desulfovibrio psychrotolerans sp. nov., a psychrotolerant and moderately alkaliphilic sulfate-reducing deltaproteobacterium from the Himalayas.
abstract: A novel sulfate-reducing bacterium (strain JS1T) was isolated from lake Pangong, a salt-water lake situated in the Himalayas of Leh District, Jammu and Kashmir, India. Cells of strain JS1T are Gram-negative, vibriod, motile by means of single polar flagellum, contain desulfoviridin, are catalase-positive and can hydrolyse starch. Strain JS1T grew optimally at pH 8.5-9.0 and at temperatures ranging from 10 to 50 degrees C (optimum 28-30 degrees C). Chemo-organoheterotrophy was the only growth mode of strain JS1T and was possible on a wide range of organic compounds. Sulfate alone but not sulfite, thiosulfate, elemental sulfur, nitrite or nitrate was used as electron acceptor. It has no requirement for NaCl but can tolerate up to 2 % NaCl (w/v). p-Aminobenzoate is a required growth factor. The 16S rRNA gene sequence of the bacterium demonstrated similarity between strain JS1T and the members of the genus Desulfovibrio. The position of strain JS1T within the phylogenetic tree indicated that it clustered closely with Desulfovibrio acrylicus DSM 10141(T) (89.85 % sequence similarity). On the basis of phenotypic and molecular genetic evidence, it is proposed that strain JS1T be classified as a novel species of the genus Desulfovibrio of the family Desulfovibrionaceae, with the species name Desulfovibrio psychrotolerans sp. nov. The type strain of the species is JS1T (=JCM 14597T=KCTC 5573T=DSM 19430T).
authors.affiliation: Bacterial Discovery Laboratory, Centre for Environment, Institute of Science and Technology, JNT University, Kukatpally, Hyderabad 500 085, India. sasi449@yahoo.ie
authors.forename: T S
authors.initials: TS
authors.lastname: Sasi Jyothsna
authors.forename: Ch
authors.initials: Ch
authors.lastname: Sasikala
authors.forename: Ch V
authors.initials: ChV
authors.lastname: Ramana
mesh_terms: D001482:Base Composition; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D003901:Desulfovibrio / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism*; D005618:Fresh Water / Q000382:microbiology; D005798:Genes, Bacterial; D007194:India; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D010641:Phenotype; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012965:Sodium Chloride / Q000378:metabolism; D013045:Species Specificity; D013431:Sulfates / Q000378:metabolism; D009626:Terminology as Topic
chemical_list: D004269:DNA, Bacterial; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D013431:Sulfates; D012965:Sodium Chloride