RRC ID 3050
Author Vandieken V, Knoblauch C, Jørgensen BB.
Title Desulfovibrio frigidus sp. nov. and Desulfovibrio ferrireducens sp. nov., psychrotolerant bacteria isolated from Arctic fjord sediments (Svalbard) with the ability to reduce Fe(III).
Journal Int J Syst Evol Microbiol
Abstract Strains 18T, 61T and 77 were isolated from two permanently cold fjord sediments on the west coast of Svalbard. The three psychrotolerant strains, with temperature optima at 20-23 degrees C, were able to grow at the freezing point of sea water, -2 degrees C. The strains oxidized important fermentation products such as hydrogen, formate and lactate with sulfate as the electron acceptor. Sulfate could be replaced by sulfite, thiosulfate or elemental sulfur. Poorly crystalline and soluble Fe(III) compounds were reduced in sulfate-free medium, but no growth occurred under these conditions. In the absence of electron acceptors, fermentative growth was possible. The pH optimum for the strains was around 7.1. The DNA G+C contents were 43.3 and 42.0 mol% for strains 18T and 61T, respectively. Strains 18T, 61T and 77 were most closely related to Desulfovibrio hydrothermalis (95.0-95.7 % 16S rRNA gene sequence similarity). Strains 18T and 77, exhibiting 99.9 % sequence similarity, represent a novel species for which the name Desulfovibrio frigidus sp. nov. is proposed. The type strain is strain 18T (=DSM 17176T = JCM 12924T). Strain 61T was closely related to strains 18T and 77 (97.6 and 97.5 % 16S rRNA gene sequence similarity), but on the basis of DNA-DNA hybridization strain 61T represents a novel species for which the name Desulfovibrio ferrireducens sp. nov. is proposed. The type strain is strain 61T (=DSM 16995T = JCM 12925T).
Volume 56(Pt 4)
Pages 681-685
Published 2006-4-1
DOI 10.1099/ijs.0.64057-0
PMID 16585676
MeSH Arctic Regions Cold Temperature DNA, Bacterial / analysis DNA, Ribosomal / analysis Desulfovibrio / classification* Desulfovibrio / cytology Desulfovibrio / isolation & purification Desulfovibrio / physiology Ferric Compounds / metabolism* Genes, rRNA Geologic Sediments / microbiology* Molecular Sequence Data RNA, Ribosomal, 16S / analysis RNA, Ribosomal, 16S / genetics
IF 2.415
Times Cited 22
Pathogenic microorganisms JCM 12924? JCM 12925?