Exiguobacterium indicum sp. nov., a psychrophilic bacterium from the Hamta glacier of the Himalayan mountain ranges of India

• Main Authors: Chaturvedi, Preeti, Shivaji, S.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Society for General Microbiology 2006
• Subjects: QL Zoology; Antarc*
• Online Access: http://repository.ias.ac.in/64273/; http://ijs.sgmjournals.org/content/56/12/2765.abstract?sid=8c17bd8e-6bcc-4cc9-a376-efc38fd2940b

Strain HHS 31 T , a Gram-positive, motile, rod-shaped, non-spore-forming, alkaliphilic bacterium, was isolated from the melt water of a glacier. Phenotypic and chemotaxonomic characteristics indicate that strain HHS 31 T is related to species of the genus Exiguobacterium. The 16S rRNA gene sequence similarities between HHS 31 T and strains of known species confirm that it is closely related to members of the genus Exiguobacterium (93-99%) and that it exhibits >97% similarity with Exiguobacterium acetylicum DSM 20416 T (98.9%), Exiguobacterium antarcticum DSM 14480 T (98.0%), Exiguobacterium oxidotolerans JCM 12280 T (97.9%) and Exiguobacterium undae DSM 14481 T (97.4%). Phylogenetic analysis based on the 16S rRNA gene sequence further confirms the affiliation of HHS 31T with the genus Exiguobacterium. However, the levels of DNA-DNA relatedness between HHS 31 T and E. oxidotolerans JCM 12280T, E. acetylicum DSM 20416 T , E. undae DSM 14481 T and E. antarcticum DSM 14480 T are 50, 63, 67 and 28%, respectively. Strain HHS 31 T also differs from these four closely related species in terms of a number of phenotypic traits. The phenotypic, chemotaxonomic and phylogenetic data suggest that HHS 31 T merits the status of a novel species, for which the name Exiguobacterium indicum sp. nov. is proposed. The type strain is HHS 31 T (=LMG 23471 T =IAM 15368 T ).