Arthrobacter gangotriensis sp. nov. and Arthrobacter kerguelensis sp. nov. from Antarctica

• Main Authors: Gupta, P., Reddy, G. S. N., Delille, D., Shivaji, S.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Society for General Microbiology 2004
• Subjects: QL Zoology; Dakshin Gangotri; Indian; Kerguelen; Kerguelen Island; Antarc*; Antarctica
• Online Access: http://repository.ias.ac.in/64287/; http://ijs.sgmjournals.org/content/54/6/2375.abstract?sid=c0a34976-4052-4bbd-b7d2-1d872ed089cd

Two coryneform bacteria were isolated from a penguin rookery soil sample collected in Antarctica, near the Indian station Dakshin Gangotri (strain Lz1y T ), and from sea water from Kerguelen island, Antarctica (strain KGN15 T ). They have morphological and chemotaxonomic properties (peptidoglycan A4α type; major menaquinones MK-8, MK-9 and MK-10; predominant fatty acids anteiso-C 15:0 and anteiso-C 17:0 ) that are characteristic of members of the genus Arthrobacter. The isolates shared 97·8% 16S rRNA gene sequence similarity to each other and were most closely related to Arthrobacter sulfureus (about 98·5% sequence similarity). DNA-DNA hybridization experiments revealed 50% relatedness between the isolates, while the levels of DNA-DNA relatedness between strains Lz1y T and KGN15 T and their phylogenetic relative, A. sulfureus, were respectively 54 and 12%. Based on the above data and distinct phenotypic differences between the isolates and A. sulfureus, two novel species are proposed, Arthrobacter gangotriensis sp. nov. (type strain Lz1y T =DSM 15796T=JCM 12166 T ) and Arthrobacter kerguelensis sp. nov. (type strain KGN15 T =DSM 15797T=JCM 12165 T ).