Paenibacillus antarcticus sp. nov., a novel psychrotolerant organism from the Antarctic environment

International Journal of Systematic and Evolutionary Microbiology - Tập 54 Số 5 - Trang 1521-1526 - 2004
Ma Jesús Montes1, Elena Mercadé1, Núria Bozal-de Febrer1, J. Guinea1
1Laboratori de Microbiologia, Facultat de Farmacia, Universitat de Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain

Tóm tắt

An endospore-forming strain, 20CMT, was isolated from Antarctic sediment and identified as a member of the genus Paenibacillus on the basis of phenotypic and phylogenetic analyses. The organism stained Gram-variable and was facultatively anaerobic. Strain 20CMT was psychrotolerant, growing optimally at 10–15 °C. Like other Paenibacillus species, it contained anteiso-C15 : 0 as the major cellular fatty acid. The DNA G+C content was 40·7 mol%. 16S rRNA gene sequence analysis placed strain 20CMT within the Paenibacillus cluster, with a similarity value of 99·5 % to Paenibacillus macquariensis DSM 2T. DNA–DNA hybridization experiments between the Antarctic isolate and P. macquariensis DSM 2T revealed a reassociation value of 47 %, indicating that strain 20CMT and P. macquariensis DSM 2T belong to different species. Based on evaluation of morphological, physiological, chemotaxonomic and phylogenetic analyses, a novel species, Paenibacillus antarcticus sp. nov., is proposed; the type strain is 20CMT (=LMG 22078T=CECT 5836T).

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International Journal of Systematic and Evolutionary Microbiology

Tập 54 Số 5

1521-1526

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