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Volume 56, Issue 5

sp. nov., a novel gas vacuolate, psychrophilic bacterium isolated from Arctic polar sea ice Free

Abstract

A gas vacuolate bacterium, designated strain 37, was isolated from a sea ice core collected from Point Barrow, Alaska, USA. Cells of strain 37 were large (6–14 μm in length), rod-shaped, contained gas vacuoles of two distinct morphologies, and grew well at NaCl concentrations of 1–10 % and at temperatures of −12 to 10 °C. The DNA G+C content was 40 mol%. Whole-cell fatty acid analysis showed that 16 : 17 comprised 67 % of the total fatty acid content. Phylogenetic analysis of 16S rRNA gene sequences indicated that this bacterium was closely related to members of the genus , with highest sequence similarity (96.8 %) to . Phenotypic analysis differentiated strain 37 from on the basis of several characteristics, including cell morphology, growth temperature range and the ability to hydrolyse polymers. DNA–DNA hybridization experiments revealed a level of relatedness of 37 % between strain 37 and , providing further support that it represents a distinct species. The name sp. nov. is proposed for this novel species. The type strain is 37 (=CCUG 51855=CIP 108865).

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Keyword(s): PUFA, polyunsaturated fatty acid and SIMCO, sea ice microbial community
SGM
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2006-05-01
2024-04-20
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Psychromonas ingrahamii sp. nov., a novel gas vacuolate, psychrophilic bacterium isolated from Arctic polar sea ice
Int J Syst Evol Microbiol 56, 1001 (2006); https://doi.org/10.1099/ijs.0.64068-0
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