Psychromonas ingrahamii sp. nov., a novel gas vacuolate, psychrophilic bacterium isolated from Arctic polar sea ice
DNA, Bacterial
0301 basic medicine
Base Composition
0303 health sciences
Arctic Regions
Polymers
Fatty Acids
Molecular Sequence Data
Nucleic Acid Hybridization
Genes, rRNA
Sequence Analysis, DNA
DNA, Ribosomal
6. Clean water
Bacterial Typing Techniques
RNA, Bacterial
03 medical and health sciences
Microscopy, Electron, Transmission
RNA, Ribosomal, 16S
Environmental Microbiology
Ice Cover
Microscopy, Phase-Contrast
Alaska
Gammaproteobacteria
Phylogeny
DOI:
10.1099/ijs.0.64068-0
Publication Date:
2006-04-20T18:36:00Z
AUTHORS (5)
ABSTRACT
A gas vacuolate bacterium, designated strain 37T, was isolated from a sea ice core collected from Point Barrow, Alaska, USA. Cells of strain 37Twere 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 : 1ω7ccomprised 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 genusPsychromonas, with highest sequence similarity (96.8 %) toPsychromonas antarctica. Phenotypic analysis differentiated strain 37TfromP. antarcticaon 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 37TandP. antarctica, providing further support that it represents a distinct species. The namePsychromonas ingrahamiisp. nov. is proposed for this novel species. The type strain is 37T(=CCUG 51855T=CIP 108865T).
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CITATIONS (92)
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