Flavobacterium chryseum sp. nov. and Flavobacterium psychroterrae sp. nov., novel environmental bacteria isolated from Antarctica
Language English Country England, Great Britain Media print-electronic
Document type Journal Article
- Keywords
- Antarctica, Flavobacterium chryseum sp. nov., Flavobacterium psychroterrae sp.nov., phylogeny, taxonomy,
- MeSH
- DNA, Bacterial genetics MeSH
- Flavobacterium classification genetics isolation & purification MeSH
- Phosphatidylethanolamines chemistry MeSH
- Phylogeny * MeSH
- Nucleic Acid Hybridization MeSH
- Fatty Acids chemistry MeSH
- Pigmentation MeSH
- Soil Microbiology * MeSH
- RNA, Ribosomal, 16S genetics MeSH
- Sequence Analysis, DNA MeSH
- Spermidine analogs & derivatives chemistry MeSH
- Bacterial Typing Techniques MeSH
- Vitamin K 2 analogs & derivatives chemistry MeSH
- Base Composition MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Antarctic Regions MeSH
- Names of Substances
- DNA, Bacterial MeSH
- Phosphatidylethanolamines MeSH
- Fatty Acids MeSH
- menaquinone 6 MeSH Browser
- phosphatidylethanolamine MeSH Browser
- RNA, Ribosomal, 16S MeSH
- Spermidine MeSH
- sym-homospermidine MeSH Browser
- Vitamin K 2 MeSH
A group of rod-shaped, aerobic, Gram-stain-negative, gliding bacteria producing flexirubin-type pigment was isolated from environmental samples collected in Antarctica in 2009-2014. Phylogenetic analysis of the almost complete 16S rRNA gene sequences revealed two separated branches belonging to the genus Flavobacterium. Group I (n=8), represented by strain CCM 8826T, shared the highest sequence similarity to Flavobacterium collinsii 983-08T (98.8 %) and Flavobacterium saccharophilum DSM 1811T (98.4 %), and group II (n=4) represented by strain CCM 8827T shared the highest similarity to Flavobacterium aquidurense WB 1.1-56T (99.6 %). High genetic homogeneity of both groups, separation from each other and from phylogenetically close Flavobacterium species was verified by the rep-PCR fingerprinting method. DNA-DNA hybridization confirmed low genomic relatedness between strain CCM 8826T and F. collinsii 983-08T and F. saccharophilum DSM 1811T (18 and 28 %, respectively) and between strain CCM 8827T and F. aquidurense WB 1.1-56T (27 %). Chemotaxonomic analyses of strains CCM 8826T and CCM 8827T revealed the respiratory quinone to be MK-6, the major identified polar lipid was phosphatidylethanolamine and the predominant polyamine was sym-homospermidine. The common major fatty acids were C15 : 0 iso, C17 : 0 iso 3OH, C15 : 1 iso G, Summed Feature 3 (C16 : 1ω7c/C16 : 1ω6c), C15 : 0 iso 3OH and additionally, C15 : 0 anteiso among group II members. All analyses confirmed that strains of group I and II represent two novel species of the genus Flavobacterium, for which the names Flavobacterium chryseum sp. nov. (type strain CCM 8826T=P3160T=LMG 30615T) and Flavobacterium psychroterrae sp. nov. (type strain CCM 8827T=P3922T=LMG 30616T) are proposed.
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