Description of Massilia rubra sp. nov., Massilia aquatica sp. nov., Massilia mucilaginosa sp. nov., Massilia frigida sp. nov., and one Massilia genomospecies isolated from Antarctic streams, lakes and regoliths
Language English Country Germany Media print-electronic
Document type Journal Article
PubMed
32847787
DOI
10.1016/j.syapm.2020.126112
PII: S0723-2020(20)30067-9
Knihovny.cz E-resources
- Keywords
- Antarctica, Massilia, Oxalobacteraceae, Polyphasic taxonomy, Psychrophilic bacteria, Whole-genome sequence,
- MeSH
- Genes, Bacterial MeSH
- DNA, Bacterial genetics MeSH
- Phenotype MeSH
- Phylogeny MeSH
- Genome, Bacterial MeSH
- Genes, rRNA MeSH
- Geologic Sediments microbiology MeSH
- Lakes microbiology MeSH
- Oxalobacteraceae classification genetics isolation & purification physiology MeSH
- Rivers microbiology MeSH
- RNA, Ribosomal, 16S genetics MeSH
- Sequence Analysis, DNA MeSH
- Bacterial Typing Techniques MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Antarctic Regions MeSH
- Names of Substances
- DNA, Bacterial MeSH
- RNA, Ribosomal, 16S MeSH
Bacteria of the genus Massilia often colonize extreme ecosystems, however, a detailed study of the massilias from the Antarctic environment has not yet been performed. Here, sixty-four Gram-stain-negative, aerobic, motile rods isolated from different environmental samples on James Ross Island (Antarctica) were subjected to a polyphasic taxonomic study. The psychrophilic isolates exhibited slowly growing, moderately slimy colonies revealing bold pink-red pigmentation on R2A agar. The set of strains exhibited the highest 16S rRNA gene sequence similarities (99.5-99.9%) to Massilia violaceinigra B2T and Massilia atriviolacea SODT and formed several phylogenetic groups based on the analysis of gyrB and lepA genes. Phenotypic characteristics allowed four of them to be distinguished from each other and from their closest relatives. Compared to the nearest phylogenetic neighbours the set of six genome-sequenced representatives exhibited considerable phylogenetic distance at the whole-genome level. Bioinformatic analysis of the genomic sequences revealed a high number of putative genes involved in oxidative stress response, heavy-metal resistance, bacteriocin production, the presence of putative genes involved in nitrogen metabolism and auxin biosynthesis. The identification of putative genes encoding aromatic dioxygenases suggests the biotechnology potential of the strains. Based on these results four novel species and one genomospecies of the genus Massilia are described and named Massilia rubra sp. nov. (P3094T=CCM 8692T=LMG 31213T), Massilia aquatica sp. nov. (P3165T=CCM 8693T=LMG 31211T), Massilia mucilaginosa sp. nov. (P5902T=CCM 8733T=LMG 31210T), and Massilia frigida sp. nov. (P5534T=CCM 8695T=LMG 31212T).
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