0557084 - MBÚ 2023 RIV CH eng J - Journal Article
Sedláček, I. - Holochová, P. - Busse, H. - Koublová, V. - Králová, S. - Švec, P. - Sobotka, Roman - Staňková, E. - Pilný, Jan - Šedo, O. - Smolíková, J. - Sedlář, K.
Characterisation of Waterborne Psychrophilic Massilia Isolates with Violacein Production and Description of Massilia antarctica sp. nov.
Microorganisms. Roč. 10, č. 4 (2022), č. článku 704. ISSN 2076-2607. E-ISSN 2076-2607
Research Infrastructure: CIISB II - 90127; CzechPolar2 - 90078
Institutional support: RVO:61388971
Keywords : emended description * lipid-composition * bacteria * genome * database * soil * gene * classification * degradation * restriction * Massilia * violacein * psychrophilic * description * whole-genome sequencing * Antarctica
OECD category: Microbiology
Impact factor: 4.5, year: 2022 ; AIS: 0.826, rok: 2022
Method of publishing: Open access
Result website:
https://www.mdpi.com/2076-2607/10/4/704DOI: https://doi.org/10.3390/microorganisms10040704

A group of seven bacterial strains producing blue-purple pigmented colonies on R2A agar was isolated from freshwater samples collected in a deglaciated part of James Ross Island and Eagle Island, Antarctica, from 2017-2019. The isolates were psychrophilic, oligotrophic, resistant to chloramphenicol, and exhibited strong hydrolytic activities. To clarify the taxonomic position of these isolates, a polyphasic taxonomic approach was applied based on sequencing of the 16S rRNA, gyrB and lepA genes, whole-genome sequencing, rep-PCR, MALDI-TOF MS, chemotaxonomy analyses and biotyping. Phylogenetic analysis of the 16S rRNA gene sequences revealed that the entire group are representatives of the genus Massilia. The closest relatives of the reference strain P8398(T) were Massilia atriviolacea, Massilia violaceinigra, Massilia rubra, Massilia mucilaginosa, Massilia aquatica, Massilia frigida, Massilia glaciei and Massilia eurypsychrophila with a pairwise similarity of 98.6-100% in the 16S rRNA. The subsequent gyrB and lepA sequencing results showed the novelty of the analysed group, and the average nucleotide identity and digital DNA-DNA hybridisation values clearly proved that P8398(T) represents a distinct Massilia species. After all these results, we nominate a new species with the proposed name Massilia antarctica sp. nov. The type strain is P8398(T) (= CCM 8941(T) = LMG 32108(T)).
Permanent Link: http://hdl.handle.net/11104/0331255