Habitat distribution of the genus Belliella in continental waters and the description of Belliella alkalica sp. nov., Belliella calami sp. nov. and Belliella filtrata sp. nov.

Sammanfattning

The genus Belliella belongs to the family Cyclobacteriaceae (order Cytophagales, phylum Bacteroidota) and harbours aerobic chemoheterotrophic bacteria. Members of this genus were isolated from various aquatic habitats, and our analysis based on global amplicon sequencing data revealed that their relative abundance can reach up to 5-10 % of the bacterioplankton in soda lakes and pans. Although a remarkable fraction of the most frequent genotypes that we identified from continental aquatic habitats is still uncultured, five new alkaliphilic Belliella strains were characterized in detail in this study, which were isolated from three different soda lakes and pans of the Carpathian Basin (Hungary). Cells of all strains were Gram- stain-negative, obligate aerobic, rod-shaped, non-motile and non- spore-forming. The isolates were oxidase-and catalase-positive, red-coloured, but did not contain flexirubin- type pigments; they formed bright red colonies that were circular, smooth and convex. Their major isoprenoid quinone was MK -7 and the predominant fatty acids were iso-C-15:0, iso-C-17:0 3 -OH and summed feature 3 containing C-16:1 omega 6c and/or C-16:1 omega 7c. The polar lipid profiles contained phosphatidylethanolamine, an unidentified aminophospholipid, an unidentified glycolipid, and several unidentified lipids and aminolipids. Based on whole-genome sequences, the DNA G+C content was 37.0, 37.1 and 37.8 mol % for strains R4 -6(T), DMA-N-10a(T) and U6F3(T), respectively. The distinction of three new species was confirmed by in silico genomic comparison. Orthologous average nucleotide identity (

Nyckelord

alkaline habitat; Bacteroidota; bacterioplankton; new species; saline environment; soda lake

Publicerad i

International Journal of Systematic and Evolutionary Microbiology
2023, volym: 73, artikelnummer: 005928
Utgivare: MICROBIOLOGY SOC

SLU författare

• Szabò, Attila

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    
  • Ökológiai Kutatóközpont

UKÄ forskningsämne

Mikrobiologi

Publikationens identifierare

• DOI: https://doi.org/10.1099/ijsem.0.005928

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/126815