Genomic and functional insights of a mucin foraging Rhodopirellula halodulae sp. nov.

Nine novel strains were obtained from various algal and seagrass samples. The analysis of the 16S rRNA gene-based phylogenetic tree revealed monophyletic placement of all novel strains within the Rhodopirellula genus. The type strain was identified as JC737, which shared 99.

Phylogenomic analysis of the genus : proposal for division of this genus into the emended genus and two novel genera gen. nov. and gen. nov.

The members of the genus are key players in the removal of petroleum hydrocarbons from polluted marine environments. More than half of the species were described in the last decade using 16S rRNA gene phylogeny and genomic-based metrics. However, the 16S rRNA gene identity (<94 %) between some members of the genus suggested their imprecise taxonomic status.

Revisiting the taxonomy of the genus Rhodopirellula with the proposal for reclassification of the genus to Rhodopirellula sensu stricto, Aporhodopirellula gen. nov., Allorhodopirellula gen. nov. and Neorhodopirellula gen. nov.

The current genus Rhodopirellula consists of marine bacteria which belong to the family Pirellulaceae of the phylum Planctomycetota. Members of the genus Rhodopirellula are aerobic, mesophiles and chemoheterotrophs. The here conducted analysis built on 16S rRNA gene sequence and multi-locus sequence analysis based phylogenomic trees suggested that the genus is subdivided into four clades.

Arenibacter lacus sp. nov., Isolated from Chilika Lagoon, India.

A shiny dark yellow pigmented, Gram-stain-negative, rod-shaped, non-motile bacterium, designated as strain JC631, was isolated from the sediment ecosystem of Chilika lagoon, India. Strain JC631 tolerates up to pH 10 and NaCl up to 3% (w/v). MK6 is the only respiratory quinone.

Rhodobacter alkalitolerans sp. nov., isolated from an alkaline brown pond.

An alkali-tolerant, Gram-stain-negative, motile, rod-to-oval-shaped, yellowish brown-colored, phototrophic bacterium, designated as strain JA916, was isolated from an alkaline brown pond in Gujarat, India. The DNA G + C content of the strain JA916 was 65.1 mol%.