1887

Abstract

The type strains of (LMG 22015) and (CECT 5294) were analysed by means of genomic DNA–DNA hybridization, comparison of 16S rRNA gene sequences and phenotypic properties determined under the same methodological conditions. LMG 22015 showed DNA–DNA relatedness levels of 72 % when hybridized with the genomic DNA of CECT 5294. Sequence comparisons revealed that the 16S rRNA genes of the two strains had a similarity of 99·8 %. The cellular fatty acid and polar lipid compositions of the two strains and their DNA mol% G+C contents were almost identical. Bacteriochlorophyll (Bchl ) and polyhydroxybutyrate were produced by both strains under the same culture conditions. Their closest phylogenetic neighbours were and ; however, the low sequence similarity values (95·7–95·9 %) and several important differences in phenotypic traits (ionic requirements, Bchl production and polar lipids) support the distinction between the genera and . Thus, we propose the unification of (LMG 22015) and (CECT 5294) as (type strain, CECT 5294=DSM 16310). An emended description of the genus is also presented.

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2005-09-01
2019-10-24
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