1887

Abstract

Two strains of a novel aerobic, bacteriochlorophyll -containing species of the α-4 subclass of the were isolated from the hot spring at Alcafache in central Portugal. 16S rRNA gene sequence-based phylogenetic analyses showed the two novel isolates to be phylogenetically related to members of the genera , and . The strains produce reddish-orange-pigmented colonies, have an optimum growth temperature of about 50 °C and could be distinguished from the species , which also has a high growth temperature, primarily on the basis of the fatty acid composition. The novel species does not grow anaerobically in the presence or absence of a light source. The strains of the novel species utilize several single carbon sources for growth, most of which are also used by . The species status of strains ALC-2 and ALC-3 was confirmed by low reassociation values of the DNA with species of the genera , and . Phenotypic characteristics and 16S rRNA gene sequence analyses also show that strains ALC-2 (=DSM 12079 =ATCC BAA-386) and ALC-3 (=DSM 12080) represent a novel species, for which the name sp. nov. is proposed.

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2003-01-01
2024-04-19
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