A rod-shaped, phototrophic, purple sulfur bacterium was isolated in pure culture from brackish water near Bheemli, Visakhapatnam, India, in a medium that contained 2 % NaCl (w/v). Strain JA144 was Gram-negative and motile. It did not require salt, but tolerated up to 3 % NaCl (w/v). Intracellular photosynthetic membranes were of the vesicular type. Bacteriochlorophyll and carotenoids that probably belonged to the rhodopinal series were present as photosynthetic pigments. Strain JA144 was able to grow photolithoautotrophically, photolithoheterotrophically and photoorganoheterotrophically. It did not require vitamins. Phylogenetic analysis on the basis of 16S rRNA gene sequences showed that strain JA144 clustered with species of the genus belonging to the class . Highest sequence similarities of strain JA144 were found with the type strains of (96.7 % similarity), (96.3 %), (95.6 %) and (89.2 %). Based on 16S rRNA gene sequence analysis and morphological and physiological characteristics, strain JA144 is sufficiently different from other species to represent a novel species, sp. nov.; the type strain is JA144 (=JCM 14796=DSM 19781).


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vol. , part 4, pp. 750 – 753

(a) Whole-cell absorption spectrum of strain JA144 and (b) acetone spectrum of extracted pigments.


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