A novel ovoid, phototrophic, purple non-sulfur bacterium was isolated in pure culture from a sample of sediment from an industrially polluted pond (Noor Mohammad Kunta) in Hyderabad, India. Strain JA234 was found to be Gram-negative and non-motile and grew photoheterotrophically with a number of organic compounds serving as carbon source/electron donor. Photo-organoheterotrophic and chemo-organoheterotrophic growth were demonstrated. Biotin and thiamine were required for growth of strain JA234. Phylogenetic analysis on the basis of 16S rRNA gene sequences showed that strain JA234 is most closely related to (97.3 % sequence similarity) and clusters with other species of the genus of the family . However, DNA–DNA hybridization with JCM 9340 showed a relatedness of only 31.3 % with respect to strain JA234. On the basis of 16S rRNA gene sequence analysis, DNA–DNA hybridization data and morphological and physiological characteristics, strain JA234 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is JA234 (=JCM 14779=CCUG 55049).


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vol. , part 6, pp. 1379 - 1383

Electron microphotograph of an ultrathin section of a cell of strain JA234 showing the vesicular nature of the photosynthetic membranes. [PDF](51 KB)


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