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Int J Syst Evol Microbiol 59 (2009), 2089-2093; DOI  10.1099/ijs.0.009019-0
© 2009 International Union of Microbiological Societies

Phaeospirillum chandramohanii sp. nov., a phototrophic alphaproteobacterium with carotenoid glycosides

P. Anil Kumar1, T. N. R. Srinivas1, S. Takaichi2, T. Maoka3, Ch. Sasikala1 and Ch. V. Ramana4

1 Bacterial Discovery Laboratory, Centre for Environment, Institute of Science and Technology, J. N. T. University, Kukatpally, Hyderabad 500 085, India
2 Nippon Medical School, Department of Biology, Kosugi-cho, Nakahara, Kawasaki 211-0063, Japan
3 Institute for Production Development, Shimogamo-morimoto-cho, Sakyo, Kyoto 606-0805, Japan
4 Department of Plant Sciences, School of Life Sciences, University of Hyderabad, PO Central University, Hyderabad 500 046, India

Correspondence
Ch. V. Ramana
r449{at}sify.com
or
sasi449{at}yahoo.ie

A Gram-negative, spiral-shaped, phototrophic, purple non-sulfur bacterial strain, designated JA145T, was isolated from a freshwater habitat. Cells of strain JA145T were motile by means of a monopolar flagellum. Intracellular photosynthetic membranes were of the stacked type. Bacteriochlorophyll a and the carotenoid lycopene and its glucosides were present as photosynthetic pigments. There was no vitamin requirement for strain JA145T. The predominant cellular fatty acids were C16 : 1{omega}7c/C16 : 1{omega}6c (22.24 %), C16 : 0 (22.97 %) and C18 : 1{omega}7c (43.24 %). Phylogenetic analysis based on 16S rRNA gene sequences showed that strain JA145T clustered with species of the genus Phaeospirillum, in the class Alphaproteobacteria. The highest sequence similarities of strain JA145T were found with the type strains of Phaeospirillum fulvum (96.12 %) and Phaeospirillum molischianum (96.19 %). Based on the 16S rRNA gene sequence analysis and the morphological and physiological characteristics, strain JA145T is considered to represent a novel species, for which the name Phaeospirillum chandramohanii sp. nov. is proposed. The type strain is JA145T (=JCM 14933T=KCTC 5703T=NBRC 104961T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain JA145T is AM779061.

A phase-contrast micrograph of cells and whole-cell absorption and acetone spectra of strain JA145T and a table giving the 1H NMR spectral data for hydroxylycopene β-D-glucoside in CDCl3 are available as supplementary material with the online version of this paper.






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