Rhodobium gokarnense sp. nov., a novel phototrophic alphaproteobacterium from a saltern

Srinivas, T. N. R., Anil Kumar, P, Sasikala, Ch., Ramana, Ch.V. and Imhoff, Johannes F. (2007) Rhodobium gokarnense sp. nov., a novel phototrophic alphaproteobacterium from a saltern International Journal of Systematic and Evolutionary Microbiology, 57 . pp. 932-935. DOI 10.1099/ijs.0.64843-0.

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Abstract

A pink-pigmented, phototrophic, purple nonsulfur bacterium, strain JA173T, was isolated in pure culture from a saltern in Gokarna, India, in a medium containing 2 % (w/v) NaCl. Strain JA173T was a non-motile Gram-negative rod that multiplied by budding. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain JA173T clusters with the class Alphaproteobacteria; highest sequence similarity (98 %) was to the type strain of Rhodobium orientis and 94 % similarity was observed to the 16S rRNA gene sequence of the type strain of Rhodobium marinum. However, DNA–DNA hybridization with R. orientis DSM 11290T revealed a relatedness value of only 35.1 % with strain JA173T. Strain JA173T contained lamellar internal membranes, bacteriochlorophyll a and carotenoids of the spirilloxanthin series. Strain JA173T had an obligate requirement for NaCl (optimum growth at 2–6 %, w/v) and grew photoheterotrophically with a number of organic compounds as carbon source or electron donor. Photoautotrophic, chemoautotrophic and fermentative growth could not be demonstrated. Yeast extract was required for growth. Based on 16S rRNA gene sequence analysis, DNA–DNA hybridization data and morphological and physiological characteristics, strain JA173T is sufficiently different from other species of the genus Rhodobium to be recognized as a representative of a novel species, Rhodobium gokarnense sp. nov. The type strain is JA173T (=ATCC BAA-1215T=DSM 17935T=JCM 13532T).

Document Type: Article
Keywords: Microbiology; bacteria; Rhodobium gokarnense sp. nov.
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-MI Marine Microbiology
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1099/ijs.0.64843-0
ISSN: 1466-5026
Projects: Future Ocean
Date Deposited: 03 Dec 2008 16:51
Last Modified: 24 May 2017 13:09
URI: http://eprints.uni-kiel.de/id/eprint/3559

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