Phylogenetic diversity of phototrophic purple non-sulfur bacteria in the proteobacteria alpha group
Kawasaki, H.; Hoshino, Y.; Yamasato, K.
FEMS (Federation of European Microbiological Societies) Microbiology Letters 112(1): 61-66
The phylogenetic structure of non-sulfur purple bacteria in the Proteobacteria a group was elucidated by the comparative analysis of 16S rRNA sequences from 29 strains of phototrophs and 14 strains of related non-phototrophs. The sequences of 12 strains including 7 isolates were determined in this study. The phototrophs in the a group were found to be extremely diversified and intermingled with non-phototrophs. Rhodopseudomonas species were dispersed into 3 lines of descent and Rhodospirillum species were dispersed into 5 lines. Marine organisms were composed of 4 lineages which were independent of each other and of freshwater lineages. Rhodospirillum fulvum, Rhodospirillum molischianum and the genus Magnetospirillum were found to be monophyletic.