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Rhodospirillum centenum,sp. nov., a thermotolerant cyst-forming anoxygenic photosynthetic bacterium
Authors:Jeffrey Favinger  Rebecca Stadtwald  Howard Gest
Institution:(1) Photosynthetic Bacteria Group, Department of Biology, Indiana University, 47405 Bloomington, IN, USA
Abstract:A novel non-sulfur purple photosynthetic bacterium, designated Rhodospirillum centenum, was isolated from an enrichment culture designed to favor growth of anoxygenic photosynthetic N2-fixing bacteria. R. centenum grows optimally at 40–42° C and has the capacity to produce cytoplasmic lsquoR bodiesrsquo, refractile structures not observed hitherto in photosynthetic prokaryotes. The bacterium is also unusual among photosynthetic bacteria in that it forms desiccation-resistant cysts when grown aerobically in darkness with butyrate as the sole carbon source.
Keywords:cysts  N2 fixation  photosynthetic bacteria  R bodies  Rhodospirillum
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