| Cross Index | Rhodospirillum |
| SuperSet | Prokaryote, Eubacteria Anoxygenic Phototrophic Bacteria |
| Compare | Purple Bacteria
Green Bacteria
Anaerobic chemotropic Erythrobacter longus, |
| Contrast | Oxygenic Phototrophic Bacteria Archaea |
| Subset |
| Morphology | Rhodospirillum |
| CELLULAR |
| Staining | Gram-negative |
| Morphology | Cells are spiral, 0.7-1.5 um wide |
| Motility | motile by means of polar flagella; |
| Specialized structures | ,Internal photosynthetic
membranes are present as vesicles or as lamellae lying
parallel to the cytoplasmic membrane or forming a sharp
angle to it. Polysaccharides, poly-B-hydro- xybutyric acid and polyphosphates may be present as storage product. |
| Division |
| COLONIAL |
| Solid surface |
| Liquid |
| Growth Parameters | Rhodospirillum |
| PHYSIOLOGICAL |
| Tropism | Growth occurs preferably photoheterotrophically under anaerobic conditions in the light but also occurs under microaerobic to aerobic conditions in the dark. |
| Oxygen | Some species are very
sensitive to oxygen; others grow equally well aerobically
in the dark and, under phototrophic conditions,
anaerobically in the light Molecular hydrogen may be used as a photosynthetic electron donor during photautotrophic growth |
| pH | |
| Temperature | |
| Requirements | |
| Products | Photosynthetic pigments are bacteriochlorophyll a (esterified with phytol or geranylgeraniol) and carotenoids of the spirilloxanthin series with spirilloxanthin itself lacking in some species. |
| Enzymes | |
| Unique features |
| ENVIRONMENTAL |
| Habitat | |
| Lifestyle | |
| Pathogenicity |
| Distribution |
| Genome | Rhodospirillum |
| G+C Mol % | 60.5-65.8 (Bd) and 62.1-63.5 (Tm). |
| Reference | Rhodospirillum |
| First citation | Molisch,H. 1907. Die Purpurbakterien nach neuren Untersuchungen. Gustav Fischer Verlag, Jena, pp 1-95 |
| The Prokaryotes | |
| Bergey's Systematatic | p 1662 H. G. Truper and J. F. Imhoff |
| Bergey's Determinative | p 359 |
| References |