Query: NC_009445:6424000 Bradyrhizobium sp. ORS 278 chromosome, complete genome Lineage: Bradyrhizobium; Bradyrhizobium; Bradyrhizobiaceae; Rhizobiales; Proteobacteria; Bacteria General Information: This strain was isolated from an Aeschynomene stem nodule and is photosynthetic, which is a rare trait in Rhizobium bacteria. These strains exhibit a photoheterotrophic and strictly aerobic photosynthesis. In culture, most stem isolates show the same pink coloration, while a few strains produce orange pigmentation. Pigment analyses showed that bacteriochlorophyll and spirilloxanthin, two pigments of the light harvesting system, are common to all of these photosynthetic Bradyrhizobium strains, whereas orange strains produce an additional bicyclic carotenoid, canthaxanthin (4,4'-diketo-beta-carotene). Bradyrhizobium sp. strain ORS278 produces the highest quantity of canthaxanthin of all tested photosynthetic bacteria; canthaxanthin represents 85% of its total carotenoid content.
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General Information: Four different strains were isolated from 2 sites, one pristine and one polluted. Environmental bacterium with potential use in bioremediation. This organism has a diverse metabolism and is capable of growth using light, inorganic, or organic compounds as energy sources and carbon dioxide or organic compounds as carbon sources. Commonly found in soil and water environments this bacterium is also capable of degrading a wide range of toxic organic compounds, and may be of use in bioremediation of polluted sites. The bacterium undergoes differentiation to produce a stalked nonmotile cell and a motile flagellated cell. In the presence of light, this bacterium produces a number of intracellular membranous vesicles to house the photosynthetic reaction centers.