Query: NC_007492:4563981 Pseudomonas fluorescens PfO-1, complete genome Lineage: Pseudomonas fluorescens; Pseudomonas; Pseudomonadaceae; Pseudomonadales; Proteobacteria; Bacteria General Information: This strain was isolated from agricultural loam (sand, clay, and organic matter) soil in 1988 by Compeau et al. and is well adapted to soil environments. Bacteria belonging to the Pseudomonas group are common inhabitants of soil and water and can also be found on the surfaces of plants and animals. Pseudomonas bacteria are found in nature in a biofilm or in planktonic form. Pseudomonas bacteria are renowned for their metabolic versatility as they can grow under a variety of growth conditions and do not need any organic growth factors. This organism is a nonpathogenic saprophyte which inhabits soil, water and plant surface environments. If iron is in low supply, it produces a soluble, greenish fluorescent pigment, which is how it was named. As these environmentally versatile bacteria possess the ability to degrade (at least partially) multiple different pollutants, they are studied in their use as bioremediants.
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General Information: This biovar nodulates legumes in the Tribe Viciae (Vicia, Pisum, Lathyrus, Lens). This strain is a spontaneous streptomycin-resistant mutant of strain 300. Nitrogen-fixing plant symbiont. This organism, like other Rhizobia, establishes a symbiotic relationship with a legume plant, providing nitrogen in exchange for a protected environment. The legume roots secrete flavonoids and isoflavonoids which the bacteria recognize and use to turn on genes involved in root nodulation. Many of the root nodulation genes are involved in synthesis and secretion of a nodule inducing signal, a lipochito-oligosaccharide molecule, which the plant recognizes, triggering nodule formation. The bacterium is endocytosed and exists inside a membrane bound organelle, the symbiosome, and fixes nitrogen for the plant cell while the host cell provides carbon compounds for the bacterium to grow on. The nitrogen fixation is important as it obviates the need for expensive and environmentally damaging fertilizer use.