Query: NC_015717:4736500 Hyphomicrobium sp. MC1, complete genome
Lineage: Hyphomicrobium; Hyphomicrobium; Hyphomicrobiaceae; Rhizobiales; Proteobacteria; Bacteria
General Information: Nitrogen fixation. Hyphomicrobium sp. (strain MC1) is a chloromethane-degrading Gram-negative bacterium isolated from industrial sewage sludge and from enrichment cultures originating from leaves of A.thaliana grown with chloromethane as the sole carbon source.
Subject: NC_008380:58232 Rhizobium leguminosarum bv. viciae 3841, complete genome
Lineage: Rhizobium leguminosarum; Rhizobium; Rhizobiaceae; Rhizobiales; Proteobacteria; Bacteria
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.