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Sinorhizobium melilotiSymbiosisMedicago sativaSinorhizobiumMedicago truncatulaNitrogen FixationBacterial ProteinsSinorhizobium frediiMedicagoPlant Root NodulationWaste WaterWaste Disposal, FluidBacteriaGene Expression Regulation, BacterialRoot Nodules, PlantRhizobiumSewageGenes, BacterialRhizobiaceaePolysaccharides, BacterialPlant RootsMolecular Sequence DataWater PurificationDNA, BacterialIndustrial WasteRhizobium leguminosarumMelilotusFabaceaeLuteolinSequence Analysis, DNAWater MicrobiologyGenome, Bacterial

BiologicalSynthesizeCellsBegins

Biological2

• But some species are also able to establish a relationship with marine or terrestrial bacteria that can use nitrogen from the air: this is the biological nitrogen fixation. (encyclopedie-environnement.org)
• Biological fixation of atmospheric nitrogen is only achieved by bacteria. (encyclopedie-environnement.org)

Synthesize2

• Gtfs even bind to the bacteria that do not synthesize Gtfs, and therefore, facilitate interspecies and interkingdom coadhesion. (wikipedia.org)
• In response to the secretion of flavonoids* by the root (Figure 3), bacteria are attracted to it and synthesize lipo-chito-oligosaccharides*, called nod factors (for nodulation). (encyclopedie-environnement.org)

Cells2

• Bacteria enter the root and the cortex cells divide. (encyclopedie-environnement.org)
• They can be found very early in Earth's fossil records (about 3.25 billion years ago) as both Archaea and Bacteria, and commonly protect prokaryotic cells by providing them with homeostasis, encouraging the development of complex interactions between the cells in the biofilm. (wikipedia.org)

Begins2

• It is through the mutual recognition of the two partners (the plant and the bacteria) that the symbiotic process begins. (encyclopedie-environnement.org)
• A biofilm usually begins to form when a free-swimming bacterium attaches to a surface. (wikipedia.org)