Transition metal transporters in rhizobia: tuning the inorganic micronutrient requirements to different living styles

摘要: A group of bacteria known as rhizobia are key players in symbiotic nitrogen fixation (SNF) partnership with legumes. After a molecular exchange, the end surrounded by plant membrane forming symbiosomes, organelle-like structures, where they differentiate to bacteroids and fix nitrogen. This process is highly dependent on dynamic nutrient exchanges between partners. Among these transition metals (TM) participating inorganic organic cofactors fundamental enzymes. While understanding how transporters facilitate TMs very near environment bacteroid expanding, our knowledge integrate TM homeostasis mechanisms host still limited. significantly relevant considering low solubility scarcity soils, crescendo gradient bioavailability faces during infection differentiation processes. In present work, we review main metal transporter families found rhizobia, their role free-living conditions and, when known, symbiosis. We focus discussing those which could play significant TM-dependent biochemical physiological processes bacteroid, thus paving way towards an optimized SNF.