Physiological role of calcium in legume-rhizobium symbiosis

Literature data on the physiological role of calcium (Ca2+) in legume-rhizobium symbiosis development on initial stages the infection and symbiotic structures formation, are generalized. The questions about the Ca2+ function in plants, special feature the formation of legume-rhizobium symbiosis and role of calcium in the interaction of two organisms are considered. Data on the interaction of ROS and Ca2+ in the development of the legume-rhizobium symbiosis and the relationship of NADPH-oxidase activity with the calcium signaling system are analyzed. The special attention is given to the role of Ca2+-spiking and calcium and calmodulinlike kinase in the initiation of plant symbiotic ways operation leads to infection and the formation of symbiotic structures.