Signaling during early stages of legume–rhizobium symbiosis is of great interest from many years because legumes provide high environmental and agricultural benefits for humans, among them are important sources of food, feed, and biofuel crops.
Over the last decade, our understanding of this “molecular dialog” between both symbiotic partners: host plants and their microsymbionts, has grown immensely, leading to broadening our knowledge of early stages of these plant–microbe interactions.
The availability of reduced nitrogenous compounds in soil is a major limiting factor for plant growth and effectiveness of agricultural crops.
Because of this reason, the process of biological nitrogen fixation conducted by symbiotic soil bacteria collectively called rhizobia is crucial for providing high amounts of nitrogen forms available for plants.
The establishment of symbiosis is a complex process, in which multiple signals and cell-surface compounds derived from both the host plant and bacteria are involved, among them flavonoids and rhizobial lipochitin oligosaccharides play crucial roles.
Via Jean-Michel Ané