Azospirillum bacteria are engaged in associative interactions with a wide range of plants. In this type of interaction, there formed no specialized structures like nodules, which are characteristic of the legume-Rhizobium symbiosis. The formation of biofilms by Azospirillum on the plant root surface can be important for the successful functioning of plant-microbe associations. Scarce data exist on the role of cell surface protein structures in the formation and stabilization of Azospirillum biofilms. It is known that as compared to A.
