Interakcje Azospirillum spp. z mikroorganizmami glebowymi

Inoculation of various plants with Azospirillum spp. caused remarkable changes in the morphology of their root systems and a positive increase in plant growth when applied in combination with microsymbionts, such as VA-mycorrhizal fungi or Rhizobium. At concentration of 10⁸ cfu per plant the Azospirillum spp. stimulated the appe-roots arance of lateral roots and enhanced the appearance and number of adventitious roots as compared to non treated controls. Positive influence of Azospirillum spp. on the VA-mycorrhiza-plant symbiosis seemed to be less sensitive to circumstantial factors than the legume-Rhizobium symbiosis. The literature review mentioned that the two bacteria, Azospirillum and Rhizobium, may be competing with one another in the legume rhizosphere, thereby inhibiting nodule formation. VA mycorrhizal fungi-plant symbiosis and legume-Rhizobium symbiosis are two systems in which Azospirillum can improve the symbiotic performance of each of the microorganisms and potentially increase crop yields.