ROLE OF BACTERIAL SYMBIONTS IN PLANT-MICROBIAL ASSOCIATIONS
The facts about types of relations of microorganisms and plants were summarized. The influence of microorganisms in associations of rhizosphere bacteria and plants was studied. The data is based on variety of Russian and foreign scientists’ works about common bacterial symbionts, their influence at plant organism. Positive effect of PGPR at plants was studied. Plant-microbial associations are examined like an associative symbiosis, in which plant is macrosymbiont. Facts about trophical and protectial types of plant- microbial associations were noted.