Reaction of pea plants on inoculation by rhizosphere 1-aminocyclopropane-1-carboxylate (ACC) utilizing bacteria in the presence of endomycorrhizal fungus Glomus intraradices

In vegetationpot experiment with pea genotypes contrasting for efficiency of endomycorrhizal symbiosis (high-efficient genotype 8599 and low-efficient genotype 1025), the plants were grown in the presence or in the absence of endomycorrhizal fungus Glomus intraradices CIAM8 and inoculated bywith associative bacteria Pseudomonas brassicacearum Am3 or Pseudomonas putida Bm3 withcontaining ACC deaminase. The inoculation of 8599 genotype bywith Am3 strain increases the biomass of sprouts shoots and roots by 60 % for plants without mycorrhiza. In plants with mycorrhiza both strains determined the increased of shoot sprouts biomass by 40 %, and also roots biomass by 40 % (Am3 strain) and by 70 % (Bm3 strain). The influence of mycorrhiza and bacteria on the growth inof genotype 1025 is insignificantnot revealed. After mycorrhization of genotype 8599 the associative bacteria reduced the nitrogen content in shootsprouts by 20 %, but in the absence of mycorrhiza they raised the phosphorus content in genotype 1025 by 25 % (Am3 strain) and by 50 % (Bm3 strain). At a high and similar t the equally high degree of development of mycorrhiza development in both pea genotypes the Bm3 strain decreased the number of arbuscles and vesicles in roots of genotype 8599 plants. These results are of interest for more effective application of biopreparations and breeding of the varieties with high symbiotrophity.