Conference Publication Details
Mandatory Fields
LojŠn P, Demortier M., Velivelli S., Pfeiffer S., Vivan co O., Suarez JP., Doyle Prestwich B.,
Combination of Rhizobacteria and Rhizophagus irregularis into
In Press
Optional Fields
Mycorrhiza, rhizobacteria, potato, bioinoculant
The aim of the present study was to test the feasibility of using the encapsulation in alginate beads of different rhizobacteria strains with invitro produced spores of the Mycorrhizal Fungi: Rhizophagus irregularis; and evaluate the effects of bacteria on the symbiotic and symbiotic development of the fungal partner. Several bacterial strains were isolated and identified from 4 field plots in Ecuador. However, for the in-vitro tests only bacteria belonging to the Firmicutes group were selected due to their capacity to produce resistant spores. In total 30 strains were tested for antagonism against Phytophtora infestans and Rhizoctonia solani and their capacity to produce IAA (indolacetic acid), P solubilization and ACC deaminase capacity. Further, only ten bacterial strains were selected for the encapsulation with isolated spores of the AMF Rhizophagus irregularis MUCL41833. The results showed that one of these rhizobacteria strains identified as Paenibacillus sp (R47065) had a positive effect on asymbiotic development of R. irregularis spores (p<0.001). Afterwards, alginate beads containing propagules of R. irregularis and Paenibacillus sp. (R47065) were inoculated in close contact with the roots of three potato varieties (I-Fripapa, Bintjie and Unica) growing under autotrophic in-vitro systems. The results showed significant positive effects of the bacteria in the performance of R. irregularis, associated to the potato plants for most of the evaluated parameters.
VALORAM project supported by European
Grant Details