Based on above results it may be concluded that PGPR strains
formed colonies on the root surface of bananas where more bacterial
cells were found in the root hair proliferation zone. The PGPR
inoculation increased root growth where application of minimal
N-fertilizer (33%) and inoculation produced a synergistic effect on
root growth and development, which resulted in increased N, yield
by N2 fixation in association with banana roots. PGPR inoculation
with 33% N-fertilizer increased the shoot growth and photosynthetic
activity of banana plants. Therefore, it may be suggested
that PGPR strains (Sp7 and UPMB 10) inoculation with minimal
N-fertilizer supply are effective as a bioenhancer and biofertilizer
to fix N2 and increase plant growth, nutrient uptake, yield and fruit
qualities of bananas.