il conditions.
The rootlength-promoting effect ofthe selected bacterial strains
is most probably due to their ability to ACC degradation and this
effect is observed only for isolates with high ACC deaminase activity.
ACC deaminase activity by plant -associated bacteria promotes
plant growth by decreasing the unfavorable effect of ethylene
synthesis. Five isolates showed growth on N-deficient medium
designed for N-fixing bacteria (Table 3). However, diazotrophic
capacity was evaluated using a qualitative agar plate method, and
future experiments should be carried out to confirm and quantify
the capacity of each strain. In the presence of bacterial inoculation
the plants growth was higher compared to uninoculated plants.
This confirms the properties of isolated bacteria to promote plants
growth. This study also indicates the different effects of selected
bacteria on the growth of two different plants. Strains contributing
positively to the growth of monocot plants do not necessarily have
the same effectin dicots plants. There is no universal bacterial inoculation
for the mono- and dicots plants. Future research requires
study on the effect of combining inoculation of particular lines with
each other. Single feature of PGPR might not be expressed in a given
conditions