results of C,N and vitamin sources optimization suggested that the
sources have influence the bacterial strains in the nodulation
process,indicated by the enhanced growth and IAA production.
Spaepen etal.(2007) have reviewed the role of bacterial IAA in
bacteria–plant interaction and highlighted the fact that bacteria
use their phytohormone for interaction with the plants and for
colonization, including phytostimulation and circumvention of
basal plant defence mechanism.