Promotor of nod gene inducers and nodulation in common bean (Phaseolus vulgaris) roots inoculated with Azospirillum brasilense Cd

Coinoculation of Phaseolus vulgaris with Rhizobium and Azospirillum results in increased susceptibility to Rhizobium infection.It is caused by increase in the number of infectible root hairs and the nod gene induction from the enhanced secretion of flavonoids by the roots. Root hair density of bean seedlings increase significantly by inoculation with Azospirillum brasilense. Root exudates from the inoculated plants increases the level of nod gene inducing, flavonoid compounds.