Indole-Producing microorganisms, especially those that produce indole-3-acetic-acid, have the ability to increase the number of roots and their dry weight in inoculated culture,which may ultimately lead to an increase of plant growth.
Endophytic isolates exhibited better results as promoting plant growth when compared to epiphytic isolates.
ิbacteria of the genus Paenibacillus are commonly reported as promoting plant growth and increasing root development.
Paenibacillus pabuli, an endophyte of cactus root, produces IAA in values similar to those observed in this research.
The mechanisms related to a better root growth of inoculated plants seem to be IAA biosynthesis.