It is hypothesized that the secretion of IAA may modify the microhabitat of epiphytic bacteria by
increasing nutrient leakage from plant cells; enhanced nutrient availability may better enable IAAproducing
bacteria to colonize the phyllosphere and may contribute to their epiphytic
fitness [19].
Bacterial IAA can obviate to a certain extent the function of ACC deaminase and siderophore
producing bacteria and phosphate solubilizing bacteria