Indole acetic acid (IAA) content in the culture filtrate of various endophytic fungal strains.

L-tryptophan-dependent Czapek media was used to grow fungal strains for 7 days. A standard in the same media was also read to yield a standard curve (R² = 0.9985). A total of five replications (100 ml in each Erlenmeyer flask) were used to make sure the validation of IAA results. The bars representing different letters show that the mean values are significantly different from each other, as evaluated by the DMRT test (P<0.05).