highly significantp ≤ 0.001
On the other hand, Penicillium commune EP-5 and Alternaria tenuissima EP-13 were highly significant ( p ≤ 0.001) in IAA production with values 132.8 ± 8.8 and 123.7 ± 3.4 μg mL −1 , respectively, as compared to other isolates ( p ≤ 0.01) in the presence of 1 mg mL -1 tryptophan.