Abstract

Indole Acetic Acid (IAA), a phytohormone, has been considered as the most important native auxin. The Amla (Phyllanthus emblica Linn.) serve as an abundance of IAA-producing sources fungus and produce significant quantities of IAA in tryptophan-added medium. Different concentration of L-tryptophan between 1, 2 and 5 mg/ml were chosen for the IAA production. The study shows that the corresponding L-tryptophan concentration was associated with a progressive rise in IAA generation. The impact on IAA production was anticipated to last up to 10 days, with the maximum IAA production being shown in an incubation period of 15 days. Four isolates in total were found to be IAA-producing strains; two of these produced IAA through medium components, and physical conditions were tuned for IAA production. The Amla stem and leaf tissues have the strongest growth-promoting effect in Aspergillus ustus (72 g/20 ml) among the isolates. The positive effects on crop development and yield are attributed to the presence of such growth-promoting fungus.

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