VALORIZATION OF TOMATO PLANT WASTES AND OPTIMIZATION OF GROWTH CONDITIONS FOR INDOLE-3-ACETIC ACID PRODUCTION BY Streptomyces plicatus STRAIN PT2

This study focused on the production of phytohormone indole-3-acetic acid (IAA) using tomato plant tissues as feedstock and highlighting its growth promotion effect seedlings. Twelve actinobacterial strains were screened for IAA under standard conditions strain Streptomyces plicatus PT2 was selected a promising producer. The establishment to increase by S. conducted Plackett-Burman mathematical design with seven variables. variables L-tryptophan quantity roots-extract rate two significant influencing production. most impacting optimized surface methodology (RSM) formulated according Central Composite Design (CCD). broth supplemented 4 mg L-1 25% significantly improved from 96.3 µg mL-1 within 120h maximum 110.29 96h. in-planta application produced chemical showed in dry weight, shoot root lengths is first showing exploring plant-growth efficacy compared marketed one. These results support reasonable approach valorization abundant worldwide wastes phytohormones bioprocesses.