Fig. 4From: Screening and optimization of indole-3-acetic acid production by Rhizobium sp. strain using response surface methodologyIsoresponses plot for the IAA production optimization by considering both incubation temperature and pH factors and by fixing the concentrations of L-Trp at 1 g/l and NaCl at 0.1 g/l and the incubation time at 1 dayBack to article page