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Potential of non-symbiotic plant growth promoting rhizobacteria (PGPR) to influence the endogenous indole-3-acetic acid (IAA) content and growth of Vigna radiata (L.) was evaluated. The bacterial strains used belonged to Pseudomonas, Escherichia, Micrococcus and Staphylococcus genera. All strains were able to produce IAA (1.16–8.22 μg ml⁻¹) in the presence of 1,000 μg ml⁻¹ of l-tryptophan as revealed by gas chromatography and mass spectrometric (GC–MS) analysis. However, strains exhibited variable results for other growth promoting traits such as phosphate solubilization and siderophore or hydrogen cyanide production. Bacterial IAA production showed significant positive correlation with endogenous IAA content of roots (r = 0.969; P = 0.01) and leaves (r = 0.905; P = 0.01) under axenic conditions. Bacterization of V. radiata seeds significantly enhanced shoot length (up to 48.10%) and shoot …