Indole-3-acetic acid (IAA) is an important phytohormone that coordinates different developmental processes in plants. IAA production is also wide spread among plant associated bacteria and play very critical role in plant growth and development (Costacurta and Vanderleyden 1995; Khalid et al. 2004). It is very likely that plant growth promotion by rhizobacteria is the result of combined action of several ways, but production of phytohormones (especially IAA) is considered as a direct mechanism used by bacteria to increase the growth and yield of plants (Arkhipova et al. 2005; Idris et al. 2007). The role of plant growth promoting bacteria (PGPB) have been extensively studied as biofertilizers to increase the yield of agronomically important crops such as wheat (Khalid et al. 2004), corn (Mehnaz and Lazarovits 2006) and lettuce (Arkhipova et al. 2005). Biosynthesis of IAA is considered very crucial in plant growth and development; therefore, the potential of microbial strains to enhance in planta IAA content can be used as a basic criterion for the selection of effective PGPB. The main objective of this research work was to evaluate the ability of bacterial strains associated with wild herbaceous flora to enhance in planta IAA content and growth of Triticum aestivum L. var. Inqalab-91 under axenic and wire house conditions. Bacterial strains from these plants are not reported for their growth promoting activities in relation to their auxin production.