Our results also same to be in concord with the study of Aldesuquy et al. (1998) on wheat plants which revealed an enhancement in the wheat plants by Streptomyces treatment and demonstrated that the used species (S. olivaceoviridis and S. rochei) produced substantial amounts of growth-regulating substances, including auxins, gibberellins and cytokinins, the matter which explains the direct effect on the plant growth.