Endophytes are microorganisms which reside asymptomatically within a healthy plant without causing any detectable negative effect to the host plant. Plant Growth Promoting Fungus enhances plant growth through the production of secondary metabolites like indole acetic acid, siderophore, phosphate solubilization, Hydrogen Cyanide (HCN) and prevents the plant by its host defence interaction. In the present study, six endophytic fungi were isolated from the root of Casuarina junghuhniana (Casuarinaceae) which is an exotic actinorhizal multipurpose tree. Each fungal isolates were screened for its production of plant growth promoting traits. Anti-fungal activity was also studied against the fungal phytopathogens. Out of all the isolates, CJK1 which is identified as Aspergillus sp had the best plant growth enhancement traits.The effect of the potential isolate was tested for its plant growth promoting traits using Vigna radiata. Both the cell suspension and cell free broth of Aspergillus sp was treated with surfaced sterilized seed of Vigna radiata. The growth parameters (root-shoot length) were studied and compared with uninoculated control. These results imply that the potential fungal endophyte, Aspergillussp, acts as a promising bioinoculant in the agroforestry system for improvement of commercially important crop plants.