ABSTRACT
The interactions between VA mycorrhizal fungus Glomus mosseae, the pathogenic bacterium Pseudomonas syringae, in the presence or absence of Bradyrhizobium japonicum on some physiological parameters of soybean plants were investigated. The results revealed that co- inoculation of G. mosseae with B. japonicum increased the shoot dry weight, nodulation, accumulated nitrogen and phosphorus as well as nitrate reductase activity in soybean plants. G. mosseae prevented P. syringae from infecting soybean plants and improved the plants growth. Nitrogen and phosphorus accumulation and nitrate reductase activity. The presence of the mycorrhizal fungus suppressed the population density of the pathogenic bacterium in the rhizosphere of soybean plants. The mycorrhiza increased the plant resistance to P. syringae more prominently in the presence of B. japonicum