STUDIES OF THE INTERACTION BETWEEN I VA MYCORRHIZAL FUNGUS Glomus mosseae, Rhizobium phaseoll AND Xanthomonas phaseolilN BEAN PLANTS

Document Type : Original Article

Author

Agric. Microbiology Dept. Fac. of Agrlc., Mlnla Unlv.

Abstract

The tripartite association of bean plants VA Fungi and Rhizobium p aseoli
was studied in attempt to evaluate this association regarding plant growth. The results
of this study reveal that co-inoeulation of mycorrhizal fungi with Rhizobium p < /em>haseoli
increased the shoot dry weight, nodulation, accumulated nitrogen and phophorus as
well as nitrate reductase activity in bean plants. VA prevented Xanthomonas p 8seoli
to infect bean plants and improved plants growth. Nitrogen and phosp,horus
accumulation and nitrate reductase activity were also improved . The preserce of
mycorrhizal fungi suppressed the population density of the pathogenic bacterium in
the mizosphere of bean plants. The mycorrhiza Increased the plant resistance to X.
PhBSeoli more prominenUy in the presence of R. phBSeoIi.