Abstract
Interactions between the arbuscular mycorrhizal fungus (AMF) Glomus mosseae and two soil yeasts (Saccharomyces cerevisiae and Candida sake) and their effects on faba bean plants were studied in a pot experiment in sterile, phosphorus (P) deficient soil. These organisms interacted synergistically when added consecutively at 2-week intervals, where sporulation, root infection with G. mosseae and the populations of either soil yeast species were significant with dual inoculation, especially when soil yeast species were inoculated for two weeks prior to sowing. Plant shoot dry weight, uptake of nitrogen (N) and P by the shoots, as well as nodulation and nitrogenase activity of faba bean roots were improved by inoculation with either G. mosseae or the two soil yeast species. Soil yeast species S. cerevisiae was more effective than C. sake. Dual inoculation was more effective on growth, nutrition nodulation and nitrogenase activity than individual inoculation.