Influence of Bacillus mycoides and Glomus mosseae, Indigenous to Contaminated Areas, on Nutrients and Cd Uptake by Maize in Cd-Polluted Soil

This research was conducted to evaluate the effects of single and co-inoculation of maize plant (Zea mays L.) with Bacillus mycoides and Glomus mosseae, both indigenous to the contaminated areas, on the growth, and nutrients (P, Fe, Zn and Mn) and cadmium uptake in the soil polluted with Cd (0, 100 and 200 mg/kg). At the levels of 0 and 100 Cd(mg/kg) there were observed the improvement of plant growth and symbiosis potential (root colonization and soil spore numbers), the increase of shoot nutrients (P, Fe, Zn and Mn) uptake and the decrease of Cd concentration and uptake in root and shoot of plants co-inoculated with B. mycoides and G. mosseae in comparsion with single inoculation of plant with B. mycoides. At the level of 200 Cd (mg/kg), plants inoculation with G. mosseae was the most effective treatment in plant growth improvement and nutrients uptake. Co-inoculation of plants with B. mycoides and G. mosseae increased and decreased root and shoot Cd uptake respectively compared to the plants colonized with G. mosseae. As the levels of Cd increased, plants colonized with Glomus mosseae had higher amount of biomass, root colonization, shoot P, Fe, Zn and Mn concentration and uptake, and Cd uptake of shoot and root than those of the control plants. At levels of 100 and 200 Cd (mg/kg), the most effective treatments in Cd uptake of the plant were control and inoculated treatments wtith G. mosseae respectively.