Influence of copper sulfate on morphological traits and activity of catalases in soybean after inoculation by Bradyrhyzobium japonicum and Sinorhyzobium fredii

The influence of copper sulfate on morphological traits and catalase activity of soybean after inoculation by rhizobium was studied. It should be mentioned that improvement of morphological traits of soybean cultivated on nutrient medium after inoculation by strains TB-508 and 648a at presence of copper sulfate in concentration 6 10 M being an optimal one. A slow-growing strain 648a showed to have the highest virulence. Soybean plants inoculated by the strain TB-508 had a stable activity and stable number of the plural forms which characterize its high adaptability.