№2, 2023
Morphological indicators of soybean plant grown in nutrient medium supplemented with copper sulfate
Summary
The effect of heavy metals on plants and their response to them is mainly subject to the “doseeffect” hypothesis, which has a two-phase character. That is, heavy metals in low concentrations can have a stimulating effect on plants, and in high concentrations, on the contrary, an inhibitory effect depending on the percentage of increase. Therefore, the article studied the morphological characteristics of a soybean plant inoculated with rhizobia nodule bacteria in the presence of copper sulfate. The object of study was soybean plants (Glicine hispida L.) of the “Bravo” variety, grown in the Begun modification at a temperature of 260 degrees. The plant seeds were inoculated with a strain of the nodule bacterium Rhizobium japonicum 648a purchased from the All-Russian Soybean Research Institute. Copper sulfate was used in concentrations of 6·10-5M, 6·10-4M and 3·10-3M. It was shown that high concentrations of copper sulfate had a inhibitory effect on the morphological indicators of soybean seedlings inoculated with rhizobium bacteria compared to the control, plants inoculated with the Rh. japonicum 648a strain form more nodules at a concentration of 6·10-4M, that is, the virulence of the seedlings increases by approximately 1.5 times, and their morphological indicators were also higher than the control.