Transfer of 137Cs into onion (Allium cepa L.) under conditions of hydroponic model experiment

2nd International (15th Regional) Scientific Conference "Technogenic Systems and Environmental Risk"

工业技术（总论）;生态环境科学

Godyaeva, M.M.^1 ; Paramonova, T.A.^1 ; Kuzmenkova, N.V.^2

Department of Radioecology and Ecotoxicology, Faculty of Soil Science, Moscow State University, Moscow, Russia^1

Department of Radiochemistry, Faculty of Chemistry, Moscow State University, Moscow, Russia^2

关键词: Biological barrier;    External environments;    Green leaves;    High activity;    Hydroponic experiments;    Mass exchange;    Model experiments;    Root uptake;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/487/1/012015/pdf
DOI  :  10.1088/1757-899X/487/1/012015

来源: IOP

【 摘 要 】

Short-term hydroponic experiment was conducted to evaluate intensity of the 137Cs transfer from a solution with extremely high activity of the radionuclide into onion, considering different plant's compartments (green leaves, bulbs, roots). It has been revealed that the root uptake of 137Cs was significantly discriminated, and not exceeded 0.01% of the total amount of radionuclide contained in the solution. At the same time, biometric indices of the plants - shoot height, roots elongation, phytomass inventory and structure - under conditions of 137Cs stress exposure were not significantly changed in comparison with the control. The main accumulation of 137Cs, which incorporated into onion, occurred in roots, especially in root tips, which are most actively involved in the processes of mass exchange between the plant and the external environment. The translocation of 137Cs into the shoot part, including the onion bulb and green leaves, was significantly suppressed, which allows considering the root system of onion as a biological barrier providing the rhizofiltration of the toxicant.