Accumulation and distribution of chemical elements in Taraxacum officinale (L.) Weber ex F.H. plants. Wigg of the Transbaikal region

The study presents data on the peculiarities of accumulation of some chemical elements in soils and organs of Taraxacum officinale growing in Duldurginsky and Akshinsky districts of Transbaikal Territory. The content of chemical elements in the studied samples was determined by X-ray fluorescence analysis. It was found that the content of gross and mobile forms of elements in soils of Akshinsky district is higher than in soil samples of Duldurginsky district. According to geoaccumulation index soils were characterised as practically uncontaminated. According to the content of elements in the organs of the studied species as a whole it is possible to build a series: Fe Zn Mn Cu Ni Co Pb. Calculation of root barrier coefficients showed that barrier type of accumulation is characteristic for Zn, Mn, Cu, Pb. Exceedances of MPC (dry vegetables) in the above-ground and underground parts of the plant for Zn and Cu were detected, while exceedances of MPC (for medicinal raw materials) for Pb were not detected.