Peculiarities of heavy metals accumulation by dooryard plantain’s leaves (<i>Plantago major</i> L.) in the urbanized territories

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The paper reveals the content of extractable zinc, cadmium and lead in the soil of the territories with different level of technological influence. The peculiarities of heavy metals storage by dooryard plantains leaves Plantago major L. are observed. The soils of the industrial zone are characterized by pollution with cadmium and lead compounds. The content of lead and zinc ions in dooryard plantains leaves P. major , growing in this region, oversteps the accepted values. The plant material picked in the suburbs of the city close to the forest zones is ecologically safe. According to increasing of accumulation features, heavy metals are located in the following order: lead cadmium zinc that reflects the degree of their importance for plants and the similarity of their physical and chemical indexes. The higher indexes of the storage coefficients for cadmium in comparison with lead are connected with its translocation into cells by carriers for zinc biophile element. The increase of zinc and cadmium content in the soil leads to decrease of accumulation of these ions in leaves. Lead gets into dooryard plantains leaves P. major from both through roots from the soil and through mouth apparatus of leaf epidermis from the air.