Dependace of uptake and distribution of mercury in vegetable plants on increasing content of mercury in soil | Příjem a distribuce rtuti v rostlinách zelenin v závislosti na stupňovaném množství rtuti v půdě
2008
Rop, O., Thomas Bata Univ., Zlín (Czech Republic) | Valášek, P., Thomas Bata Univ., Zlín (Czech Republic) | Golian, J., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Hoza, I., Thomas Bata Univ., Zlín (Czech Republic)
The aim of this study was to study the effect of increasing mercury levels in soil on its uptake and distribution in selected vegetable plants. The experimental material consisted of lettuce (Lactuca sativa L. var. capitata DC.) -cultivar LEDNICKÝ, kohlrabi [Brassica oleracea L. var. gongylodes L.)-early cultivar MORAVIA, tomatoes (Lycopersicum esculentum Mill.)-F1-hybrid DOMINO, and potatoes (Solanum tuberosum L.)-very early cultivar KORUNA. The experiment was carried out in plastic vegetation pots placed in a roofed hall. Each pot contained 10 kg of earth. The experiment had three variants for each vegetable species, and the increasing doses of mercury were as follows: Variant 1=Control; Variant 2=0.8 mg Hg/kg of soil; Variant 3=3.2 mg Hg/kg of soil. Mercury content was measured in the apparatus AAS AMA-254. Increasing levels of mercury in soil showed a statistically significant (P less than 0.05) effect on its increasing content in individual plant organs. The most marked changes were found in roots; e.g. lettuce roots contained 1.231 mg and 28.138 Hg/kg DM in the control, and in the variant with the highest Hg content in soil, respectively. As compared with roots, statistically highly significant (P less than 0.01) decrease in the content of mercury in DM of tops was observed in all vegetable species under study. The lowest mercury contents were found in edible parts of plants.
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