The work considers accumulation and features of localization of heavy metals (cadmium, nickel and copper) in the duckweed fronds with histochemical methods. The dependence of the intensity of staining duckweed fronds on metal concentration in the water and time of staying of the plant was shown. Based on these data a histochemical study of common duckweed from a natural water body was conducted. Parallel to that quantitative analysis of water from the same source for heavy metal content was carried. It was found that the presence/absence of staining of the fronds and its intensity may indicate the presence of some heavy metals in water.
тяжелые металлы, ряска, гистохимические методы, heavy metals, duckweed, histochemical methods
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