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Toxicity, metal uptake, and accumulation of phytochelatins in Silene vulgaris exposed to mixtures of cadmium and arsenate
Author(s) -
Sneller F. Else C.,
Van Heerwaarden Luisa M.,
Schat Henk,
Verkleij Jos A. C.
Publication year - 2000
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620191219
Subject(s) - cadmium , arsenate , toxicity , chemistry , environmental chemistry , metal , metal toxicity , silene , chelation , elongation , heavy metals , botany , arsenic , biology , inorganic chemistry , organic chemistry , materials science , ultimate tensile strength , metallurgy
The mixture effects of arsenate and cadmium were studied in Silene vulgaris (Moench) Garcke. The results show that the toxicity of the mixtures, measured as inhibition of root elongation, increased with increasing concentrations, ranging from nonadditive or slightly additive to synergistic. The elements did not influence each other's uptake. This was as expected, considering the differences in uptake mechanisms between both elements. Concentrations of detoxifying phytochelatins (PCs) were additive, with respect to both external and root‐internal metal concentrations. However, at high exposure concentrations, the plants metabolism collapsed, resulting in very low PC concentrations.