Toxicity, metal uptake, and accumulation of phytochelatins in Silene vulgaris exposed to mixtures of cadmium and arsenate

• Published in: Environmental toxicology and chemistry Vol. 19; no. 12; pp. 2982 - 2986
• Main Authors: Sneller, F. Else C., Van Heerwaarden, Luisa M., Schat, Henk, Verkleij, Jos A. C.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Periodicals, Inc 01.12.2000; SETAC
• Subjects: Animal, plant and microbial ecology; Applied ecology; Arsenic; Biological and medical sciences; Cadmium; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on plants and fungi; Fundamental and applied biological sciences. Psychology; Mixture toxicology; Phytochelatins; Silene vulgaris; Cadmium; Poison interaction; Ecotoxicology; Arsenic; Weed; Root; Growth; Toxicity; Detoxication; Metabolism; Caryophyllaceae; Toxic association; Heavy metal; Dicotyledones; Angiospermae; Chelating agent; Spermatophyta; Biological accumulation; Elongation
• ISSN: 0730-7268; 1552-8618
• DOI: 10.1002/etc.5620191219

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.