title: Effect of cadmium on selected physiological and morphological parameters in metallicolous and non-metallicolous populations of Echium vulgare L.
abstract: Cadmium tolerance of three populations of Echium vulgare L., naturally occurring on two Zn-Pb waste deposits (metallicolous populations M1, M2) and on an uncontaminated site (non-metallicolous population, NM) was investigated. The plants were cultivated in hydroponics at 0, 5, 15, 30, or 50μM Cd for 14 days. Although Cd reduced the content of photosynthetic pigments indifferently in the three populations, plant growth parameters and root viability analyses confirmed different Cd tolerances decreasing in the order M1>M2>NM in the populations studied. Organic acids (tartrate, malate, citrate, succinate) were not responsible for the elevated Cd tolerance of the metallicolous populations, although malate and citrate might participate in Cd detoxification in the roots of the M1 and M2. Phytochelatin concentrations were higher in the roots of M1 and M2 populations of E. vulgare, suggesting their role in Cd detoxification and different Cd tolerances.
authors.affiliation: Department of Plant Physiology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland. Electronic address: slawomir.dresler@poczta.umcs.lublin.pl.
authors.forename: Sławomir
authors.initials: S
authors.lastname: Dresler
authors.affiliation: Department of Agricultural and Environmental Chemistry, University of Life Sciences, Akademicka 15, 20-950 Lublin, Poland. Electronic address: wieslaw.bednarek@up.lublin.pl.
authors.forename: Wiesław
authors.initials: W
authors.lastname: Bednarek
authors.affiliation: Department of Plant Physiology, Institute of Biology and Biochemistry, Maria Curie-Skłodowska University, Akademicka 19, 20-033 Lublin, Poland. Electronic address: mwojcik@umcs.pl.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Wójcik
mesh_terms: D002104:Cadmium / Q000378:metabolism / Q000493:pharmacokinetics / Q000633:toxicity*; D004361:Drug Tolerance; D036661:Echium / Q000737:chemistry / Q000187:drug effects* / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D018527:Hydroponics; D008658:Inactivation, Metabolic; D010788:Photosynthesis / Q000187:drug effects; D054811:Phytochelatins / Q000378:metabolism; D010860:Pigments, Biological / Q000032:analysis; D018517:Plant Roots / Q000737:chemistry; D012989:Soil Pollutants / Q000633:toxicity*
chemical_list: D010860:Pigments, Biological; D012989:Soil Pollutants; D002104:Cadmium; D054811:Phytochelatins; D005978:Glutathione
keywords: Cadmium tolerance; Echium vulgare L.; Organic acids; Phytochelatin; Proline; Pseudometallophyte