Localization, ligand environment, bioavailability and toxicity of mercury in Boletus spp. and Scutiger pes-caprae mushrooms.

Autor: Kavčič A; University of Ljubljana, Biotechnical Faculty, Department of Biology, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia., Mikuš K; Biotechnical Educational Centre Ljubljana, Cesta V Mestni Log 47, SI-1000, Ljubljana, Slovenia., Debeljak M; National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia., Teun van Elteren J; National Institute of Chemistry, Hajdrihova 19, SI-1000, Ljubljana, Slovenia., Arčon I; Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia; University of Nova Gorica, Vipavska 13, SI-5000, Nova Gorica, Slovenia., Kodre A; Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia; University of Ljubljana, Faculty for Mathematics and Physics, Jadranska 19, SI-1000, Ljubljana, Slovenia., Kump P; Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia., Karydas AG; Institute of Nuclear and Particle Physics, National Centre for Scientific Research 'Demokritos', Patr. Grigoriou E' & 27 Neapoleos St, 153 41, Agia Paraskevi, Greece., Migliori A; Nuclear Science and Instrumentation Laboratory, International Atomic Energy Agency (IAEA) Laboratories, A-2444, Seibersdorf, Austria., Czyzycki M; Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation, Laboratory for Applications of Synchrotron Radiation, Kaiserstrasse 12, 76131, Karlsruhe, Germany; AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-059, Krakow, Poland., Vogel-Mikuš K; University of Ljubljana, Biotechnical Faculty, Department of Biology, Jamnikarjeva 101, SI-1000, Ljubljana, Slovenia; Jozef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia. Electronic address: katarina.vogelmikus@bf.uni-lj.si.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2019 Nov 30; Vol. 184, pp. 109623. Date of Electronic Publication: 2019 Sep 10.
DOI: 10.1016/j.ecoenv.2019.109623
Abstrakt: This study provides information on mercury (Hg) localization, speciation and ligand environment in edible mushrooms: Boletus edulis, B. aereus and Scutiger pes-caprae collected at non-polluted and Hg polluted sites, by LA-ICP-MS, SR-μ-XRF and Hg L 3 -edge XANES and EXAFS. Mushrooms (especially young ones) collected at Hg polluted sites can contain more than 100 μg Hg g -1 of dry mass. Imaging of the element distribution shows that Hg accumulates mainly in the spore-forming part (hymenium) of the cap. Removal of hymenium before consumption can eliminate more than 50% of accumulated Hg. Mercury is mainly coordinated to di-thiols (43-82%), followed by di-selenols (13-35%) and tetra-thiols (12-20%). Mercury bioavailability, as determined by feeding the mushrooms to Spanish slugs (known metal bioindicators owing to accumulation of metals in their digestive gland), ranged from 4% (S. pes-caprae) to 30% (B. aereus), and decreased with increasing selenium (Se) levels in the mushrooms. Elevated Hg levels in mushrooms fed to the slugs induced toxic effects, but these effects were counteracted with increasing Se concentrations in the mushrooms, pointing to a protective role of Se against Hg toxicity through HgSe complexation. Nevertheless, consumption of the studied mushroom species from Hg polluted sites should be avoided.
(Copyright © 2019 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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