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Title:Localization, ligand environment, bioavailability and toxicity of mercury in Boletus spp. and Scutiger pes-caprae mushrooms
Authors:ID Kavčič, Anja (Author)
ID Mikuš, Klemen (Author)
ID Debeljak, Marta (Author)
ID Elteren, Johannes Teun van (Author)
ID Arčon, Iztok, UNG (Author)
ID Kodre, Alojz (Author)
ID Kump, Peter (Author)
ID Karydas, Andreas-Germanos (Author)
ID Migliori, Alessandro (Author)
ID Czyzycki, Mateusz (Author)
ID Vogel-Mikuš, Katarina (Author)
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Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract: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 L3-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.
Keywords:edible mushrooms, HgSe complex, imaging of elemental distribution, LA-ICP-MS, alpha-XRF, XAS
Publication version:Version of Record
Year of publishing:2019
Number of pages:13.
Numbering:#Vol. #, 184
PID:20.500.12556/RUNG-4818-9e9fda43-5644-5dde-af54-8063e8458897 New window
COBISS.SI-ID:5154895 New window
ISSN on article:0147-6513
DOI:10.1016/j.ecoenv.2019.109623 New window
Publication date in RUNG:24.10.2019
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Record is a part of a journal

Title:Ecotoxicology and environmental safety
Shortened title:Ecotoxicol. environ. saf.
Publisher:Academic Press.
COBISS.SI-ID:25368320 New window