Localization, ligand environment, bioavailability and toxicity of mercury in Boletus spp. and Scutiger pes-caprae mushrooms
ID Kavčič, Anja (Author), ID Mikuš, Klemen (Author), ID Debeljak, Marta (Author), ID Elteren, Johannes Teun van (Author), ID Arčon, Iztok (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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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.

Keywords:edible mushrooms, HgSe complex, imaging of elemental distribution, LA-ICP-MS, μ-XRF, XAS
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
FMF - Faculty of Mathematics and Physics
Publication status:Published
Publication version:Version of Record
Number of pages:11 str.
Numbering:Vol. 184, art. 109623
PID:20.500.12556/RUL-128263 This link opens in a new window
ISSN on article:0147-6513
DOI:10.1016/j.ecoenv.2019.109623 This link opens in a new window
COBISS.SI-ID:5154895 This link opens in a new window
Publication date in RUL:07.07.2021
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Title:Ecotoxicology and environmental safety
Shortened title:Ecotoxicol. environ. saf.
COBISS.SI-ID:25368320 This link opens in a new window


License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.


Funder:ARRS - Slovenian Research Agency
Project number:P1-0212
Name:Biologija rastlin

Funder:ARRS - Slovenian Research Agency
Project number:P1-0112
Name:Raziskave atomov, molekul in struktur s fotoni in delci

Funder:ARRS - Slovenian Research Agency
Project number:P1-0034
Name:Analitika in kemijska karakterizacija materialov ter procesov

Funder:ARRS - Slovenian Research Agency
Project number:P3-0395
Name:Prehrana in javno zdravje

Funder:ARRS - Slovenian Research Agency
Project number:J7-9418
Name:Raziskave ionoma kulturnih rastlin za pridelavo varne in kakovostne hrane

Funder:ARRS - Slovenian Research Agency
Project number:J7-9398
Name:Molekularno slikanje v celici

Funder:ARRS - Slovenian Research Agency
Project number:J1-8156
Name:Stabilni izotopi pri študiju vpliva naraščajoče koncentracije CO2 na kroženje C in Hg v obalnem morju

Funder:ARRS - Slovenian Research Agency
Project number:N1-0060
Name:Napredni 2D in 3D kemični zemljevid z uporabo laserske ablacije ICP - masne spektrometrije (LA-ICP-MS) in dopolnilne multimodalne tehnike fuzije slik

Funder:ARRS - Slovenian Research Agency
Funding programme:Young Researcher

Funder:Other - Other funder or multiple funders
Funding programme:International Atomic Energy Agency
Project number:1917
Name:Experiments with Synchrotron Radiation for Modern Environmental and Industrial Applications

Funder:EC - European Commission
Funding programme:H2020
Project number:730872
Name:Convenient Access to Light Sources Open to Innovation, Science and to the World

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