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

Kavčič, Anja (avtor), Mikuš, Klemen (avtor), Debeljak, Marta (avtor), Elteren, Johannes Teun van (avtor), Arčon, Iztok (avtor), Kodre, Alojz (avtor), Kump, Peter (avtor), Karydas, Andreas-Germanos (avtor), Migliori, Alessandro (avtor), Czyzycki, Mateusz (avtor), Vogel-Mikuš, Katarina (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: edible mushrooms, HgSe complex, imaging of elemental distribution, LA-ICP-MS, μ-XRF, XAS
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta ; FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2019
• Št. strani: 11 str.
• Številčenje: Vol. 184, art. 109623
• PID: 20.500.12556/RUL-128263
• UDK: 577
• ISSN pri članku: 0147-6513
• DOI: 10.1016/j.ecoenv.2019.109623
• COBISS.SI-ID: 5154895
• Datum objave v RUL: 07.07.2021

Gradivo je del revije

• Naslov: Ecotoxicology and environmental safety
• Skrajšan naslov: Ecotoxicol. environ. saf.
• Založnik: Academic Press.
• ISSN: 0147-6513
• COBISS.SI-ID: 25368320

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.