20.500.12556/RUL-128263 Localization, ligand environment, bioavailability and toxicity of mercury in Boletus spp. and Scutiger pes-caprae mushrooms 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. edible mushrooms HgSe complex imaging of elemental distribution LA-ICP-MS μ-XRF XAS true false true Angleški jezik Ni določen Članek v reviji 2021-07-07 16:01:45 2021-07-07 16:01:46 2022-09-07 04:14:03 0000-00-00 00:00:00 2019 0 0 11 str. Vol. 184, art. 109623 Nov. 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 577 0147-6513 10.1016/j.ecoenv.2019.109623 5154895 RAZ_Kavcic_Anja_2019.pdf RAZ_Kavcic_Anja_2019.pdf 1 DA787E01C4629E118EFDDF8BFA91C2A8 6af3f72da6eb6756ecc90dd22cc3ee3f706ff4817484db406f9b803e75e1b36f 0016f5e2-df2c-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144948 https://www.sciencedirect.com/science/article/pii/S0147651319309546 0 e5b07e4c-df2b-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=144947 Biotehniška fakulteta Fakulteta za matematiko in fiziko 0 0 0