Journal Article

PUBDB-2019-03780

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Localization, ligand environment, bioavailability and toxicity of mercury in Boletus spp. and Scutiger pes-caprae mushrooms

Kavčič, A.Extern* ; Mikuš, K. ; Debeljak, M. ; Teun van Elteren, J. ; Arčon, I.Extern* ; Kodre, A.Extern* ; Kump, P. ; Karydas, A. G. ; Migliori, A. ; Czyzycki, M.Extern* ; Vogel-Mikuš, K. (Corresponding author)Extern*

2019
Elsevier Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.ecoenv.2019.109623  doi:10.3204/PUBDB-2019-03780

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.

Note: © The Authors. Published by Elsevier Inc.

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Contributing Institute(s):

1. DOOR-User (DOOR)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)
2. FS-Proposal: I-20160764 EC (I-20160764-EC) (I-20160764-EC)
3. CALIPSOplus - Convenient Access to Light Sources Open to Innovation, Science and to the World (730872) (730872)

Experiment(s):

1. PETRA Beamline P64 (PETRA III)

Appears in the scientific report 2019

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