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Arsenic concentrations, speciation, and localization in 141 cultivated market mushrooms: implications for arsenic exposure to humans.

07:00 EST 6th December 2018 | BioPortfolio

Summary of "Arsenic concentrations, speciation, and localization in 141 cultivated market mushrooms: implications for arsenic exposure to humans."

Mushrooms accumulate arsenic (As), yet As concentrations, speciation, and localization in cultivated mushrooms across a large geographic distribution are unknown. We characterized 141 samples of 9 species from markets in 9 capital cities in China, with samples of Lentinula edodes, Pleurotus ostreatus, and Agaricus bisporus being analyzed for As speciation and localization. Total As concentrations ranged 0.01-8.31 mg kg-1 dw, with A. bisporus (0.27-2.79 mg kg-1) containing the highest As followed by P. ostreatus and L. edodes (0.04-8.31 and 0.12-2.58 mg kg-1). However, As in A. bisporus was mostly organic including non-toxic arsenobetaine, while P. ostreatus and L. edodes contained mainly inorganic As (iAs). Based on in situ imaging using LA-ICP-MS, As in L. edodes was localized to the surface coat of the cap, while As in P. ostreatus was localized to the junction of the pileus and stipe. When As speciation and daily mushroom consumption (1.37 g d-1 dw) were considered, daily mushroom consumption may result in elevated iAs exposure, with bladder and lung cancer rates being up to 387 cases per 100,000. Our study showed market mushrooms could be a health risk to the general public and its production should be regulated.

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Name: Environmental science & technology
ISSN: 1520-5851
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