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The aim of this study was to determine the elemental composition, phenolic content and composition and antioxidant properties ofImleria badia(Fr.) Vizzini (former namesBoletus badius(Fr.) Fr., andXerocomus badius(Fr.) E.-J. Gilbert) fruiting bodies collected from sites with different levels of pollution.Imleria badiawas relatively tolerant to soil contamination with toxic elements and was able to grow in As, Cd, Hg and Pb concentrations exceeding 15, 2.9, 0.4 and 77 mg kg−1, respectively. The concentration of elements in soil was reflected in the element content inI. badia. The fruiting bodies from polluted sites exhibited significantly higher content of all the analyzed elements. Among 21 individual phenolic compounds only protocatechiuc and caffeic acids, and quercetin were determined in fruiting bodies ofI. badia. The differences between the concentration of the quantified phenolic compounds and the total flavonoid content in fruiting bodies ofI. badiafrom unpolluted and polluted sites were not significant. However, the greatest total phenolic content was found in fruiting bodies from the polluted areas. The antioxidative capacity of mushrooms collected from heavily polluted sites was lower than those growing in unpolluted areas. The concentrations of some metals in soil and fruiting soil were positively correlated with phenolic content and IC50. [ABSTRACT FROM AUTHOR]

The aim of the study was to analyse levels of 17 trace elements and 5 major minerals in 11Boletus badiusfruiting bodies able to grow in extremely polluted waste (flotation tailings) and polluted soil in southern Poland. The presented data widen the limited literature data about the abilities of wild-growing mushroom species to grow on heavily contaminated substrates. Content of elements in waste, soil and mushrooms was analysed by flame atomic absorption spectrometry (FAAS) and cold vapour atomic absorption spectrometry (CVAAS - Hg). The industrial areas differed greatly as regards the content of elements in flotation tailings and soil; therefore differences in Ag, Ba, Cd, Co, Fe, Mo, Ni, Pb, Ca, K, Mg, Na and P accumulation in mushrooms were observed. The highest contents of elements in mushrooms were observed for: As, Al, Cu and Zn (86 ± 28, 549 ± 116, 341 ± 59 and 506 ± 40 mg kg−1dry matter, respectively). Calculated bioconcentration factor (BCF) values were higher than 1 for Al (15.1–16.9), Fe (10.6–24.4) and Hg (10.2–16.4) only. The main value of the presented results is the fact that one of the common wild-growing mushroom species was able to grow on flotation tailings containing over 22 g kg−1of As and, additionally, effective accumulation of other elements was observed. In view of the high content of the majority of analysed elements in fruiting bodies, edible mushrooms from such polluted areas are nonconsumable. [ABSTRACT FROM AUTHOR]