Metal Content Profiles in Mushrooms Collected in Primary Forests of Latin America

Michelot, D.; Poirier, F.; Melendez-Howell, L. M.

doi:10.1007/s002449900469

Cited by 16 publications

(11 citation statements)

References 12 publications

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“…This is consistent with previous studies (Kalac et al 1991, 1996, Barcan et al 1998, Garcia et al 1998, Michelot et al 1999.…”

Section: Resultssupporting

confidence: 83%

“…Several samples of wild fungi did show the ability to accumulate some relatively high concentrations of certain elements, especially cadmium, copper, arsenic, mercury, zinc and lead. This is consistent with earlier studies, which show that certain fungi can accumulate very high concentrations of metals (Anon 1998, Barcan et al 1998, Farago et al 1998, Garcia et al 1998, Hees et al 1998, Kalac et al 1991, 1996, Michelot et al 1999, Falandysz et al 2004.…”

Section: Fungisupporting

confidence: 82%

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Multi-element survey of wild edible fungi and blackberries in the UK

Weeks

Croasdale

Osborne

et al. 2006

Food Additives and Contaminants

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A survey of 12 metals including lead (Pb), copper (Cu), cadmium (Cd), mercury (Hg), arsenic (As) and platinum (Pt) was carried out using ICP-MS in 34 samples of wild fungi and 48 samples of wild blackberries collected from sites across the UK. On a fresh weight basis (mg/kg) levels of Pb were in the range 0.003-5.990, Cu 0.596-34.800, Cd < 0.001-19.6, Hg < 0.001-4.150, As 0.001-0.972 and Pt (mg/kg) 0.006-0.200, with higher concentrations found in fungi than in blackberries. The results of the survey showed that the concentrations of the metals were consistent with previous studies, where available. Concentrations in wild fungi of Pt, tin (Sn), and titanium (Ti) were significantly higher at urban sites than at rural sites. Urban blackberries had significantly higher levels of Pb, Ti, and Cd than rural ones, but lower levels of manganese (Mn). Pb, Ti and Sn concentrations were significantly higher in blackberries sampled near main roads rather than in rural areas.

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“…This is consistent with previous studies (Kalac et al 1991, 1996, Barcan et al 1998, Garcia et al 1998, Michelot et al 1999.…”

Section: Resultssupporting

confidence: 83%

Section: Fungisupporting

confidence: 82%

Multi-element survey of wild edible fungi and blackberries in the UK

Weeks

Croasdale

Osborne

et al. 2006

Food Additives and Contaminants

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“…Other authors have already quantified total Cr in mushrooms, with maximum and minimum referred values of 0.2 and 2.0 µg/g (5), 0.8 and 7.52 µg/g (2), and 0.0 and 56.0 µg/g (13). In a recent study, in which only two edible species were analyzed, the chromium contents were 16.2 and 32.1 µg/g (1).…”

Section: Resultsmentioning

confidence: 98%

Validation of an Electrothermal Atomization Atomic Absorption Spectrometry Method for Quantification of Total Chromium and Chromium(VI) in Wild Mushrooms and Underlying Soils

Figueiredo

Soares

Baptista

et al. 2007

J. Agric. Food Chem.

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An ETAAS method was validated to quantify total Cr and Cr VI in mushrooms and the underlying soils. The method includes a sample pretreatment for total Cr dissolution using a wet acid digestion procedure and a selective alkaline extraction for Cr VI . The limits of detection were, expressed in µg/L, 0.15 and 0.17 for total Cr and Cr VI , respectively. The linearity ranges under the optimized conditions were 0.15-25.0 and 0.17-20.0 µg/L for total Cr and Cr VI , respectively. The limits of quantification were, expressed in µg/g of dry weight, 0.0163 and 0.0085 for total and hexavalent chromium, respectively. The precision of the instrumental method for total Cr and Cr VI was lower than 1.6%, and for the analytical method, it was lower than 10%. The accuracy of the method for Cr VI quantification was evaluated by the standard additions method, with the recoveries being higher than 90% for all of the added concentrations. For total Cr, certified reference materials (lichen CRM 482 and soil sample NCS ZC73001) were used. An interference study was also carried out in a mushroom simulated matrix, and it was verified that the deviations of the expected values were lower than 4.0% for both total Cr and Cr VI . The validated method was applied to the evaluation of total Cr and Cr VI in 34 wild mushrooms and 34 respective underlying soil samples collected in two different regions of Portugal (Beira Interior and Trá s-os-Montes), with different locations regarded as noncontaminated or contaminated areas. The species were identified by a mycologist and subdivided into 10 genera and 15 species: Amanita (rubescens, muscaria, and ponderosa), Boletus (regius), Lactarius (deliciosus, vellereus, and piperatus), Suillus (granulatus and luteus), Tricholoma (acerbum), Agaricus (sylvicola), Volvariella (gloiocephala), Lecopaxillus (giganteus), Macrolepiota (procera), and Psilocybe (fascicularis). The mean values found for total Cr were 1.14 and 1.11 µg/g of dry weight, and for Cr VI , the mean values were 0.103 and 0.143 µg/g of dry weight for cap and stalk, respectively. For soils, the mean concentrations found were, for total Cr, 84.0 µg/g and, for Cr VI , 0.483 µg/g. The bioconcentration factors (BCFs) based on dry weight for cap and stalk were determined, and the values found, for both total Cr and Cr VI , were always <1, although for hexavalent chromium, the BCFs were 10 times higher than for total chromium. KEYWORDS: Mushroom; soil; total Cr; Cr VI ; atomic absorption spectrometry INTRODUCTIONHeavy metals are considered to be among the most pollutant agents in all of the environmental compartments. In the soils, heavy metals are derived from natural components or geological sources, as well as from anthropogenic activities. Apart from the occupational exposure, the human exposure to toxic metals is mainly through the diet, and the vegetable fraction is an important contribution for metal intake.Mushrooms constitute part of the human diet because they provide carbohydrates, proteins, vitamins, and minerals (1). Moreover, mushroom...

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“…The Cd, Pb and Hg contents of twenty-four WEF species collected in primary forests of Latin America have been shown to be surprisingly similar to those found in fungi collected in polluted urban areas in Europe (Michelot et al 1999). These results suggest long-distance dry or wet deposition of heavy metals across the globe.…”

Section: Safety Concerns When Eating Wild Edible Fungimentioning

confidence: 59%

Wild-gathered fungi for health and rural livelihoods

2006

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Fungi are a good source of digestible proteins and fibre, are low in fat and energy and make a useful contribution to vitamin and mineral intake. In terms of current dietary advice, 80 g fungi represent one portion of vegetables. Dried fungi and concentrated extracts are also used as medicines and dietary supplements. Some species show strong anti-tumour and antioxidant activity by enhancing various immune system functions and lowering cholesterol levels. Nevertheless, there are also some safety concerns. Edible species might be mistaken for poisonous ones, high heavy-metal concentrations in wild edible fungi (WEF) are a known source of chronic poisoning and the consumption of WEF can contribute markedly to the radiocaesium intake of human subjects. Some regions of Europe have a strong WEF tradition, especially eastern Europe. In the UK the consumption of wild fungi is considered of minor importance. Only one-third of adults consume fungi (cultivated species and WEF) throughout the UK; the average intake of fungi in the UK is estimated to be 0 . 12 kg fresh weight per capita per year. At least eighty-two species of wild fungi are recorded as being consumed in the UK, although certain species (e.g. chanterelle (Cantharellus cibarius), cep (Boletus edulis), oyster mushroom (Pleurotus ostreatus)) are favoured over others. Although WEF are not essential components in the daily diet, they are a nutritionally-valuable addition to the range of vegetables consumed, and their role in helping to avert food shortages in less-favoured areas should be definitely considered.

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Metal Content Profiles in Mushrooms Collected in Primary Forests of Latin America

Cited by 16 publications

References 12 publications

Multi-element survey of wild edible fungi and blackberries in the UK

Multi-element survey of wild edible fungi and blackberries in the UK

Validation of an Electrothermal Atomization Atomic Absorption Spectrometry Method for Quantification of Total Chromium and Chromium(VI) in Wild Mushrooms and Underlying Soils

Wild-gathered fungi for health and rural livelihoods

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