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Boletus edulis
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===Heavy-metal contamination=== ''Boletus edulis'' is known to be able to tolerate and even thrive on soil that is contaminated with toxic heavy metals, such as soil that might be found near [[smelting|metal smelters]]. The mushroom's resistance to heavy-[[metal toxicity]] is conferred by a biochemical called a [[phytochelatin]]βan [[oligopeptide]] whose production is induced after exposure to metal.<ref>{{cite journal |vauthors=Collin-Hansen C, Pedersen SA, Andersen RA, Steinnes E |year=2007 |title=First report of phytochelatins in a mushroom: induction of phytochelatins by metal exposure in ''Boletus edulis'' |journal=Mycologia |volume=99 |issue=2 |pages=161β74|doi=10.3852/mycologia.99.2.161 |pmid=17682769}}</ref> Phytochelatins are [[chelation|chelating agents]], capable of forming [[coordination complex|multiple bonds]] with the metal; in this state, the metal cannot normally react with other elements or ions and is stored in a detoxified form in the mushroom tissue.{{Cn|date=December 2024}}
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