Alleviation of Cu toxicity in Oenothera picensis by copper-adapted arbuscular mycorrhizal fungi and treated agrowaste residue

► Sugar beet agrowaste application increase Oenothera picensis biomass by 2-8-fold. ► Only Cu-adapted mycorrhizal fungi allow Oenother picensis survival at high Cu-levels. ► Mycorrhized plants by Cu-adapted fungi show a decrease in the oxidative stress. ► Cu-adapted fungi increase the O. picensis colonization at increasing Cu-levels.