Metallothionein production is a common tolerance mechanism in four species growing in polluted Cu mining areas in Peru - Llerena, Juan Pablo Portilla; Coasaca, Raúl Lima; Rodriguez, Herbert Omar Lazo; Llerena, Sofía Ángela Portilla; Valencia, Ysabel Diaz; Mazzafera, Paulo (Ecotoxicology and Environmental Safety, 2021)