Institute of Biological and Health Sciences,Federal University of Vicosa (UFV),Campus Florestal, Minas Gerais, Brazil;
Federal University of Western Para (UFOPA),University Campus of Juruti,Para, Brazil;
Postgradute Program in Management and Conservation of Natural and Agrarian Ecosystems,UFV Campus Florestal, Florestal, Minas Gerais, Brazil;
Paspalum densum; Echinochloa crus-galli; Apoplastic barrier; Iron toxicity;