title: Tolerance to iron accumulation and its effects on mineral composition and growth of two grass species.
abstract: This study aimed to assess the influence of excess iron on the capacity of accumulation of this heavy metal, mineral composition, and growth of Setaria parviflora and Paspalum urvillei. Seedlings were submitted to 0.009; 1; 2; 4; and 7 mM of Fe-EDTA. In both species there was an increase in the concentration of Fe, Zn, P, and Ca and a decrease in Mn, K, and Mg in the iron plaque. Both species accumulated more iron in roots. In the shoots, S. parviflora showed higher iron content, except at 7 mM. Iron altered the contents of Fe, Cu, K, and Mg in roots, and of Fe, Mn, Zn, N, P, K, Ca, and Mg in shoots. The two species tolerated high iron concentrations and accumulated high content of this element in both shoots and roots. The iron did not reduce their growth. Both species are indicated for studies aiming restoration of iron-contaminated areas.
authors.affiliation: Universidade Federal de Viçosa (UFV), 36570-000, Viçosa, Minas Gerais, Brazil.
authors.forename: Talita Oliveira
authors.initials: TO
authors.lastname: de Araújo
authors.forename: Larisse
authors.initials: L
authors.lastname: de Freitas-Silva
authors.forename: Brenda Vila Nova
authors.initials: BV
authors.lastname: Santana
authors.forename: Kacilda Naomi
authors.initials: KN
authors.lastname: Kuki
authors.forename: Eduardo Gusmão
authors.initials: EG
authors.lastname: Pereira
authors.forename: Aristéa Alves
authors.initials: AA
authors.lastname: Azevedo
authors.forename: Luzimar Campos
authors.initials: LC
authors.lastname: da Silva
mesh_terms: D004361:Drug Tolerance; D007501:Iron / Q000378:metabolism / Q000633:toxicity*; D008670:Metals / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D031781:Paspalum / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D036226:Seedlings / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D032983:Setaria Plant / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism
chemical_list: D008670:Metals; D010758:Phosphorus; D007501:Iron; D009584:Nitrogen