title: Physiological effects of copper on some biochemical parameters in Zea mays L. seedlings.
abstract: Growth parameters and biochemical changes were studied in roots and leaves of 15 day old maize grown in a nutrient solution containing various copper concentrations (0, 25, 50, 75 and 100 microM). An accumulation of H2O2 was observed in roots and shoots. The leaf chlorophyll a, b and carotenoid contents decreased with increasing Cu concentration. The results demonstrated adverse effects of Cu on N metabolism and plant growth. Cu exposure elevated Cu concentration and decreased Nitrate Reductase (NR) activity in the roots and shoots. However, Cu exposure increased total free amino acid content in the leaves.
authors.affiliation: Urmia University, Iran.
authors.forename: Latifeh
authors.initials: L
authors.lastname: Pourakbar
authors.forename: Masoud
authors.initials: M
authors.lastname: Khayami
authors.forename: Jalil
authors.initials: J
authors.lastname: Khara
authors.forename: Tayabeh
authors.initials: T
authors.lastname: Farbodnia
mesh_terms: D002338:Carotenoids / Q000032:analysis; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D003300:Copper / Q000032:analysis / Q000737:chemistry; D004305:Dose-Response Relationship, Drug; D004583:Electrons; D050901:Nitrate Reductase / Q000378:metabolism; D010777:Photochemistry / Q000379:methods; D018517:Plant Roots / Q000378:metabolism; D018520:Plant Shoots / Q000378:metabolism; D012639:Seeds / Q000378:metabolism*; D013997:Time Factors; D003313:Zea mays
chemical_list: D002734:Chlorophyll; D002338:Carotenoids; C037184:chlorophyll b; D003300:Copper; D050901:Nitrate Reductase; D000077194:Chlorophyll A