title: Hydrogen peroxide pre-treatment induces salt-stress acclimation in maize plants.
abstract: The effect of exogenously applied H2O2 on salt stress acclimation was studied with regard to plant growth, lipid peroxidation, and activity of antioxidative enzymes in leaves and roots of a salt-sensitive maize genotype. Pre-treatment by addition of 1 microM H2O2 to the hydroponic solution for 2 days induced an increase in salt tolerance during subsequent exposure to salt stress. This was evidenced by plant growth, lipid peroxidation and antioxidative enzymes measurements. In both leaves and roots the variations in lipid peroxidation and antioxidative enzymes (superoxide dismutase, ascorbate peroxidase, guaiacol peroxidase, glutathione reductase, and catalase) activities of both acclimated and unacclimated plants, suggest that differences in the antioxidative enzyme activities may, at least in part, explain the increased tolerance of acclimated plants to salt stress, and that H2O2 metabolism is involved as signal in the processes of maize salt acclimation.
authors.affiliation: Departamento de Biologia, Universidade Federal Rural de Pernambuco, Recife, Pernambuco, Brazil.
authors.forename: André Dias
authors.initials: AD
authors.lastname: de Azevedo Neto
authors.forename: José Tarquinio
authors.initials: JT
authors.lastname: Prisco
authors.forename: Joaquim
authors.initials: J
authors.lastname: Enéas-Filho
authors.forename: Jand-Venes Rolim
authors.initials: JV
authors.lastname: Medeiros
authors.forename: Enéas
authors.initials: E
authors.lastname: Gomes-Filho
mesh_terms: D000222:Adaptation, Physiological / Q000187:drug effects*; D060387:Ascorbate Peroxidases; D002374:Catalase / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D005980:Glutathione Reductase / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D015227:Lipid Peroxidation; D010544:Peroxidases / Q000378:metabolism; D012965:Sodium Chloride; D013482:Superoxide Dismutase / Q000378:metabolism; D003313:Zea mays / Q000187:drug effects* / Q000201:enzymology / Q000502:physiology
chemical_list: D012965:Sodium Chloride; D006861:Hydrogen Peroxide; D010544:Peroxidases; D060387:Ascorbate Peroxidases; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005980:Glutathione Reductase