title: Protective role of exogenous nitric oxide against oxidative-stress induced by salt stress in barley (Hordeum vulgare).
abstract: To probe into the potential of relieving the oxidative damage of salt stress, we investigated the protective role of nitric oxide on barley under salt stress. Salt stress resulted in increased ion leakage, lipid peroxidation and protein oxidation in barley leaves. Simultaneous treatments of barley leaves with 50 microM sodium nitroprusside, a nitric oxide donor, alleviated the damage of salt stress, reflected by decreased ion leakage, and malendialdehyde (MDA), carbonyl, and hydrogen peroxide content in barley leaves. The presence of the nitric oxide donor increased the activities of superoxide dismutases (SOD), ascorbate peroxidases (APX), and catalases (CAT). Meantime, sodium nitroprusside addition increased accumulation of ferritin at the protein level, indicating that nitric oxide directly regulated ferritin accumulation. These results suggested that nitric oxide can effectively protect seedlings from salt stress damage by enhancing activities of antioxidant enzymes to quench the excessive reactive oxygen species caused by salt stress and inducing the increase of ferritin accumulation to chelate larger number of ferrous ion. Information from this study can be used to improve soil management practices for sustainable use of salt-affected soils in the future.
authors.affiliation: School of Life Science and Technology, Shanxi University, Taiyuan 030006, China.
authors.forename: Qiao-Yun
authors.initials: QY
authors.lastname: Li
authors.forename: Hong-Bin
authors.initials: HB
authors.lastname: Niu
authors.forename: Jun
authors.initials: J
authors.lastname: Yin
authors.forename: Meng-Ben
authors.initials: MB
authors.lastname: Wang
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Shao
authors.forename: De-Zhi
authors.initials: DZ
authors.lastname: Deng
authors.forename: Xiao-Xia
authors.initials: XX
authors.lastname: Chen
authors.forename: Jiang-Ping
authors.initials: JP
authors.lastname: Ren
authors.forename: Yong-Chun
authors.initials: YC
authors.lastname: Li
mesh_terms: D004591:Electrophoresis, Polyacrylamide Gel; D001467:Hordeum / Q000502:physiology*; D009569:Nitric Oxide / Q000494:pharmacology*; D018384:Oxidative Stress / Q000187:drug effects*; D012965:Sodium Chloride; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D009569:Nitric Oxide; D012965:Sodium Chloride