ayoub Nalousi

MS
University of Guilan · Department of Horticultural Science

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    Article: Protective Role of Exogenous Nitric Oxide Against Oxidative Stress Induced by Salt Stress in Bell-Pepper (Capsicum annum L.)
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    ABSTRACT: The production of reactive oxygen species (ROS) increases under stress conditions and causes oxidative damage. In the present study, effects of exogenous sodium nitroprusside (SNP), a nitric oxide (NO) donor, alleviated the damage of salt stress, in during germination and seedling growth of bell-pepper (Capsicum annuum L.) was investigated. Bell-pepper’s seedlings were treated with 0, 25, 50, 75 mM SNP stimulated ROS-scavenging enzymes and reduced stress of bell- pepper leaves induced by 0, 4, 6 and 8 ms /cm3 NaCl. The presence of the nitric oxide donor increased the activities of superoxide dismutases (SOD) and peroxidises (POD). NaCl treatment induced significant stress and led to serious lipid peroxidation in bell- pepper leaves. However, NO treatment decreased lipid peroxidation content significantly under salt stress. The results showed, seed germination percent, germination rate decreased under salt stress. However, Seed germination is promoted at concentrations between 0.2 and 0.8 mM SNP. The promoting effect of NO on seed germination persisted even in the presence of salt stress. 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. Information from this study can be used to improve soil management practices for sustainable use of salt-affected soils in the future.
    American-Eurasian Journal of Agricultural and Environmental Sciences. 02/2013; 8(12):085-1090.

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