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Research Journal of Environmental Sciences

Year: 2014  |  Volume: 8  |  Issue: 1  |  Page No.: 49 - 56

Effect of Salicylic Acid on Oxidative Stress Caused by NaCl Salinity in Lycopersicum Esculentum Mill

Zahra Shahba, Amin Baghizadeh, Mehdi Yousefi and Mandana Ohadi

Abstract

Of the effects of salinity stress is the production of Reactive Oxygen Species (ROS) and creation of oxidative stress, where ROS rapidly attack all kinds of biomolecules such as nucleic acids, proteins, lipids and amino acids and lead to abnormal metabolic function. Salicylic acid reduces the effects of oxidative stress. In this research, first, seeds were cultured in the pots containing perlite and then they were put in a growth room under controlled conditions at 27±2 and 23±2°C in light (16 h) and dark (8 h) conditions, respectively with luminous intensity of 15 klx and moisture of 75%. Five concentrations of NaCl including 0, 25, 50, 75 and 100 nM and 4 concentrations of salicylic acid including 0, 1.5 and 1.5 mM were used. Then, peroxidation rates of lipids, ascorbic acid and dehydroascorbic acids were measured to study the effects of oxidative stress. High salinity significantly increased malondealdehyde rate. At different salinity levels, a decrease in other aldehydes was found and salicylic acid decreased its effect in most treatments. Content of ascorbic and dehydroascorbic acids increased by salinity and its salicylic acid was reduced.

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