Document Type : Research Paper
Author
Abstract
salt stress has a an important role in deacreasing plant growth and development. Tocopherols, identified as vitamin E, are amphipathic molecules known as antioxidant and able to remove ROS in lipophilic conditions. In this study, tobacco plants were cultured on MS medium containig concentrations of 0, 100, 200 mM NaCl supplemented with 0, 100, 200 and 400 mg.L ˉ1 of α-tocopherol for 4 weeks. Then growth parameters including fresh and dry weight, photosynthetic pigments including chlorophyll a, b, total chlorophyll and carotenoids, sodium and potassium, proline, total phenol, soluble sugar, anthocyanins, total protein were measured. The results showed that increasing of α-tocopherol concentrations increased fresh and dry weight of plants and the amount of photosynthetic pigments , proline, soluble sugar, total phenol, anthocyanins and potassium while, amount of sodium was decreased significantly. Protein content increased by the highest concentration of α-tocopherol. It seemed that treatment with vitamin E by changing physiological parameters resulted increasing of salinity tolerance of tobacco.
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