Gamma rays are belonging to ionizing radiation and interact with atoms or molecules to produce free radicals in cells. These radicals can damage or modify important components of plant cells and affect different morphology, anatomy, biochemistry and physiological characters in plants, mainly depending on the level of irradiation. These effects could changes in plant, the cellular structure and metabolism, like dilation of thylakoid membranes, alteration in photosynthesis, modulation of the antioxidative and accumulation of phenolic compounds (15 and 31).