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KMID : 0903520080510020148
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2008 Volume.51 No. 2 p.148 ~ p.152
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Changes in the Seed Viability and DPPH-radical Scavenging of Helianthus annuus. Seeds According to Low Dose γ-ray irradiation
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Kim Sun-Il
Lee Hyun-Hwa
Kim Chun-Sung
Seo Myung-Deok
Lee Sook-Young
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Abstract
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This study was to elucidate the effect of low dose gamma (γ)-ray irradiation on the germination, seedling growth and antioxidant activity in sunflower seeds. The seed germination was stimulated in the range of 2.7~8.0% by low dose γ-ray irradiation compared with that of the control; however, the germination of seeds stored for 4 months after irradiated was decreased at all low dose γ-ray irradiation groups. Especially, the germination rate of 32 Gy-irradiated seed group was much lower than that of the other groups and 8 Gy was the optimal radiation dose for germination at room temperature. Though there was variation with storage time and temperature, seedling growth stored at 10oC for 4 months after irradiated was promoted at the 1 Gy γ-ray irradiation group compared to seed stored at 25oC. For the antioxidant activity of γ-ray irradiated seeds extract, 4 Gy and 32 Gy groups were significantly increased by 68.83% and 95.44%, respectively, compared to control at the concentration of 100 μg/ml.
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KEYWORD
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Helianthus annus, γ-ray irradiation, seed viability, antioxidant, DPPH radical
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