Antioxidants Stimulated by UV-B Radiation in Rice Seedling
2004
Sung, J.K. (Chungbuk National University, Cheongju, Republic of Korea), E-mail: [email protected] | Lee, S.Y. (Hankyong National University, Anseong, Republic of Korea) | Lee, S.H. (Chungbuk National University, Cheongju, Republic of Korea) | Song, B.H. (Chungbuk National University, Cheongju, Republic of Korea) | Shim, M.B. (Hankyong National University, Anseong, Republic of Korea) | Kim, T.W. (Hankyong National University, Anseong, Republic of Korea)
In order to investigate low molecular antioxidants synthesized by enhanced UV-B radiation, we used the seedlings of two rice varieties. Woonjangbyeo, UV-tolerant, and Hwajoongbyeo, UV-susceptible, were subjected under supplemental UV-B irradiation. When rice seedlings were irradiated with UV light for short period, biosynthesis of total phenolic compound, ascorbate and glutathione were momently reduced. With an increase of UV-B radiation, however, those were slightly synthesized. The content of lipid peroxides in UV-challenged rice leaves was considerably increased after 12 hrs of UV-B treatment. Lipoxygenase activity under supplemental UV-B radiation was differently responded on rice varieties.
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