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Antioxidants Stimulated by UV-B Radiation in Rice Seedling  

Sung, Jwa-Kyung (Department of Agronomy, Chungbuk National University)
Lee, Seung-Hwan (Department of Agronomy, Chungbuk National University)
Lee, Su-Yeon (Department of Plant Resources Science, Hankyong National University)
Shim, Myung-Bo (Institute of Ecological Phytochemistry, Hankyong National University)
Kim, Tae-Wan (Department of Plant Resources Science, Hankyong National University)
Song, Beom-Heon (Department of Agronomy, Chungbuk National University)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.49, no.2, 2004 , pp. 116-120 More about this Journal
Abstract
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.
Keywords
rice seedling; UV-B; phenolic compound; ascorbate; glutathione; lipid peroxidation;
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