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Effect of UV-B Radiation on the Leaf Growth of Rice Seedling  

Sung, Jwa-Kyung (Department of Agronomy, Chungbuk National University)
Lee, Su-Yeon (Department of Plant Resources Science, Hankyong National University)
Kim, Tae-Wan (Department of Plant Resources Science, Hankyong National University)
Hwang, Seon-Woong (Division of Plant Nutrition, NIAST, RDA)
Park, Moon-Hee (Division of Plant Nutrition, NIAST, RDA)
Song, Beom-Heon (Department of Agronomy, Chungbuk National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.37, no.1, 2004 , pp. 25-30 More about this Journal
Abstract
Rice seedlings were used to examine the effect of UV-B radiation on leaf elongation and development. Leaf elongation in both rice seedlings showed differently depending on each leaf age. UV-B radiation strongly reduced leaf elongation, 58-66% compared to without UV-B radiation, of two rice seedlings, therefore, those seedlings could not grow further. Both control and plants grown under UV-B regime showed a diurnial fluctuation in growth rate, showing maximum growth during the light period and minimum during the dark period. Leaf growth at the third leaf stage by UV-B treatment was considerably reduced by 1.7-fold than the control whereas at the fifth leaf stage was not changed. Hydrogen peroxide was considerably increased in the second phase of UV-B-induced response as catalase and peroxidase are deactivated with an increase of UV-B radiation.
Keywords
Hydrogen peroxide; Rice; Leaf growth rate; UV-B radiation;
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