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Morphological Alteration of Cell Organelles Affected by UV-B Radiation in Rice Leaf Tissues  

Sung, Jwa-Kyung (Department of Agronomy, Chungbuk National University)
Song, Beom-Heon (Department of Agronomy, Chungbuk National University)
Kim, Hong-Sig (Department of Agronomy, Chungbuk National University)
Lee, Chul-Won (Department of Agronomy, Chungbuk National University)
Kim, Tae-Wan (Department of Plant Resources Science, Hankyong National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.37, no.1, 2004 , pp. 31-35 More about this Journal
Abstract
This experiment was performed to observe morphological changes in rice leaf tissue caused by a successive UV-B radiation. Effect of UV-B radiation on the structural alteration of tissue was not visually found, however, Photosynthate containing phosphate was sharply reduced in proportion with an increase of UV-B radiation. Fundamental components of cuticle layer were being degraded after 6 h of UV-B radiation compared to the control. UV-B-induced mesophyll cell appeared altered because of water stress, the shape of chloroplast appeared to be considerably shrunk and chloroplast thylakoid membranes were severely destructed. Primary cell wall of UV-B-stressed tissue was entirely scattered or disappeared, and the secondary cell wall due to lignin synthesis and deposition resulted in being thickened, almost 2-times, compared with the control.
Keywords
Cell wall; Chloroplast; Rice; UV-B radiation;
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