Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
권호 표지

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

자외선에 의한 벼 엽 세포 소기관의 형태적 변화

  • 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)
  • Received : 2003.11.12
  • Accepted : 2004.01.26
  • Published : 2004.02.29
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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.

자외선 처리에 의한 세포 내 소기관의 구조적 변화를 관찰하기 위하여 수행하였다. 광학현미경을 통한 인산기를 가진 광합성산물은 자외선 처리시간의 증가와 함께 급격히 감소하였다. 주사전자현미경을 통한 엽 표면의 큐티클층은 자외선 처리 6시간 이후부터 파괴되기 시작하였다. 자외선에 의한 세포 수분압의 변화는 엽록체의 틸라코이드막을 파괴하였으며, 표피세포의 두께를 증가시켰는데 특히 1차 세포벽은 파괴되었으며 2차 세포벽은 리그닌의 합성 및 축적으로 인해 무처리에 비해 약 2배정도 두꺼워졌다.

Keywords

References

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