Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effect of UV-B Radiation on the Leaf Growth of Rice Seedling

벼 유묘의 엽생장에 대한 자외선의 효과

  • Received : 2003.11.12
  • Accepted : 2004.02.02
  • Published : 2004.02.29
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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.

본 연구는 벼 유묘기 자외선 처리에 의한 엽 신장과 출현양상의 변화를 알아보고자 수행하였다. 벼 유묘의 엽신장은 엽령에 따라 다르게 나타났다. 자외선 조사는 무처리와 비교할 때 58-66%의 엽 신장을 감소시켰다. 자외선 처리 또는 무처리 조건하에서의 엽 생장은 주로 주간에 이루어지는 졌다. 자외선에 의한 3엽의 생장은 무처리에 비해 1.7배정도 억제되었으나, 5엽 생장은 큰 차이가 없었다. 또한 스트레스에 의한 식물체내 지질과산화는 catalase와 peroxidase 활성저하로 인하여 증가하였다. 이상의 결과로 지속적인 자외선 노출은 엽 생장을 억제였으며 유묘기에 영향이 더 컸다.

Keywords

References

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