Change of Photosynthesis and Cellular Tissue under High CO$_{2}$ Concentration and High Temperature in Radish

고농도 CO$_{2}$와 고온조건에서 무의 광합성 및 세포조직 변화

Lee, Sang-Gyu;Moon, Ji-Hye;Jang, Yoon-Ah;Kim, Seung-Yu;Ko, Kwan-Dal
이상규;문지혜;장윤아;김승유;고관달

  • Published : 2009.06.30

Abstract

This experiment was carried out to figure out the changes of photosynthesis and cellular tissue of radish grown under the condition of high temperature and high CO$_{2}$ concentration to provide the information regarding the coming climatic change. Radish was cultivated in spring season under 4 treatments, 'ambient temp. + ambient CO$_{2}$ conc. (control)', 'ambient temp. + elevated CO$_{2}$ conc. (elevated CO$_{2}$)', 'elevated temp. + ambient CO$_{2}$ conc. (elevated temp.)', 'elevated temp. + elevated CO$_{2}$ conc. (elevated temp.+CO$_{2}$)'. The elevated temperature plot was maintained at 4${^{\circ}C}$ higher than atmospheric air temperature, and the elevated CO$_{2}$ concentration plot was maintained at 650 mg.L$^{-1}$ CO$_{2}$. The fresh weight of root, photosynthesis ability and starch contents were increased at the 'elevated CO$_{2}$' treatment. Also, the cellular tissue was tight and close at 'elevated CO$_{2}$' treatment. However, elevated temperature conditions worsened results in growth, photosynthesis ability, and starch content.

본 연구는 무의 재배시 기후변화에 대비하여 고온과 고농도의 이산화탄소 조건에서 생육반응과 세포조직의 변화를 알아보고자 수행하였다. 처리는 '대기중 온도+대기중 CO$_{2}$ 농도(Control)', '대기중 온도+대기보다 CO$_{2}$ 2배 상승(Elevated CO$_{2}$)', '대기온도보다 4${^{\circ}C}$상승+대기중 CO$_{2}$ 농도(Elevated Temp.)', '대기온도보다 4${^{\circ}C}$상승+대기보다 CO$_{2}$ 2배 상승(Elevated Temp.+CO$_{2}$)' 등의 4가지 조건으로 처리하였다. 그 결과, 대기조건보다 CO$_{2}$ 농도를 2배정도 높여주면 뿌리의 비대발육이 커지고, 광합성능력이 좋아지며 과육부위에 전분함량이 증가하였고, 온도와 CO$_{2}$ 농도를 동시에 높여주면 대기조건보다 생육이 저하되지 않았으며 세포 크기가 커지고, 울타리조직이 두꺼워지는 것으로 나타났다. 그러나 온도만 높아지면 뿌리의 발육이 현저하게 낮아지고, 광합성능력도 저하되며 온도가 높기 때문에 전분의 소모가 많아져 과육내 전분함량이 낮아지는 것으로 나타났다.

Keywords

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