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Effect of Artificial Warming on Chlorophyll Contents and Net Photosynthetic Rate of Quercus variabilis Seedlings in an Open-field Experiment

실외 인위적 온난화 처리가 굴참나무 묘목의 엽록소 함량 및 순광합성률에 미치는 영향

  • Jo, Wooyong (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Son, Yowhan (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Chung, Haegeun (Department of Environmental Engineering, Konkuk University) ;
  • Noh, Nam Jin (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Yoon, Tae Kyung (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Han, Saerom (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Lee, Sun Jeoung (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Lee, Sue Kyoung (Forest Policy Division, Korea Forest Service) ;
  • Yi, Koong (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Jin, Lixia (Division of Environmental Science and Ecological Engineering, Korea University)
  • 조우용 (고려대학교 환경생태공학부) ;
  • 손요환 (고려대학교 환경생태공학부) ;
  • 정혜근 (건국대학교 환경공학과) ;
  • 노남진 (고려대학교 환경생태공학부) ;
  • 윤태경 (고려대학교 환경생태공학부) ;
  • 한새롬 (고려대학교 환경생태공학부) ;
  • 이선정 (고려대학교 환경생태공학부) ;
  • 이수경 (산림청 산림정책과) ;
  • 이궁 (고려대학교 환경생태공학부) ;
  • Received : 2011.09.26
  • Accepted : 2011.10.31
  • Published : 2011.12.31

Abstract

We investigated the effect of artificial warming on chlorophyll contents and net photosynthetic rates of 2-year-old Quercus variabilis seedlings in a nursery open-field experiment site. 64 seedlings were each planted in $1m{\times}1m$ plots (n = 4) and warmed with infrared lamps. The air temperature in warmed plots was $3^{\circ}C$ higher than that of control plots. Chlorophyll contents and net photosynthetic rates were measured in May, July, August, September and October, 2011. In May, September and October chlorophyll contents and net photosynthetic rates were significantly higher in warmed plots than in control plots. However, there were no significant differences in chlorophyll contents and net photosynthetic rates between warmed plots and control plots in July and August. It seemed that early developed leaves of warmed plots in May with higher chlorophyll contents could lead to higher net photosynthetic rates whereas there was no difference in net photosynthetic rates due to saturation of chlorophyll contents in July and August. Increased biosynthesis of chlorophyll due to warming might increase net photosynthetic rates in September and October.

실외 인위적 온난화 처리가 2년생 굴참나무(Quercus variabilis) 묘목의 엽록소 함량 및 순광합성률에 미치는 영향을 연구하였다. 4개씩의 $1m{\times}1m$ 크기 처리구와 대조구에 굴참나무 묘목 64본을 식재하고, 적외선등을 이용하여 처리구의 대기온도를 대조구보다 $3^{\circ}C$ 높였다. 엽록소 함량 및 순광합성률을 2011년 5월, 7월, 8월, 9월, 10월에 각각 측정하였는데, 5월, 9월, 10월에는 처리구에서 대조구보다 높은 경향을 보였으며, 7월과 8월에는 처리구와 대조구 간에 차이가 없었다. 5월에는 처리구에서 일찍 발달한 잎의 엽록소 함량이 높아 순광합성률이 증가된 것으로 보이며, 7월과 8월에는 엽록소 함량의 포화로 인해 순광합성률이 대조구와 유의적인 차이를 나타내지 않은 것으로 보인다. 그러나 9월과 10월은 온난화 처리에 의해 엽록소 합성이 촉진되고 이로 인하여 순광합성률이 증가된 것으로 판단된다.

Keywords

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