한국농림기상학회지, 제 13권 제3호(2011) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 13, No. 3, (2011), pp. 115~122
DOI: 10.5532/KJAFM.2011.13.3.115
ⓒ Author(s) 2014. CC Attribution 3.0 License.


온도와 CO2 농도 증가에 따른 다릅나무와 백당나무의 생장,
광합성 및 광색소 함량 변화

한심희, 김두현, 김길남, 이재천
국립산림과학원 산림유전자원부

(2011년 08월 15일 접수; 2011년 09월 14일 수정; 2011년 09월 20일 수락)

Changes on Growth, Photosynthesis and Pigment contents of the
Maackia amurensis and Viburnum opulus var. calvescens
under Enhanced Temperature and CO2 Concentration

Sim-Hee Han, Du-Hyun Kim, Gil Nam Kim, Jae-Cheon Lee
Department of Forest Genetic Resources, Korea Forest Research Institute, Suwon 441-847, Korea

(Received August 15, 2011; Revised September 14, 2011; Accepted September 20, 2011)

ABSTRACT
The impacts of elevated temperature and CO2 were studied on the seedlings of Maackia amurensis and Viburnum opulus var. calvescens. The seedlings were grown in controlled-environment growth chambers with four combinations of temperature and CO2 treatments: 25oC + ambient CO2 (400 ppm), 25oC + elevated CO2 (800 ppm), 30oC + ambient CO2 (400 ppm), and 30oC + elevated CO2 (800 ppm). Under elevated temperature and CO2 concentration, the dry weight decreased in seedlings of M. amurensis, but increased in seedlings of V. opulus var. calvescens. In addition, the shoot to root (S/R) ratio in M. amurensis reduced but that of V. opulus var. calvescens increased under elevated CO2 concentration. The S/R ratios of two tree species increased under higher temperature. M. amurensis represented lower carboxylation efficiency under higher temperature and CO2 concentration and that of V. opulus var. calvescens showed lower values under the only higher temperature. Photosynthetic pigment content of in the leaves of M. amurensis was lower under higher CO2 concentration and higher under the increase of temperature, but that of V. V. opulus var. calvescens decreased according to the increase of temperature. Chlorophyll a/b ratios of M. amurensis and V. V. opulus var. calvescens decreased obviously with the increase of CO2 concentration and temperature, respectively. In conclusion, the growth and physiological responses under the environmental changes such as temperature and CO2 concentration depend on the tree species. Therefore, more studies are needed to predict the response of each tree species against the climate changes.

Keyword: Maackia amurensis, Viburnum opulus var. calvescens, Elevated temperature, CO2 Concentration, growth, Photosynthesis

MAIN

적요

본 연구는 최근 전 지구적으로 문제시 되고 있는 기후변화와 관련하여, 우리나라에서의 대기 중 CO2 농도 증가와 평균 온도 상승에 따른 수목의 생장 및 생리 반응의 변화를 예측하고자 실시되었다. 온도와 CO2 농도 증가 하에서 다릅나무의 건중량은 감소하였으나, 백당나무의 건중량은 증가하였다. 또한, CO2 농도 증가는 다릅나무의 지상부와 지하부의 비(S/R)를 감소시킨 반면, 백당나무의 지상부와 지하부의 비는 증가시켜, 두 수종의 생장 반응은 서로 상반되는 결과를 나타냈다. 그러나 두 수종 모두 온도 증가에 의해 S/R율이 증가하였다. 탄소고정효율은 다릅나무의 경우, 온도와 CO2 농도 증가에 의해 뚜렷하게 감소하였으나, 백당나무는 온도 증가로 탄소고정효율이 감소한 반면, CO2 증가는 뚜렷한 효과를 나타내지 않았다. 광색소 함량은 다릅나무의 경우, CO2 농도가 증가하면서 모든 광색소 함량이 감소하였다. 그러나 백당나무에서는 뚜렷한 변화가 없었다. 한편 온도 증가는 다릅나무의 잎내 광색소 함량을 크게 증가 시켰으나, 백당나무는 반대로 광색소 함량이 모두 감소하였다. 다릅나무의 엽록소 a/b 비는 CO2 농도 증가로 뚜렷하게 감소하였으며, 백당나무는 온도 증가로 엽록소 a/b 비가 감소하였다. 결론적으로 온도와 CO2 농도 변화에 따른 수목의 생장 및 생리적 반응은 처리 농도 또는 기간에 따라 큰 차이를 나타내며, 공시재료의 연령에도 큰 영향을 받는다. 본 연구는 1년생의 어린 묘목을 대상으로 단기간 온도와 CO2 농도 변화에 대한 반응을 분석한 것이므로, 장기적인 환경 변화에 대한 수목의 적응 특성은 예측하기 어렵다. 따라서 미래의 기후변화에 대한 수목의 반응을 정확한 예측을 위해서는 장기적인 환경 변화 조건하에서 다각적인 연구가 이루어져야 한다. 또한 환경 변화에 따른 반응은 수종에 따라 큰 차이를 나타내므로, 기후변화에 따른 수목의 반응을 예측하기 위해서는 우리나라 주요 수종 및 기후변화에 민감한 수종들을 대상으로 지속적인 연구가 이루어져야 한다.

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