Korean Journal of Agricultural and Forest Meteorology, Vol. 6, No. 1, (2004), pp. 11~17
ⓒ Author(s) 2014. CC Attribution 3.0 License.
(2003년 12월 10일 접수; 2004년 02월 13일 수락)
Exposed to Ozone
(2)The Research Institute of Basic Sciences, Seoul National University, Seoul 151-742, Korea
(Received December 10, 2003; Accepted February 13, 2004)
본 연구는 오존에 노출된 자작나무류의 기공 반응, 광합성 및 내부 CO2 농도 변화간의 연관성을 밝히고자 수행하였다. 거제수나무, 물박달나무, 박달나무, 자작나무, 사스래나무는 온실에서 양묘하여 포트로 옮겨 심고, 100ppb의 오존 농도에서 하루 8시간썩 5주 동안 오존에 노출시켰다. 순광합성은 오존 노출 초기부터 수종간, 처리간 차이가 있었으나, 기공전도도와 증산량은 오존 처리 3주 후부터 수종간, 처리간 차이가 있었다. 내부 CO2 농도는 수종간 차이가 없었으나, 처리간 차이는 크게 나타났으며, 물박달나무를 제외한 4개 수종의 내부 CO2 농도는 오존 처리구가 대조구보다 높았다. 탄소고정효율과 광호흡속도는 수종간 또는 처리간에 큰 차이를 나타냈으며, 모든 수종에서 대조구보다 오존 처리구가 낮았다. 자작나무류는 장기적인 오존 노출로 광합성과 관련된 rubisco 활성이 감소하여, 내부 CO2 농도가 증가하면서 기공이 닫히는 것으로 판단된다.
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