Comparing of Clonal Sensitivity of Populus deltoides to Atmospheric Ozone with Use of Visible Foliar Injury

잎의 가시적(可視的) 피해(被害)에 따른 오존에 대(對)한 미류나무(Populus deltoides) 클론간(間) 감수성(感受性) 비교(比較)

  • Lee, Jae-Cheon (Department of Tree Breeding, Korea Forest Research Institute) ;
  • Kim, In-Sik (Department of Tree Breeding, Korea Forest Research Institute) ;
  • Yeo, Jin-Kie (Department of Tree Breeding, Korea Forest Research Institute) ;
  • Koo, Yeong-Bon (Department of Tree Breeding, Korea Forest Research Institute)
  • Received : 2000.08.03
  • Accepted : 2001.02.09
  • Published : 2001.03.31

Abstract

Experiments were conducted to compare ozone sensitivity among clones. Ten clones of Papulus deltoides Marsh. were exposured in walk-in type chambers to charcoal-filtered air, 50ppb, 100ppb, and 150ppb ozone for 8h $day^{-1}$ for 21 consecutive days. Occurrence of premature leaf-fall, and visible foliar injury expressed as adaxial stipple were measured after termination of ozone exposure for 3 weeks. Rate of premature leaf-fall increased progressively according to ozone exposure levels. As a result, rate of premature leaf-fall was estimated over 50% at 150ppb ozone. In the charcoal-filtered air and 50ppb ozone treatments, visible foliar injury was not found. But injury was estimated as LA; 17.3%, AA; 6.5%, and LAA; 1.6% to 100ppb ozone treatment and LA; 34.1%, AA; 17.5%, and LAA; 7.4% to 150ppb ozone treatment. Clonal differences of sensitivity within the species were manifested by significant clone differences of adaxial stipple(LAA) in 100ppb and 150ppb ozone treatments.

오존 환경에 클론간 감수성을 비교하기 위하여 미류나무(Populus deltoides Marsh.) 10클론을 walk-in type인 4개의 chamber에 대조구, 50ppb, 100ppb, 150ppb 등 4가지 처리로 하루 8시간씩 21일간 계속하여 노출한 후 조기 낙엽율과 잎의 가시적 피해율을 조사하였다. 조기 낙엽율은 처리전과 비교할 때 저농도에서 고농도 순으로 처리농도에 따라 점진적으로 증가하여 150ppb 처리구에서는 50% 이상의 높은 낙엽율을 보였다. 잎의 가시적 피해는 대조구와 50ppb 처리구에서는 나타나지 않았으나, 100ppb 처리구에서는 피해잎 출현율(LA)은 17.3%, 피해면적(AA)은 6.5%로 본당 전체 피해율(LAA)은 1.6%로 나타났고, l50ppb 처리구에서는 피해잎 출현율 34.1%, 피해면적 17.5%로 전체 피해율 7.4%를 보였다. 잎의 가시적인 피해현상이 나타난 100ppb와 150ppb 처리구에서는 클론간에 피해의 차이를 보여 수종내 클론간의 감수성 차이를 확인할 수 있었다.

Keywords