Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Changes in Chlorophyll Content and Leaf Damages of Liliodendron tulipifera L. Seedlings Treated with Simulated Acid Rain

인공산성비 처리에 의한 백합나무 묘목의 엽피해와 엽록소함량 변화

  • Yoon, Jun-Hyuck (Department of Forest Resources, Yeungnam University) ;
  • Lee, Do-Hyung (Department of Forest Resources, Yeungnam University) ;
  • Woo, Kwan-Soo (Department of Forest Genetic Resources, Korea Forest Research Institute)
  • 윤준혁 (영남대학교 산림자원학과) ;
  • 이도형 (영남대학교 산림자원학과) ;
  • 우관수 (국립산림과학원 산림유전자원부)
  • Published : 2008.09.30
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Abstract

This study was conducted to analyze the influence of simulated acid rain on leaves of Liliodendron tulipifera seedlings. The seedlings were treated with four levels of simulated acid rain with pH of 5.6, 4.9, 3.9 and 2.9, and then chlorophyll contents and the degree of foliar damage were investigated. Differences were statistically significant among treatments in chlorophyll contents in all of the tested soils. The total contents of chlorophyll tended to decrease as the simulated acid rain treatment was maintained. Chlorophyll contents, however, did not decrease according to the decrement of pH levels. Foliar damage increased as the simulated acid rain was maintained in all tested soils. Especially, the damage dramatically increased between May and July as the acidity increased. As the treatment of simulated acid rain continued, deformed new leaves appeared. In all treatments except the control, the leaves turned brown and the damage increased with time. Necrotic spots appeared during the first month of treatment at the pH level of 2.9 in all soil types. The damage by acid rain should be considered when we plant Liliodendron tulipifera.

인공산성비 처리가 백합나무 묘목의 잎에 미치는 영향을 분석하기 위하여 인공적으로 pH 5.6, 4.9, 3.9, 2.9로 구분된 산성비를 일정기간 처리하여 엽록소 함량, 엽피해율 및 가시적 피해증상을 조사한 결과, 엽록소 함량의 경우, pH 수준 간 통계적으로 유의미한 차이가 나타났으나 pH 수준별 순차적 감소는 나타나지 않았고 인공산성비 처리가 지속됨에 따른 엽록소함량의 감소를 보였다. 또한, 엽록소 함량은 세 가지 토양에서 모두 pH 2.9처리구에서 가장 큰 폭으로 감소하였다. 엽피해율은 인공산성비 처리 초기시점에 급격한 피해를 보이다가 지속적으로 피해가 나타났다. 또한, pH 수준이 낮아짐으로써 엽피해율도 차이를 나타내었으며, 가시적 피해증상으로는 기형잎, 갈변현상, 괴사반점 형태로 나타났다. 본 연구의 결과를 전반적으로 고려할 때, 인공산성비 처리는 백합나무 묘목의 잎에서 일어나는 광합성작용 및 물리적 피해를 준 것으로 나타났다. 따라서 최근 가로수 및 용재수로 보급 중에 있는 백합나무에 대하여 산성비에 의해 예상되는 내외부 생리적 반응 및 생장에 미치는 영향 등에 관한 체계적이고 부가적인 연구가 요구된다.

Keywords

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