Korean Journal of Weed Science (한국잡초학회지)

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Effect of Simulated Acid Rain on Fatty Acid Composition and Antioxidant System in Garden Balsam(Impatiens balsamina L.)

인공산성비가 봉선화(Impatiens balsamina L.)의 지방산 구성 및 항산화 작용에 미치는 영향

  • Kim, Hak-Yoon (Department of Global Environment, Keimyung University)
  • Received : 2011.06.08
  • Accepted : 2011.06.20
  • Published : 2011.06.30
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Abstract

The effects of simulated acid rain (SAR) on fatty acid composition and biochemical defense responses of plant was investigated. Garden balsam (Impatiens balsamina L.) was exposed to four pH levels (5.6, 4.0, 3.0, 2.0) of SAR and placed in the growth chambers for 2 weeks. SAR drastically inhibited chlorophyll content of garden balsam. The level of $H_2O_2$ was significantly increased by SAR. As pH levels decreased from 5.6 to 2.0, the ratio of unsaturated to saturated fatty acids of garden balsam was increased. Changes of three major polyamines (putrescine, spermidine and spermine) of garden balsam leaves were observed. All of the polyamine contents were increased with SAR. Catalase activities of the plant affected by SAR were increased as the pH decreased. The results indicate that the application of SAR generates oxidative stresses from the garden balsam and retards the plant growth significantly. A biochemical protect mechanism might be activated to neutralize the oxidative stresses generated through SAR.

산성비에 대한 봉선화의 피해양상과 지질조성 변화 및 방어기작 등을 조사하기 위하여 2주 동안 여러 농도(pH 2.0, 3.0, 4.0, 5.6)의 인공산성비 실험을 수행하였다. 인공산성비의 pH가 낮을수록 생육피해가 심하게 나타났다. 인공산성비의 pH가 낮을수록 엽록소 함량은 감소하였으며 $H_2O_2$ 함량은 증가하였다. 인지질과 당지질 모두 인공산성비에 의해 포화지방산이 증가하고 불포화지방산이 감소하는 것으로 나타났다. 봉선화에는 주로 3종류의 polyaimne이 존재하며 이들 모두 인공산성비의 pH가 낮을수록 증가하는 것으로 나타났다. Catalase의 활성도 인공산성비의 pH가 낮을수록 증가하였다. 이상의 결과를 종합해 볼 때, 인공산성비에 의해 활성산소 생성되고, 지방산의 변화를 일어나며, polyamine 증가와 catalase 활성 증가는 산성비의 피해를 최소화하기 위한 방어기작이 작용한 것으로 사료된다.

Keywords

References

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