The Induction of Secondary Toxic Substances and Antioxidative Enzymes by $SO_2$ Fumigation in Foliage Plants

관엽식물에서 $SO_2$ 처리에 의한 이차독성물질 생성 및 항산화효소의 유도

  • Lee, Young-Yi (Dept. of Environmental Horticulture, The Univ. of Seoul) ;
  • Kang, Youn-Ji (Dept. of Environmental Horticulture, The Univ. of Seoul) ;
  • Lee, Yong-Beom (Dept. of Environmental Horticulture, The Univ. of Seoul)
  • 이영이 (서울시립대학교 환경원예학과) ;
  • 강연지 (서울시립대학교 환경원예학과) ;
  • 이용범 (서울시립대학교 환경원예학과)
  • Published : 2001.03.30

Abstract

To study whether the secondary toxic substances such as ethylene and reactive oxygen species(ROS) are induced by air pollutants in foliage plants, $SO_2$ was fumigated to Pachira aquatica, Spathiphyllum patinii, and Hedera helix. $SO_2$ was controlled to $1\;{\mu}L/L$ and then fiumigated to plants for 2 days(8 hrs/day). It resulted in visible injury in P. aquatica and H. helix while no symptom appeared in S. patinii. Photosynthetic rate and water use efficiency were most remarkably reduced in P. aquatica compared to other two species whereas least in S. patinii. Two days after $SO_2$ fumigation, ethylene evolution was quantified to 23.56, 10.43 and 4.79 nL/g/h in P. aquatica, H. helix and S patinii, respectively. On the other hand, antioxidative enzymes were clearly activated by $SO_2$ treatment in all tested plant species implying ROS production. In conclusion, we could suggest that ethylene and ROS have been intimately related to the defense mechanism against $SO_2$ and their induction degree increased with plant susceptibility to $SO_2$. Furthermore, it was found that S. patinii was tolerant and P. aquatica sensitive to $SO_2$ on the basis of antioxidative enzyme activity and ethylene evolution.

Keywords

reactive oxygen species;ethylene