Forest Science and Technology

Korean Society of Forest Science (한국산림과학회)
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Physiological and biochemical responses of elevated ozone on Pterocarpus indicus under well-watered and drought conditions

  • Baek, Saeng Geul (Seed Viability Research Team, Baekdudaegan National Arboretum) ;
  • Park, Jeong ho (Department of Environmental Horticulture, University of Seoul) ;
  • Kwak, Myeong Ja (Department of Environmental Horticulture, University of Seoul) ;
  • Lee, Jong Kyu (Department of Environmental Horticulture, University of Seoul) ;
  • Na, Chae Sun (Seed Viability Research Team, Baekdudaegan National Arboretum) ;
  • Lee, Byulhana (Seed Viability Research Team, Baekdudaegan National Arboretum) ;
  • Woo, Su Young (Department of Environmental Horticulture, University of Seoul)
  • Received : 2018.01.11
  • Accepted : 2018.06.12
  • Published : 2018.12.31
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Abstract

Seedlings of Pterocarpus indicus were grown in both well-watered and drought stress conditions in phytotron. Seedlings grown under well-watered and drought stress conditions were exposed to either combined or without ozone of 200 ppb for one month. First, the physiological responses to elevated ozone levels indicated a decreased biomass. The seedlings grown in arid soil and exposed to ozone showed less biomass than those grown in arid soil but not exposed to ozone. Moreover, all the seedlings except the well-watered and unexposed ones showed a significantly lower photosynthetic rate ($P_N$) over time. However, with the accumulation of ozone injuries, the antioxidant enzyme activities increased overall. In the study results, when exposed to ozone, the well-watered seedlings exhibited more antioxidative enzyme activity than did the seedlings grown in arid soil. Generally, P. indicus in arid soil suffered less damage from elevated ozone than did the well-watered plants.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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