Chamaecyparis obtusa is one of the economical conifers planted in Korea due to its good quality timber and wood characteristics. Individuals of C. obtusa containing high terpenes (HT) and low terpenes (LT) were selected for by colorimetric method. The HT of C. obtusa was delayed in wilting against various abiotic stresses compared to the LT plants. The HT group exposed to UV did not significant influence the chlorophyll content, and the chlorophyll value was higher in the HT group than the LT group. Also, chilling treatment (5℃) did not significant influence on the chlorophyll content. However treatment at -4℃ showed relatively low chlorophyll content in the LT group than the HT group. Plants exposure to high temperature was not a difference between the HT and the LT group. However, treatment at 38℃ influenced the chlorophyll content that was increased exposure time-dependently. In salt treatments, chlorophyll in the HT group was lower at high concentrations (300 and 500 mM) of NaCl. However, chlorophyll content increased to slightly in treatment time-dependently, which is 6.7% to 40%. H2O2 treatment has been a negative effect on the chlorophyll content in the HT group. All concentration of H2O2 decreased the chlorophyll content of 5% to 35%. Plants containing high terpenoids were resisted against some abiotic stress such as salt and H2O2. Our results implied that terpenoids could cause various abiotic stress resistance. These results could be utilized for efficient management and biomass production during forest silvicultures.

ABSTRACT
 Introduction
 Materials and Methods
  1 Plant material
  2 Establishment of colorimetric method
  3 Selection of terpene high and low containingindividuals
  4 Treatment of various abiotic stress
  5 Determination of chlorophyll content
  6 Statistical analysis
 Results and Discussion
  1 Selection of individual for high and low terpenecontent
  2 Response against UV stress
  3 Response against cold stress
  4 Response against heat stress
  5 Response against salt stress
  6 Response against hydrogen peroxide inducedoxidative stress
 References

• Ji Yun Min(Division of Environmental Forest Science, Gyeongsang National University)
• Dong Jin Park(Department of Seed and Seedling Management, National Forest Seed and Variety Center)
• Seong Hyeon Yong(Division of Environmental Forest Science, Gyeongsang National University)
• Woo Hyeong Yang(Division of Environmental Forest Science, Gyeongsang National University)
• Yuwon Seol(Division of Environmental Forest Science, Gyeongsang National University)
• Eunji Choi(Division of Environmental Forest Science, Gyeongsang National University)
• Hak Gon Kim(Forest Research Department, Gyeongsangnam-do Forest Environment Research Institute)
• Myung Suk Choi(Division of Environmental Forest Science, Gyeongsang National University/Institute of Agriculture of Life Science, Gyeongsang National University) Corresponding author