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Selection of Ozone Tolerant Individuals of Cornus controversa  

장석성 (임업연구원 산림유전자원부)
이재천 (임업연구원 산림유전자원부)
한심희 (임업연구원 산림유전자원부)
김홍은 (충북대학교 산림과학부)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.5, no.1, 2003 , pp. 6-10 More about this Journal
Abstract
This study was conducted to select the ozone tolerant individuals of Cornus controversa Hemsl., and to use malondialdehyde (MDA) content as an indicator of plant damage level for several oxidative stress levels. Seeds of C. controversa were collected at 9 provinces in Korea. One-year-old seedlings were grown in greenhouses and exposed to 100 pub ozone concentration for 8h day$^{-1}$ for 10 weeks. At the termination of ozone exposure, heights of seedlings were measured and MDA contents in the leaves were analyzed. Tolerant, intermediate, and sensitive individuals were selected using the standardized indices of height and MDA content. Height and MDA content of C. controversa exposed to ozone were significantly different among individuals and provinces. MDA content showed negative correlation (r=-0.531, p$\leq$ 0.001) with height growth performance. Height and MDA content of tolerant individuals presented significant differences from those of sensitive individuals. As a result, MDA content may be suitable for the evaluation of the damage level of plants by oxidative stress.
Keywords
malondialdehyde; MDA; indicator; oxidative stress; damage;
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