Selection of Ozone Tolerant Individuals of Cornus controversa
2003
Jang, S.S. | Lee, J.C. | Han, S.H. (Dept. of Forest Genetic Resources, Korea Forest Research Institute, Suwon, Republic of Korea) | Kim, H.E. (Chungbuk National University, Chungju, Republic of Korea)
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 seedings were grown in greenhouses and exposed to 100ppb 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¡Â0.001) with height growth performance. Height and MDA content of tolerant individuals presented significant differences from those of sensitive individuals.
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