Changes on Photosynthesis and SOD Activity in Platanus orientalis and Liriodendron tulipifera According to Ozone Exposing Period
2005
Lee, J.C. (Korea Forest Research Institute, Suwon, Republic of Korea) | Kim, P.G. (Sangju National University, Sangju, Republic of Korea) | Oh, C.Y. (Korea Forest Research Institute, Suwon, Republic of Korea) | Han, S.H. (Korea Forest Research Institute, Suwon, Republic of Korea), E-mail: [email protected]
This study was conducted to compare the physiological and biochemical responses of P. orientalis and L. tulipifera in response to ozone. One-year-old seedlings of P. orientalis and L. tulipifera were exposed to 100 ppb ozone concentration for 2, 4, or 8 hr/day for 1 week. Photosynthesis, stomatal conductance and ozone uptake rate were measured daily, and chlorophyll fluorescence, carboxylation efficiency, chlorophyll content, and SOD activity were measured after 1 week. In P. orientalis, photosynthesis and stomatal conductance were not decreased in the 2 h/day ozone treatment, but the L. tulipifera response was more sensitive even in the 2 h/day ozone treatment.
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