Growth, Photosynthesis, and Ascorbate Peroxidase Activity of Several Species to the Ozone Exposure

摘要

The purpose of this study was to identify the effects of ozone pollution on the 3 tree species in controlled environment. Ailanthus altissima, Liriodendron tulipifera, and Platanus occldentalis seedlings were examined in both control and ozone chambers to investigate growth, photosynthesis, and antioxidant enzymes such as Ascorbate peroxidase(APX). Ozone was fumigated 8 hours/day for 34 days with 150 ppb concentration. Photosynthesis of Platanus occidentalis was higher than those of Ailanthus altissima and Liriodendron tulipifera. APX activities of 3 tree species exposed in ozone chamber were higher than those of control in every measurement. It is a typical compensatory strategy of trees of stressed environment.