高浓度O3对树木生理生态的影响

目前全球范围内的O3污染日趋严重,特别是随着城市化的不断发展和大气O3浓度的不断升高,O3对植物的影响已越来越引起人们的关注.O3可以通过多种方式影响森林树木.结合近年来对城市森林主要树种与气候变化关系的研究和相关文献调查,综合报道和分析了国内外高浓度O3对森林树木生理生态影响研究的最新进展,具体包括高浓度O3对树木的可见伤害、树木的生长和形态结构、光合作用、物质代谢、抗氧化系统及其与其它生态因子(如温度、干旱、CO2等)复合作用对树木生理生态的影响.提出了一些目前研究中存在的主要问题和研究展望.这些报道为进一步开展高浓度O3对树木的生理生态学研究,特别是为全球气候变化背景下城市森林的可持续经营与管理以及树种选择提供科学参考和理论依据.

Impact of elevated O3 on eco-physiology of trees

Ozone (O3) is considered one of the important air pollutants in the present world. With the development of urbanization and the continuous increasing of atmospheric O3 concentration, more and more attention is focused on the impact of elevated O3 on plant. The impact of elevated O3 on trees is quite complicated. Based on the results of our experiments on the relationship between the trees and climate change in recent years, and related literature investigation, we will review the research advances in the impact of elevated O3 on eco-physiology of trees, such as the O3-induced visible injury, the impact of O3 on the growth and morphological structure, photosynthesis, nutrition metabolism, antioxidant system of trees and the impact of O3 in combination with other environmental factors, such as temperature, drought and elevated CO2. We hope these will provide a scientific reference for the further research on the impact of O3 on trees, especially on the sustainable forest management and the selection of urban tree species in respect to the increased atmosphere O3 concentration under the global climate change.