[Progress in the Interactions of Ozone Pollution and Other Environmental Stress on Urban Forests in China].

Ground-level ozone pollution(O) and climate change have become key global problems threatening the environment and sustainable development of urban forests. At present, various studies have assessed the O impacts on trees; however, it is difficult to accurately evaluate the complex ecological effects caused by multiple factors on the natural urban environment. In this paper, the interactions between O and carbon dioxide(CO), drought, nitrogen deposition, and warming, as well as the effects of the physiology, biochemistry, and growth of urban trees in China were reviewed. Elevated CO could alleviate the negative effects of elevated O on the photosynthetic metabolism, antioxidant system, and growth of trees. There is a complex interaction between O and drought, which may synergistically aggravate, alleviate, or have no effect on trees. However, there was no correlation between O and N deposition, only a significant interaction between elevated temperatures and O, which slowed down the adverse effects of O on tree growth and photosynthesis. Finally, suggestions are put forward to manage and sustainable develop urban forests in China under future climate change and air pollution.