Experimental warming alleviates the adverse effects from tropospheric ozone on two urban tree species

Abstract Atmospheric warming and increasing tropospheric ozone (O3) concentrations often co-occur in many cities of the world including China, adversely affecting health status urban trees. However, little information is known about combined interactive effects from increased air temperature (IT) elevated O3 (EO) exposures on tree species. Here, Ginkgo biloba Populus alba ‘Berolinensis’ seedlings were subjected to IT (+2 °C ambient temperature) and/or EO (+2-fold concentrations) for one growing season by using open-top chambers. alone had no significant effect physiological metabolisms at early stage, but significantly photosynthetic parameters, antioxidative enzyme activities (P