Abstract
The effects of elevated O3 (O3) on photosynthetic characteristics of urban trees were studied in an open-top air chamber. The results showed that net photosynthetic rate (Pn), transpiration rate (Et), stomatal conductance (Gs) and water use efficiency (WUE) of different tree species decreased significantly with the increase of O3 concentration, while intercellular CO2 (Ci) concentration of different tree species increased significantly with the increase of O3 concentration. Under different O3 concentrations, the net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration of Ginkgo biloba (G. biloba) and Koelreuteria paniculata (K. paniculata.) were higher than those of Pinus bungeana (P. bungeana) and Platycladus orientalis(P. orientalis), and the WUE of P. bungeana and P. orientalis was higher than that of G. biloba and K. paniculata. The effect of elevated O3 concentration on plant photosynthesis is more obvious in K. paniculata and G. biloba.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
