Comparative analysis of leaf gas exchange and chlorophyll fluorescence of Euonymus japonicus Thunb by field experiment in the typical urban and suburban areas in Beijing Short-Term Responses of Leaf Gas Exchange Characteristics to Drought Stress of Cotinus coggygria Seedlings The response of leaf gas exchange to environmental factors of a dominant tree species, Endospermum chinense in tropical regeneration forest Comparative analysis of water related parameters and photosynthetic characteristics in the endangered plant Tetraena mongolica Maxim. and the closely related Zygophyllum xanthoxylon (Bunge) Maxim.