Analyzing the Effects of Urban Photopollution on Photosynthetic Efficiency of Certain Trees through Chlorophyll Fluorescence OJIP Transient

Trees in urban areas provide important ecosystem services and are an essential element of green space. The constant increase artificial light from anthropogenic activities around the world creates photopollution that affects phenology physiology plants. Here we conducted a field study to investigate impacts on six trees (Saraca asoca, Terminalia catappa, Bauhinia variegata, Holoptelea integrifolia, Ficus benjamina Thevetia peruviana) using chlorophyll fluorescence analysis. OJIP curve, maximum quantum yield primary photochemistry (ΦPo), electron transport (ΦEo), probability absorbed photon will be dissipated (ΦDo), photosynthetic performance index (PIcsm) reaction center were assessed. According results, various parameters showed significant effects different tree species. T. peruviana F. found tolerant street lighting, while other hand, S. B. variegata H. integrifolia sensitive induced by lamps. This clearly indicates analysis is potent method for screening tolerance species lights.