Slowed down fluorescence and pattern changes of FA(fluctuating asymmetry) parameters of plant tree leaves of tree-shaped bushes as: Оlea europea L., Quercus ilex L., Populus nigra L., Eucalyptus cameldulensis Dehn., Platanus orientalis L., Ligustrum japonica Thund. as well Pinus eldarica L. tree plants widely spread in Baku (The Azerbaijan Republic) in the research areas that ecologically called risky where technogenic pollution is considered the most polluted area of the city. The results of the research showed change at FA and slowed down fluorescence parameters of chlorophyll of investigated plant leaves collected from urbanized environment that more loaded by harmful components; morphometric structural changes at tree leaves developed in the polluted condition of environment possible to correspond changes of intra-organism physiological state. The results of the research provide new opportunities to use in environmental assessment at ecological monitoring of Baku.