ИСТИНА

The technique for recording of chlorophyll a fluorescence induction kinetics has been used forassessment of the physiological state of leaves of tillet (Tilia cordata), pendent white birch (Betulapendula), American arborvitae (Thuja occidentalis) in urban environments. Different sensitivity of plants to adverse growing conditions was observed. The most sensitive JIP test parameters such as PIABS, FV/F0, FV/FM, Rfd are determined to be used as indicators of the physiological state of urban phytocenosis. Recommendations for the application of this technique in monitoring studies are given.