Evaluation of Tolerant plant species in Urban Environment: A case study from Hyderabad, India
Journal Title: Universal Journal of Environmental Research and Technology - Year 2012, Vol 2, Issue 4
Abstract
For the evaluation of tolerant capacity of the plant species to air pollution, four physiological and bio-chemical parameters namely leaf Relative Water Content, Ascorbic acid, leaf Chlorophyll content and leaf extract pH were used. By computing these parameters together in a formulation, it signifies the Air Pollution Tolerance Index (APTI) of plants. In the present study, sixteen plant species were selected which are commonly growing in different areas like residential areas, traffic areas, industrial areas and peri-urban areas of Hyderabad, Andhra Pradesh state, India. On the basis of tolerance index value, the plant species were characterized into sensitive, intermediately tolerant, moderately tolerant and tolerant plant species. Delonix regia Hook., Peltophorum pterocarpum DC., Alestonia scholaris L., Ficus religiosa L., Samania saman Jacq. and Azardirachta indica A. Juss. expressed high APTI values and these are suitable sinks to mitigate the air pollution. Millingtonia hortensis L.f., Clerodendrum paniculatum L., Terminalia arjuna Roxb., Pongamia pinnata L., Polyalthia longifonia Sonn. and Emblica officinalis Gaertner. showed intermediate tolerance capacity and the other four plant species Syzygium cumin L.i, Terminalia catappa L., Swietenia mahagoni L. and Saraca indica L. acts as bio-indicators of air pollution stress as these are sensitive to the air pollution.
Authors and Affiliations
Uma Devi Randhi and M. Anji Reddy
Keywords
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