Volume No. 7 Issue No.: 2 Page No.: 675-681 Oct. - Dec. 2012

 

SELECTION OF TOLERANT SPECIES OF ROAD SIDE PLANTS AGAINST OF AIR POLLUTION IN VARANASI, INDIA

 

Mishra Amit, Pandey Poonam*1 and Singh Abhishek Kumar2

1. Environment Monitoring Section, Indian Institute of Toxicology research, Lucknow (INDIA)
2. Department of Botany, University of Lucknow, Lucknow (INDIA)

 

Received on : July 05, 2012

 

ABSTRACT

 

Selection of plant species that tolerant to air pollutants and also that sensitive to air pollutants has a significant impact in determination and reclamation of air pollution. Urban air pollutants like particulate matter, sulfur dioxide, nitrogen oxides, ozone etc can harm the plants. It can absorbs through stomata and affects adversely its biochemical constituents and physiological process.The variation in biochemical parameters in the leaves can be used as indicators of air pollution for early diagnosis of stress or as a marker for physiological damage prior to the onset of visible injury symptoms. In this study examined four physiological and biochemical parameters, viz., leaf Relative Water Content (RWC), Ascorbic Acid content (AA), Total leaf chlorophyll (TCh) and leaf extract pH were used to compute the APTI values of seven plant species in different locations with representing different activities in Varanasi city, India. Air quality in terms of sulfur dioxide, nitrogen oxides, respirable particulate matter and ozone also monitored during study period. The levels of pollutants concentration in ambient air of monitoring locations are found maximum in Lahurabir (commercial cum traffic area) followed by Lahartara (industrial area) and Maidagin (traffic area) and Mehmoorganj (residential area)>BHU (control area).The result showed order of tolerance as Bougenvilia spectabilis (9.469)>Ashoka indica (9.4028)> Ficus relegiosa (9.3872)> Alstonia scholaris (9.2371)> Nerium indicum (8.877)>Mangifera indica (7.6702)> Azardirachta indica (7.1655). The plants show high APTI value can tolerate the air pollution so they are the best plants for use the plantation in the city area and these plants species has also been evaluated for green belt development

 

Keywords : Air pollution tolerance index, Chlorophyll, Ascorbic acid, Green belt, Bio-chemical parameters

 

 

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