Assessment
of air pollution tolerance index of some trees
in
Haridwar City, Uttarakhand
Sangeeta Madan*
and Pooja Verma
Department of
Environmental Sciences, Kanya Gurukul Campus, Gurukul Kangri Vishwavidyalay,
Haridwar-249 404, India
*Corresponding
Author?s E-mail: n.madan79@gmail.com
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Publication
Data
Paper received:
13 August 2013
Revised received:
01 August 2014
Accepted:
22 September 2014
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Abstract
Three
different plant species i.e., Ficus religiosa, Polyalthia longifolia and
Azadirachta indica were collected from residential (S1), commercial (S2),
industrial (S3) and control areas of the city to study the relative tolerance
of plant species. Variation in biochemical parameters like relative water
content, leaf pH, ascorbic acid, total chlorophyll, carotenoids and dust
interception efficiency were found to be pollution load dependent. These
variations can be used as indicators of air pollution for early diagnosis of
stress or as a marker for physiological damage to trees prior to the onset of
visible injury symptoms. The present findings showed that maximum APTI was
observed in Azadirachta indica and minimum in Ficus religiosa. ?
Key
words
Air
pollution tolerance index, Ascorbic acid, Carotenoid, Total chlorophyll
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