Journal of Environmental Biology

Air pollution induced changes in the photosynthetic pigments of selected plant species

 

P.C. Joshi* and Abhishek Swami

Department of Zoology and Environmental Sciences, Gurukul Kangri University, Haridwar - 249 404, India

(Received: July 19, 2007; Revised received: October 25, 2007; Accepted: November 11, 2007)

Abstract: Changes in the concentration of different photosynthetic pigments (Chlorophyll and carotenoids) were determined in the leaves of six tree species exposed to air pollution due to vehicular emissions. The six tree species, which are all economically important because of their being fruit bearers, used for timber, fodder and as road side trees on the basis of their air pollution tolerance index. These included Mangifera indica L., Tectona grandis Linn.f., Shorea robusta Gaertn.f., Holoptelea integrifolia (Roxb.) Planch, Eucalyptus citridora? Hook. Syn. and Mallotus philippinensis Muell-Arg. Reduction in chlorophyll ?a?, ?b? and carotenoid was recorded in the leaf samples collected from polluted areas when compared with samples from control areas. The highest reduction in total chlorophyll was observed in Holoptelea integrifolia (Roxb.) (48.73%) Planch whereas, the lowest reduction (17.84 %) was recorded in Mallotus philippinensis Muell-Arg. Similarly in case of carotenoid contents, highest reduction (43.02 %) was observed in Eucalyptus citridora, and lowest? in Mallotus philippinensis Muell-Arg (19.31 %). The data obtained were further analyzed using one-way ANOVA and a significant change was recorded in the studied parameters. These studies clearly indicate that the vehicular induced air pollution reduces the concentration of photosynthetic pigments in the trees exposed to road side pollution

Key words: Automobile emissions, Photosynthetic pigments, Chlorophyll, Carotenoids

PDF of full length paper is available with author (*prakash127@yahoo.com)

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