A Study on Air Pollution-Induced Biochemical Alterations in Conocarpus erectus

چکیده مقاله

Abstract

The present experiment was done to determine the impact of ambient air pollution on some biological factors in Conocarpus erectus plants using two sites; control (unpolluted) and polluted (around Mahshahr Petrochemical located in Khuozestan, south west of Iran). For this purpose, biochemical indicators such as soluble carbohydrate, protein content, malondialdehyde content, relative water content (RWC), leaf extract pH and air pollution tolerance index (APTI) were used to evaluate these effects. Air pollution tolerance index is used by landscapers to select plant species tolerant to air pollution. Four physiological and biochemical parameters including leaf relative water content (RWC), ascorbicacid (AA) content, total leaf chlorophyll (ChlT), and leaf extract pH were used to develop an APTI. Plants exposed to pollution showed lower RWC and leaf extract pH as compared to plants growing in control site. Protein, soluble carbohydrate and malondialdehyde content levels in polluted leaves significantly increased. The APTI of species indicated as an ideal candidate for landscape planting in the vicinity of polluting industry. Finally, on the basis of the observed changes in this plant, this plant can be considered as an indicator for air pollution and subsequently planning for air pollution control.

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