Biochemical changes of Conocarpus erectus (combretaceae) in response to gas refinery air pollution as an air pollution indicator

Document Type : Original Research Paper


1 Professor of Plant physiology, Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 Professor of Microbiololgy, Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran

3 Biotechnology and Biological Science Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran

4 MSc. Student, Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran

10.7508/pj.2017.02. 002


Environmental pollution consists of different types of pollutants in air, soil, and water. Due to the fact that plants can respond to environmental pollution, they can be used as bio-indicators for environmental monitoring. Air pollution in areas with oil and gas refineries nearby is an important problem. This study aims to survey the effects of gas refinery air pollutants on Conocarpus erectus so that it can be used for air-pollution monitoring. For this purpose, physiological indicators such as proline, protein, and malondealdehyde content as well as Air Pollution Tolerance Index (APTI value) have been used to evaluate these effects. Based on the obtained results, Conocarpus erectus in polluted area showed increased pH, protein, proline, malondealdehyde, and ascorbic acid contents while carotenoid quantity, total leaf chlorophyll content, and relative water content were decreased in comparison to the control plants. Therefore, it proves that air pollution affects the plant.


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