Air pollution tolerant Species in city green area

Document Type : Research Paper


forest and range land of research institute


The negative effects of air pollution impress plants to develop different morphological and anatomical changes. On the other hand in large cities plants (especially trees) help to increase the quality of air. Therefore the plants which balance internal structure and polluted environment, can deeply affect the quality of air in the cities. This study determine the suitable indexes to select tolerance of species which are widely planted in Tehran. In order to carry out this research, seven study areas was selected. Seven morphological (Leaf area, Dry and wet weight, thickness, specific leaf area, water content percentage) and 20 anatomical parameters was measured and calculated on Robinia pseudoacacia, Fraxinus rotundifolia, and Platanus orientalis. Sorkhe-Hesar and Azadi was introduced as areas that affect air pollution and climate and soil parameters was similar in both areas. Significant decrease and increase in some vegetation characteristics was observed in all study species. Leaf thickness (Sorkhehesar= 0.12, Azadi= 0.14 and P<0.01), Upper cuticul thickness (Sorkhehesar= 1.9, Azadi= 3.5 and P<0.05), Rp/Rs (sorkhehesar= 1.2, Azadi= 1.9 and P<0.05) and abaxial stomata density (Sorkhehesar= 347, Azadi= 444 and P< 0.05) shows significant increase in Black locust. Significant relations with air pollution tolerance indicator is the most in Black locust and the least in plane. The results of this study introduce R. pseudoacacia as suitable species than the other plants (plane and ash) to air pollution condition.


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