biocriteria demonstrating of air pollution stress on the plane-tree (platanus orientalis l.)

increasing energy demands associated with economic growth and industrialization have resulted in dramatic increases in air pollution emissions. air pollution damages the plant mainly by disrupting cell homeostatic conditions.in the present study, diverse plant criteria indicating air pollution from different levels including cell biochemistry, leaf and tree crown in the plane-tree were determined, and their relation to the air pollutants such as ozone, nitrous oxide, nitrogen dioxide, sulfur dioxide, carbon dioxide and particulates was investigated. results showed that the concentration of chlorophyll a and chlorophyll b in the leaf of plane-tree are reduced with increase in the ozone concentration in the air. the concentration of chlorophyll a and chlorophyll b are negatively correlated with no in the autumn (r= -0.69 and -0.72, respectively). specific leaf area showed a positive relation with the concentration of ozone, nitrogen dioxide and carbon monoxide (p