DefinePK

Abstract

The study examined Air Pollution Tolerance Indices APTI of four plant species around petrochemical station in south west of Iran and compared with unpolluted area. Four physiological and biochemical parameters ascorbic acid content AA, leaf Relative Water Content RWC, leaf extract pH and total leaf chlorophyll TCh were used to compute the APTI values. The result showed that combining variety of these parameters gave a more reliable result than those of individual parameter. The result showed order of tolerance in polluted area as E. camaldulensis 85 A. lebbeck 81 C. salignus 79 P. juliflora 58 and in unpolluted area as E. camaldulensis 84 A. lebbeck 67 C. salignus 62 P. juliflora 66. These results show that in cases that APTI increase from control site to polluted site improve the species tolerance to pollution stress.