Comparative Study of The Physiological Condition of Six Tree Species to Air Pollution in Depok City, West Java

Background: Air pollution is a threat to the environment. Sources of air pollutants in urban environments can be form dust, heavy metals, and hydrocarbons. Plants help clean from atmosphere by absorption through stomata, accumulating them, or adsorption on leaf surface. The Pollution Tolerance Index (APTI) used as an evaluation benchmark for Physiological conditions plants exposed pollution. This research aims study physiological six tree species Depok City area assess plants' tolerance level based APTI calculation. Methods: parameters measured calculate were ascorbic acid, total chlorophyll, extract pH, Relative Water Content (RWC). objects this Artocarpus altilis, heterophyllus, Bauhinia purpurea, Ficus septica, Filicium decipiens, Nephelium lappaceum. Results: Differences average acid values, RWC. In addition, there are also differences between two locations. Conclusions: decipiens plant with highest APTI, while heterophyllus has lowest. Based scores, lappaceum belong moderately tolerant category, altilis belongs intermediate sensitive category.