Comparative Assessment of Air Pollution Tolerance Index and Anticipated Performance Index of Common Ornamental Plants along   Roadside of Kathmandu Valley, Nepal

IJEP 43(8): 705-714 : Vol. 43 Issue. 8 (August 2023)

Sumant K. Ranjan and Anjana Devkota*

Tribhuvan University, Central Department of Botany, Kathmandu 46000, Nepal


The investigation was carried out during the year 2020 to study the air pollution tolerance index and anticipated performance index of common ornamental plants, namely Hibiscus rosa-sinensis, Malvaviscus arboreus, Jasminum multiflorum and Pyrostegia venusta growing along roadside of Kathmandu valley. In selected species chlorophyll content and leaf abstract pH varied from 1.89-2.00 mg/g and 6.46-7.05, respectively which increased with decreasing pollution level. Whereas, relative water content and ascorbic acid decreased with decreasing pollution level with respective values of 85.67-81.20% and 0.58-0.47 mg/g. The trend of air pollution tolerance index (APTI) of the selected plant species was Malvaviscus arboreus (9.12)>Hibiscus rosa-sinensis (8.67)>Jasminum multiflorum (8.90)>Pyrostegia venusta (8.31). The highest APTI was noticed in post-monsoon months followed by pre-monsoon months. The assessment of the anticipated performance index (API) with respect to the selected plant species was observed to lie in the range of very poor to good. Hence, Malvaviscus arboreus and Hibiscus rosa-sinensis with higher tolerance and anticipated performance index can be suggested for plantation alongside the road so as to intercept the air pollutants which act as health hazards to the people of urban areas.


Air pollution tolerance index, Anticipated performance index, Biochemical characteristics,  Ornamental plants


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