Air pollution tolerance index: A sentinel for pollution control

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Quadri Agbolade Anibaba, Ecology, Institute of Dendrology of the Polish Academy of Sciences, Kórnik, Poland and Thaddeus T. Gbem, Biology, Ahmadu Bello University, Zaria, Nigeria

Background/Question/Methods
Air pollution is one of the major environmental problem facing the globe today. Air Pollution Tolerance Index (APTI) has been developed and used to identify tolerance levels of plant species based on four physiological parameters.
We examined the APTI of seven different tree species growing around electricity-generating houses within the Ahmadu Bello University (ABU) main Campus, Samaru, Zaria, Nigeria.
Four parameters, leaf relative water content (RWC), ascorbic acid content (AA), Total chlorophyll (TCH), and pH of leave extract were used to compute the APTI of the tree species.
Results/Conclusions
We found in the order of tolerance showing Azadirachta indica (9.8) < Carica papaya (11.5) < Albizia lebbeck (14.9) < Senna siamea (17.0) Our finding will assist horticulturists, landscapers and environmental scientists in the selection of air pollution tolerant plants that can be planted in air pollution prone areas. These identified plants could also act as biomonitors in the management and control of air pollution not only in ABU Campus but in the environment in general.