Bulletin of the National Research Centre

Table 5 The effect of vehicular air pollution on leaf extracts pH of selected tree species in the Kumasi Metropolis

From: Roadside air pollution in a tropical city: physiological and biochemical response from trees

Sampling site	Tree species
Sampling site	Terminalia catappa	Mangifera indica	Ficus platyphylla	Polyalthia longifolia
Control	6.15 ± 0.03^c	6.11 ± 0.01^d	6.13 ± 0.04^d	6.75 ± 0.02^d
Arterial road I	5.48 ± 0.01^b	5.08 ± 0.04^a	5.73 ± 0.01^c	5.73 ± 0.02^a
Arterial road II	5.09 ± 0.06^a	5.60 ± 0.01^c	5.13 ± 0.02^a	5.85 ± 0.02^b
Arterial road III	5.10 ± 0.01^a	5.47 ± 0.01^b	5.42 ± 0.01^b	5.95 ± 0.02^c

Mean ± SE in the same column with different letters in superscript is significantly different (P < 0.05)

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