Bulletin of the National Research Centre

Table 6 The effect of vehicular air pollution on ascorbic acid contents (mg/g) 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	12.05 ± 0.01^a	14.38 ± 0.03^a	13.46 ± 0.10^a	10.91 ± 0.02^a
Arterial road I	19.81 ± 0.05^c	18.53 ± 0.04^d	15.97 ± 0.04^b	13.61 ± 0.05^c
Arterial road II	19.68 ± 0.19^c	17.18 ± 0.02^c	18.92 ± 0.04^c	12.09 ± 0.06^b
Arterial road III	15.41 ± 0.02^b	16.86 ± 0.05^b	16.03 ± 0.03^b	14.32 ± 0.15^d

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

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