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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
Terminalia catappa Mangifera indica Ficus platyphylla Polyalthia longifolia
Control 6.15 ± 0.03c 6.11 ± 0.01d 6.13 ± 0.04d 6.75 ± 0.02d
Arterial road I 5.48 ± 0.01b 5.08 ± 0.04a 5.73 ± 0.01c 5.73 ± 0.02a
Arterial road II 5.09 ± 0.06a 5.60 ± 0.01c 5.13 ± 0.02a 5.85 ± 0.02b
Arterial road III 5.10 ± 0.01a 5.47 ± 0.01b 5.42 ± 0.01b 5.95 ± 0.02c
  1. Mean ± SE in the same column with different letters in superscript is significantly different (P < 0.05)