Effects of air pollution on leaf structure and growth performances of Pterocarpus indicus Willd. Seedlings
1995
Sapit Royampaeng | Ladawan Puangchit (Royal Forest Dept., Bangkok (Thailand). Forest Research Office. Silviculture Research Div.)
Present study was aimed at determining the responses of leaf structure and growth performances, i.e. height growth, dry biomass and leaf area of P. indicus seedlings exposed to air pollution compared with the controlled ones. The result indicated that there were slight changes in leaf structure of seedling exposed to air pollution, including leaf thickness, palisade layer thickness, number of palisade cells, and number of trichomes. No statistical differences in stomatal frequency and size as related to air pollution were observed (p0.05). The height growth, total leaf area, and dry biomass of polluted seedlings were reduced significantly. However, there were no statistically significant differences in biomass RGR between controlled and polluted seedlings.
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