Abstract
The study examined the air pollution tolerance indices (APTI) of six plant species around Otorogun gas plant in Ughelli-South Local Government Area of Delta State. Four physiological and biochemical parameters, which are leaf relative water content (RWC), Ascorbic acid content (AA), total leaf chlorophyll (TCh) and leaf extract pH were used to compute the APTI values. The result showed order of tolerance as Emilia Samtifolia(1.49%)> Manihot esculenta (2.19%)> Elaesis guineensis (2.41%)> Impereta cylindrical (25.56%)> Eupatorium Odoratum (35.17%)> Psidium guayava (45.11%).
Highlights
All combustion releases gases and particles into the air
Studies has shown the impacts of air pollution on Ascorbic acid content (Hoque, et al 2007) chlorophyll content (Flowers et al 2007), leaf extract pH (Klumpp et al 2000) and relative water content (Rao 1979)
The air pollution tolerance index (APTI) based on all four parameters has been used for identifying tolerance levels of plant species (Singh and Rao, 1993; Yan-Ju and Ding, 2007; Singh et al 1991); Several contributors agrees that air pollutants effect plant growth adversely (Rao, 2006; Bhatia, 2006; Sodhi, 2007; Horsefall, 1998)
Summary
All combustion releases gases and particles into the air. These can include sulphur and nitrogen oxides, carbon monoxide and soot particles, as well as smaller quantities of toxic metals, organic molecules and radioactive isotopes. Studies has shown the impacts of air pollution on Ascorbic acid content (Hoque, et al 2007) chlorophyll content (Flowers et al 2007), leaf extract pH (Klumpp et al 2000) and relative water content (Rao 1979). These separate parameters gave conflicting results for same species (Han, et al 1995). The air pollution tolerance index (APTI) based on all four parameters has been used for identifying tolerance levels of plant species (Singh and Rao, 1993; Yan-Ju and Ding, 2007; Singh et al 1991); Several contributors agrees that air pollutants effect plant growth adversely (Rao, 2006; Bhatia, 2006; Sodhi, 2007; Horsefall, 1998). The study will identify the plant species which are tolerant to the prevailing atmospheric conditions
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