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http://dx.doi.org/10.17820/eri.2015.2.3.237

Eco-physiological Responses of Roadside Tree Species to Contamination of Soil with Lead  

Kim, Han Eol (Department of Biology, Jeju National University)
Song, Uhram (Department of Biology, Jeju National University)
Publication Information
Ecology and Resilient Infrastructure / v.2, no.3, 2015 , pp. 237-246 More about this Journal
Abstract
Heavy metal pollution in soil, such as lead contamination, has become an area of interest in Korea because of urbanization and atmospheric deposition from neighboring countries. Therefore, in this research, eco-physiological responses such as chlorophyll contents, antioxidant enzyme activity, photosynthetic rate, biomass and phytoaccumulation abilities were investigated for 4 commonly used native roadside tree species to suggest suitable tree species to cope with lead contamination. The target species, Ginkgo biloba, Prunus yedoensis, Zelkova serrata and Chionanthus retusus showed lead toxicity by significant changes of chlorophyll contents and antioxidant enzyme activities on treatments over 200 mg Pb/kg. However, biomass and photosynthetic rates only showed significant responses of plants in the highest level (5,000 mg/kg) treatment. Especially, G. biloba did not show any significant changes of antioxidant enzyme activity, photosynthetic rate, and biomass even in the highest level treatment. In low level - environmentally realistic treatments, G. biloba and P. yedoensis showed the highest phytoaccumulation rate of lead from soil. Selecting and planting species like G. biloba which have good phytoaccumulation abilities and resistance to lead contamination by further research will be required to deal with emerging lead contamination.
Keywords
Eco-physiological response; Lead; Phytoaccumulation; Roadside tree; Soil;
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