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| Lead tolerance and accumulation characteristics of the ‘Summer Glory’ Sedum spurium |
| Received:April 08, 2018 Revised:June 27, 2018 |
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| KeyWord:lead stress;Sedum spurium ‘Summer Glory’;tolerance characteristics;accumulation characteristics |
| Author Name | Affiliation | E-mail | | GUAN Hai-yan | Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China | | | QU Qi-qi | Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China | | | ZHAO Fan | Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China | | | WANG Ruo-peng | Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China | | | YAN Shang-bo | Chinese Academy of Forestry, Beijing 100091, China | | | DONG Li | Beijing Key Laboratory of Ornamental Plants Germplasm Innovation & Molecular Breeding, National Engineering Research Center for Floriculture, Beijing Laboratory of Urban and Rural Ecological Environment, College of Landscape Architecture, Beijing Forestry University, Beijing 100083, China | dongli@bjfu.edu.cn |
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| Abstract: |
| The goal of this study was to examine the growth and physiological characteristics of ‘Summer Glory’, Sedum spurium, under lead (Pb)stress 0 (CK), 250, 500, 1000, 2000, 4000 mg·kg-1, and 8000 mg·kg-1 to evaluate its capacity for Pb tolerance and accumulation. When the Pb concentration of the soil increased from 0 to 8000 mg·kg-1, the malondialdehyde (MDA)concentration continued to increase up to 60.39% higher than that of the control for the highest level of treatment (8000 mg·kg-1). The dry weight in the shoots and roots, superoxide dismutase (SOD)activities, and phytochelatins (PCs)concentration increased to the highest level at 4000 mg·kg-1 and 1000 mg·kg-1 concentrations, respectively, and were followed by a continuous decrease when the concentration increased. When compared to the control after 90 days of treatment, the dry weight in the shoots and roots, SOD activities and PCs concentration at the highest treatment level (8000 mg·kg-1)decreased by 33.13%, 55.88%, 4.59%, and 16.62%, respectively. The Pb concentration in the shoots and roots were significantly and positively correlated with the Pb concentration of the soil, while the translocation factor and bioconcentration factor were negatively correlated with the Pb concentration of the soil. In addition, the Pb concentration in the roots had the highest level at 604.13 mg·kg-1 and was much greater than that in the shoots. These results demonstrate that ‘Summer Glory’ has a strong tolerance and accumulation ability of Pb and can be considered as a candidate species for the phytoremediation and greening of Pb contaminated soil. |
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