Cadmium tolerance and accumulation in the seedlings of Mahogany (Swietenia macrophylla) for phytoextraction implications

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Cadmium tolerance and accumulation in the seedlings of Mahogany (Swietenia macrophylla) for phytoextraction implications
出版類型SCI(Sciences Citation Index)
出版年度2011
AuthorsK. C. Fan, 范貴珠, H.C. Hsi 席行正, C.W. Chen 陳振偉, Hong-Lin Lee 李鴻麟, & Hseu 許正一
開始頁2818
頁數4
出版日期2011 / 10
其他編號NSC99-2622-E-020-011-CC3
中文摘要

Mahogany, a high-biomass fast-growing tropical tree, has recently garnered considerable interest for potential use in heavy metal phytoremediation. This study performed hydroponic experiments with Cd concentration gradients at concentrations of 0, 7.5, 15, and 30 mg L-1 to identify Cd accumulation and tolerance of mahogany (Swietenia macrophylla) seedlings as well as their potential for phytoextraction. Experimental results indicate that Cd inhibited mahogany seedling growth at the highest Cd exposure concentration (30 mg L-1). Nevertheless, this woody species demonstrated great potential for phytoextraction at Cd concentrations of 7.5 and 15 mg L-1. The roots, twigs, and leaves had extremely large bioaccumulation factors at 10.3–65.1, indicating that the plant extracted large amounts of Cd from hydroponic solutions. Mahogany seedlings accumulated up to 154 mg kg-1 Cd in twigs at a Cd concentration of 15 mg L-1. Although Cd concentrations in leaves were <100 mg kg-1, these concentrations markedly exceed the normal ranges for other plants. Due to the high biomass production and Cd uptake capacity of mahogany shoots, this plant is a potential candidate for remediating Cd-contaminated sites in tropical regions.

網址http://www.elsevier.com
期刊名稱Journal of Environmental Management
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