安徽农业大学学报2012，Vol.39Issue(2)：286-291,6.
蟛蜞菊对污泥重金属的响应、吸收与富集作用
Wedelia trilobata's response to heavy metals and heavy metal absorption and enrichment in its body with sludge as a part of growth substrate
摘要
Abstract
Phytoremediation is a good method for solving more and more prominent heavy metal problems. However, plant's response to heavy metals and heavy metals accumulation in the plant's body are the basic scien tific issues in this field. In order to reveal the response of Wedelia trilobata to heavy metals and its accumulation effect in sludge, a soil experiment was designed and carried out. The physiological indexes in the leaves of W. Tri lobata, including chlorophyll content, peroxidase (POD) activity, and superoxide dismutase (SOD) activity after planting in different ratios of sludge (containing heavy metals) to sandy soil for three, four, five and six months, were detected respectively. The metals content (Cd, Cr, Mn, Ni, Pb, Cu, Zn) in the leaves, roots, and stems of W. Trilobata after planting in different ratios of the above growth substrate for six months, were also detected re spectively. The results showed that the chlorophyll content in the leaves of W. Trilobata significantly (P<0.05) as cended with the increase of sludge proportion; the POD activity and SOD activity significantly (P<0.05) changed with the increase of sludge proportion, and both significantly (P0.05) decreased after growth in the growth sub strate; it also showed that the content of Ni, Cu and Cr in the leaves of W. Trilobata were higher when grown in substrate with higher proportional sludge added (20% and 40% sludge). Our experiment suggest that the sludge is helpful to increase chlorophyll content in the leaves of W. Trilobata, which has strong tolerance to sludge heavy metals ,and it is a hyperaccumulator of Ni, Cu and Cr.关键词
蟛蜞菊/重金属污染/植物修复/生物富集Key words
Wedelia trilobata/heavy metal pollution/phytoremediation/bioaccumulation分类
资源环境引用本文复制引用
林茂兹,林能文,邱雪芬,张美燕..蟛蜞菊对污泥重金属的响应、吸收与富集作用[J].安徽农业大学学报,2012,39(2):286-291,6.基金项目
国家自然科学基金(30901151),福建省自然科学基金(2011J05062)和福建省教育厅项目(JA11284和JB10200)共同资助. （30901151）
