a Department of Botany and Microbiology , Faculty of Science, Helwan University , Cairo , Egypt.
Int J Phytoremediation. 2017 Nov 2;19(11):992-999. doi: 10.1080/15226514.2017.1303816.
The present study was conducted to investigate the potential of Vossia cuspidata as a phytoremediator to accumulate heavy metals from polluted water bodies. Thirty-two quadrats, distributed equally in eight sites (six polluted sites along the Ismailia canal and two unpolluted sites along the Nile River) were selected seasonally for plant, water, and sediment investigations. Winter plants recorded the highest values of shoot height, diameter, and leaf width, but the lowest shoot density. Plants collected in autumn had the lowest values of leaf length, width, and area, while those collected in spring had the highest shoot density, with the lowest shoot height. Summer populations had the highest fresh and dry plant biomass, while winter plants had the lowest. Fresh production and dry biomass of V. cuspidata in the unpolluted Nile were significantly higher than those in polluted canals. Chlorophyll a and carotenoid concentrations were reduced under pollution stress. Spring plants accumulated the highest concentrations of Cr, Cu, and Pb in their root, and the lowest concentrations of Al, Cd, Cr, and Zn in their shoot. The bioaccumulation factor for most investigated metals, except Al, Cr, and Fe was greater than 1, while the translocation factor of all metals was less than 1, therefore this plant is considered to be a potential for these metals phytostabilization.
本研究旨在探讨水茄作为一种植物修复剂，从受污染水体中积累重金属的潜力。本研究共设置 32 个样方，均匀分布在 8 个地点（沿伊斯梅利亚运河的 6 个污染点和沿尼罗河的 2 个未污染点），进行植物、水和沉积物的调查。冬季植物的茎高、茎直径和叶宽最大，但茎密度最低。秋季采集的植物叶片长度、宽度和面积最小，而春季采集的植物茎密度最大，茎高最低。夏季植物的鲜重和干重生物量最高，而冬季植物的最低。在未受污染的尼罗河中，水茄的鲜重和干重生物量显著高于污染运河中的。叶绿素 a 和类胡萝卜素浓度在污染胁迫下降低。春季植物根部积累的 Cr、Cu 和 Pb 浓度最高，而茎部的 Al、Cd、Cr 和 Zn 浓度最低。除 Al、Cr 和 Fe 外，大多数调查金属的生物积累系数大于 1，而所有金属的迁移系数均小于 1，因此该植物被认为是这些金属的潜在植物稳定化剂。
