Bauddh Kuldeep, Singh Kripal, Singh Rana P
Bull Environ Contam Toxicol. 2016 Feb;96(2):265-9. doi: 10.1007/s00128-015-1669-3.
Heavy metal pollution of soil is a global environmental problem and therefore its remediation is of paramount importance. Cadmium (Cd) is a potential toxicant to living organisms and even at very low concentrations. This study was aimed to assess the effectiveness of Ricinus communis for remediation of Cd contaminated soils. For this, growth and biomass of R. communis and Cd accumulation, translocation and partitioning in different plant parts were investigated after 8 months of plant growth in Cd contaminated soil (17.50 mg Cd kg−1 soil). Eight months old plants stabilized 51 % Cd in its roots and rest of the metal was transferred to the stem and leaves. There were no significant differences in growth, biomass and yield between control and Cd treated plants, except fresh weight of shoots. The seed yield per plant was reduced only by 5 % of Cd contaminated plants than control. The amount of Cd translocated to the castor seeds was nominal i.e. 0.007 µg Cd g−1 seeds. The bioconcentration factor reduced significantly in shoots and seeds in comparison to roots. The data indicates that R. communis is highly tolerant to Cd contamination and can be used for remediation of heavy metal polluted sites.
土壤重金属污染是一个全球性的环境问题，因此对其进行修复至关重要。镉（Cd）即使在浓度很低的情况下，对生物体也是一种潜在的有毒物质。本研究旨在评估蓖麻对镉污染土壤的修复效果。为此，在镉污染土壤（17.50毫克镉/千克土壤）中种植8个月后，对蓖麻的生长、生物量以及镉在不同植物部位的积累、转运和分配情况进行了研究。8个月大的植株将51%的镉固定在根部，其余的金属则转移到茎和叶中。除了地上部分的鲜重外，对照植株和镉处理植株在生长、生物量和产量方面没有显著差异。每株镉污染植株的种子产量仅比对照降低了5%。转移到蓖麻籽中的镉含量极少，即0.007微克镉/克种子。与根部相比，地上部分和种子中的生物富集系数显著降低。数据表明，蓖麻对镉污染具有高度耐受性，可用于修复重金属污染场地。
