This study focused on the effects of eight medicinal plant extracts on Solanum nigrum L. potential to accumulate Cd and Pb from soil. These medicinal plants were common and relatively cheap. The eight 10% water extracts were made from the peel of Citrus reticulata Blanco (PCR), fruit of Phyllanthus emblica L. (FPE), root of Pueraria Lobata (Willd.) Ohwi (RPL), rhizome of Polygonatum sibiricum Red (RPS), root of Astragalus propinquus Schischkin (RAP), bud of Hemerocallis citrina Baroni (BHC), seed of Nelumbo nucifera Gaertn (SNN) and fruit of Prunus mume (Sieb.) Sieb.etZuce (FPM). The results showed that among all exposures, the treatment with FPE resulted in the significant increase (p < 0.05) of Cd and Pb concentration in shoots and roots of S. nigrum by 32.5% and 65.2% for Cd, and 38.7% and 39.6% for Pb. The biomasses of S. nigrum in all plant extract treatments were not significantly changed (p < 0.05) compared to the control (CK). The Cd and Pb extraction rates of S. nigrum in FPE treatment were increased respectively by 60.5% and 40.5% compared to CK. Though the treatment with EDTA significantly improved (p < 0.05) the concentration of Cd and Pb of S. nigrum, the Cd and Pb masses (ug plant⁻¹) of S. nigrum did not show any significant difference compared to the CK due to the significant decrease in the shoot (20.4%) and root (22.0%) biomasses. The chelative role of FPE might be relation with its higher polyphenolic compounds. However, not sure if the contents of polyphenolic compounds was the only differences between FPE and other additives. Thus, some unknown organic matters might also play active role. This study provided valuable information on improving the phytoremediation potential of hyperaccumulator.

本研究的重点是八种药用植物提取物对Solanum nigrum L. 从土壤中积累 Cd 和 Pb 的潜力的影响。这些药用植物很常见，而且相对便宜。8 种 10% 水提取物由柑橘皮(PCR)、余甘子果实(FPE)、葛根(Willd.) Ohwi (RPL)、黄精的根茎(RPS)制成,黄芪(RAP) 的根、Hemerocallis citrina Baroni (BHC) 的芽、Nelumbo nucifera Gaertn (SNN) 的种子和Prunus mume 的果实(Sieb.) Sieb.etZuce (FPM)。结果表明，在所有暴露中，FPE 处理导致S. nigrum枝条和根中 Cd 和 Pb 浓度显着增加（p < 0.05），Cd 分别增加32.5% 和 65.2%，以及 38.7% 和 39.6%对于 Pb。与对照 (CK) 相比，所有植物提取物处理中的S. nigrum的生物量没有显着变化 (p < 0.05)。与CK相比，FPE处理中S. nigrum的Cd和Pb提取率分别提高了60.5%和40.5%。虽然用EDTA处理显著改善（P <0.05）的镉和铅的浓度龙葵，镉和铅的质量（微克植物^-1的）龙葵由于地上部 (20.4%) 和根 (22.0%) 生物量显着降低，与 CK 相比没有显示任何显着差异。FPE 的螯合作用可能与其较高的多酚化合物有关。但是，不确定多酚化合物的含量是否是 FPE 和其他添加剂之间的唯一区别。因此，一些未知的有机物也可能发挥积极作用。该研究为提高超富集植物的植物修复潜力提供了有价值的信息。