A pot experiment was conducted to evaluate the phytoremediation efficacies of seven weed plant species, viz., Bidens pilosa L., Chenopodium album L., Malvastrum coromandelianum L., Garcke, Oxalis corniculata L., Parthenium hysterophorus L. (an invasive species), Polypogon monspeliensis L., and Rumex dentatus L., against heavy metals like chromium (Cr) and Nickel (Ni). These metals were administered in dose ranges from 10 to 40 mg CrNO₃ and 10 to 50 mg NiNO₃ kg^–1 soil. Biochemical parameters like total chlorophyll, carotenoids, protein, and proline contents were measured against metal stress. Uptake parameters, viz., bioconcentration factor (BCF), bioaccumulation coefficient (BAC), and translocation factor (TF), were also evaluated. Remediation potential of experimental plants was judged based on tolerance index (TI). All plants, when treated with Ni_10–20 and Cr₁₀ enhanced total chlorophyll and carotenoid contents. Increase in contamination and enrichment ratio caused a toxic response to plants up to some extent. Ni and Cr stress decreased the protein content and increased proline content in a concentration-dependent manner. Plant species invariably showed high TI at the lowest dose and low TI at higher doses of both heavy metals. A significant increase in Cr and Ni accumulation, coupled with a high bioaccumulation coefficient, in roots and shoots of all seven species was observed as a response to Cr and Ni stress.

进行盆栽试验以评估7种杂草植物的植物修复功效，即Bidens pilosa L.，Chenopodium album L.，Malvastrum coromandelianum L.，Garcke，Oxalis corniculata L.，Parthenium hysterophorus L.（入侵种） ，Polypogon monspeliensis L.和Rumex dentatus L.对重金属如铬（Cr）和镍（Ni）的抵抗。这些金属的剂量范围为10至40 mg CrNO ₃和10至50 mg NiNO ₃ kg ^–1土壤。测量了针对金属胁迫的生化参数，如总叶绿素，类胡萝卜素，蛋白质和脯氨酸含量。还评估了吸收参数，即生物富集系数（BCF），生物蓄积系数（BAC）和转运系数（TF）。根据耐受指数（TI）判断实验植物的修复潜力。使用Ni _10-20和Cr ₁₀处理的所有植物增强了总叶绿素和类胡萝卜素的含量。污染和富集率的增加在一定程度上引起了对植物的毒性反应。Ni和Cr胁迫以浓度依赖的方式降低了蛋白质含量并增加了脯氨酸含量。两种重金属的植物物种始终显示出最低剂量下的高TI和高剂量下的低TI。在所有七个物种的根和芽中，Cr和Ni积累的显着增加以及高的生物积累系数被视为对Cr和Ni胁迫的响应。