Contamination of pre-urban arable land, by untreated municipal/industrial effluents derived heavy metals, is causing serious health hazards to human beings and abiotic components of the ecosystem. In this study, phytoremedial potential of four non-eatable floriculture plants, i.e. antirrhinum, pansy, calendula, and marigold, was explored by growing in heavy metal contaminated soil (collected from pre-urban area under untreated wastewater irrigation for more than 20 years) amended with bacterial inoculum and EDTA amended soils under greenhouse conditions for 75 days. Bacterial inoculation gave a maximum increase in the root (47.1%) and shoot (30.9%) biomass, while EDTA amendment gave 37.1 and 21.4%, respectively. However, EDTA application increases more metal concentrations in the root (65%) and shoot (36%) than that of bacterial inoculum, i.e. 37 and 27%, respectively. The values of bioconcentration factor (BCF) of all the plants for Cd, Cr, Ni and Pb were significantly increased by EDTA application and bacterial inoculum over control. The BCF values were either ≈1 or >1 in all the treatments in case of Cr. Ni and Pb. Contrarily, reduction in translocation factor (TF) values of all the flowering plants for all the metals were observed over control when the growth medium was treated with EDTA and bacterial inoculum.

中文翻译：

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植物栽培：替代性非食用植物，用于植物修复重金属污染的土壤。

未经处理的市政/工业废水衍生的重金属污染城市前的可耕地，对人类和生态系统的非生物成分造成严重的健康危害。在这项研究中，通过在重金属污染的土壤中生长（从未经处理的污水灌溉下的城市前地区收集了20年以上），探索了四种不宜食用的花卉植物，即抗大花香，三色堇，金盏花和万寿菊的植物修复潜力。在温室条件下用细菌接种物改良EDTA，在土壤条件下改良EDTA改良土壤75天。细菌接种使根部生物量最大增加（47.1％），枝条生物量最大（30.9％），而EDTA改良剂分别增加37.1％和21.4％。但是，EDTA施用比细菌接种物增加了根部（65％）和枝条（36％）的金属浓度，即 分别为37％和27％。通过施用EDTA和过度接种细菌接种物，所有植物中Cd，Cr，Ni和Pb的生物浓缩因子（BCF）值均显着增加。在Cr情况下，所有处理的BCF值均为≈1或> 1。镍和铅。相反，当用EDTA和细菌接种物处理生长培养基时，观察到所有开花植物对所有金属的转运因子（TF）值降低均超过对照。