Hasnaoui Said El, Fahr Mouna, Keller Catherine, Levard Clément, Angeletti Bernard, Chaurand Perrine, Triqui Zine El Abidine, Guedira Abdelkarim, Rhazi Laila, Colin Fabrice, Smouni Abdelaziz
Laboratoire de Biotechnologie et Physiologie Végétales, Centre de Biotechnologie Végétale et Microbienne Biodiversité et Environnement, Faculté des Sciences, Université Mohammed V de Rabat, 10000 Rabat, Morocco.
Laboratoire Mixte International Activité Minière Responsable "LMI-AMIR", IRD/UM5/INAU, 10000 Rabat, Morocco.
Plants (Basel). 2020 Oct 29;9(11):1458. doi: 10.3390/plants9111458.
Screening of native plant species from mining sites can lead to identify suitable plants for phytoremediation approaches. In this study, we assayed heavy metals tolerance and accumulation in native and dominant plants growing on abandoned Pb/Zn mining site in eastern Morocco. Soil samples and native plants were collected and analyzed for As, Cd, Cu, Ni, Sb, Pb, and Zn concentrations. Bioconcentration factor (BCF), translocation factor (TF), and biological accumulation coefficient (BAC) were determined for each element. Our results showed that soils present low organic matter content combined with high levels of heavy metals especially Pb and Zn due to past extraction activities. Native and dominant plants sampled in these areas were classified into 14 species and eight families. Principal components analysis separated with high concentrations of As, Cd, Cu, Ni, and Pb in shoots from other species. Four plant species, namely, , , , and showed strong capacity to tolerate and hyperaccumulate heavy metals, especially Pb, in their tissues. According to BCF, TF, and BAC, these plant species could be used as effective plants for Pb phytoextraction. and are better suited for phytostabilization of Cd/Cu and Cu/Zn, respectively. Our study shows that several spontaneous and native plants growing on Pb/Zn contaminated sites have a good potential for developing heavy metals phytoremediation strategies.
对矿区本土植物物种进行筛选有助于确定适用于植物修复方法的植物。在本研究中，我们测定了摩洛哥东部废弃铅锌矿场上本土优势植物对重金属的耐受性和积累情况。采集了土壤样本和本土植物，并分析了其中砷、镉、铜、镍、锑、铅和锌的浓度。测定了每种元素的生物富集系数（BCF）、转运系数（TF）和生物积累系数（BAC）。我们的结果表明，由于过去的开采活动，土壤有机质含量低，重金属含量高，尤其是铅和锌。在这些地区采集的本土优势植物分为14个物种和8个科。主成分分析将地上部分砷、镉、铜、镍和铅浓度高的物种与其他物种区分开来。四种植物，即[此处原文缺失植物名称]，表现出在其组织中耐受和超积累重金属尤其是铅的强大能力。根据BCF、TF和BAC，这些植物物种可作为铅植物提取的有效植物。[此处原文缺失植物名称]和[此处原文缺失植物名称]分别更适合镉/铜和铜/锌的植物稳定化。我们的研究表明，生长在铅锌污染场地的几种自发本土植物具有开发重金属植物修复策略的良好潜力。
