Department of Biology, Faculty of Science and Techniques, University of Sultan Moulay Slimane, Beni-Mellal, Morocco.
1GreenUPorto - Sustainable Agrifood Production Research Centre & Department of Biology, 8 Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, 4169-007, Porto, Portugal.
Environ Sci Pollut Res Int. 2021 Apr;28(13):15782-15793. doi: 10.1007/s11356-020-11494-5. Epub 2020 Nov 26.
The contamination left by abandoned mines demands sustainable mitigation measures. Hence, the aim of this study was to examine the phytoremediator ability of Eucalyptus globulus Labill. to be used for cleaning up metal-contaminated soils from an African abandoned iron (Fe) mine (Ait Ammar, Oued Zem, Morocco). Plantlets of this species were exposed to a control (CTL), a reference (REF), and a mine-contaminated soil (CS). Morphological (growth, leaf area) and physiological stress biomarkers (photosynthetic efficiency, pigments content, leaf relative water, and malondialdehyde (MDA) levels) and metal bioaccumulation were assessed. The growth and leaf area of E. globulus increased overtime in all soils, although at a lower rate in the CS. Its photosynthetic efficiency was not markedly impaired, as well as MDA levels decreased throughout the experiment in CS. In this soil, higher metal contents were detected in E. globulus roots than in leaves, especially Fe (roots: 15.98-213.99 μg g; leaves: 5.97-15.98 μg g) and Zn (roots: 1.64-1.99 μg g; leaves: 0.67-1.19 μg g), indicating their reduced translocation. Additionally, though at low extent, the plants bioaccumulated some metals (Pb > Zn > Cu) from CS. Overall, E. globulus may be potentially used for the phytoremediation of metals in metal-contaminated soils.
废弃矿山遗留的污染需要可持续的缓解措施。因此，本研究旨在检验桉树（Eucalyptus globulus Labill.）作为一种植物修复剂，用于修复非洲废弃铁矿（Ait Ammar，Oued Zem，摩洛哥）污染土壤中的金属。将该物种的植物幼苗暴露于对照（CTL）、参照（REF）和矿区污染土壤（CS）中。评估了植物的形态（生长、叶面积）和生理应激生物标志物（光合效率、色素含量、叶片相对水含量和丙二醛（MDA）水平）以及金属的生物积累。桉树的生长和叶面积在所有土壤中随时间推移而增加，尽管在 CS 中增加的速度较慢。其光合效率没有明显受损，同时 MDA 水平在 CS 中整个实验过程中均下降。在该土壤中，桉树根部的金属含量高于叶片，尤其是铁（根部：15.98-213.99μg/g；叶片：5.97-15.98μg/g）和锌（根部：1.64-1.99μg/g；叶片：0.67-1.19μg/g），表明其迁移减少。此外，尽管程度较低，但植物从 CS 中生物积累了一些金属（Pb＞Zn＞Cu）。总体而言，桉树可能可用于修复金属污染土壤中的金属。
