a Academic Group of Natural Sciences and Science Education, Nanyang Technological University , Singapore.
b School of Biological Sciences, Nanyang Technological University , Singapore.
Int J Phytoremediation. 2018;20(14):1363-1368. doi: 10.1080/15226514.2016.1207599. Epub 2019 Jan 17.
Phytoremediation is an emerging technology that utilizes plants to remediate contaminated environments. In this study, Axonopus compressus (Sw.) Beauv, a fast-growing and hardy groundcover with wide geographical distribution, was exposed to soil Mo treatments ranging from 100 to 1000 mg/kg under tropical greenhouse conditions for five weeks. Generally, Mo accumulation increased as the concentration of Mo in the soil increased. The species was found to accumulate about 4000 mg/kg of Mo without exhibiting severe physiological stress at 600 mg/kg of soil Mo. Maximum accumulation of 6000 mg/kg Mo was observed at the 1000 mg/kg soil Mo treatment, though with severe necrosis and eventual plant mortality. The physiological observations, Mo accumulation behavior, and a bioconcentration factor of about 1 indicated that A. compressus could be a potential biomonitor of Mo.
植物修复是一种新兴的技术，利用植物来修复受污染的环境。在这项研究中，Axonopus compressus（Sw.）Beauv，一种生长迅速、适应性强、地理分布广泛的地被植物，在热带温室条件下，暴露于土壤钼处理浓度从 100 到 1000mg/kg 下，为期五周。通常，钼的积累随着土壤中钼浓度的增加而增加。在 600mg/kg 的土壤钼处理下，该物种积累了约 4000mg/kg 的钼，而没有表现出严重的生理胁迫。在 1000mg/kg 的土壤钼处理下，观察到最高的 6000mg/kg 的钼积累，尽管出现了严重的坏死和最终的植物死亡。生理观察、钼积累行为和生物浓缩因子约为 1 表明，A. compressus 可能是钼的潜在生物监测器。
