a Division of Molecular Science , Faculty of Science and Technology, Gunma University , Kiryu , Gunma , Japan.
Int J Phytoremediation. 2018 May 12;20(6):552-559. doi: 10.1080/15226514.2017.1393397.
Previously, it has been suggested that melanoidin-like products (MLP) from sugarcane molasses may accelerate copper phytoextraction. In this study, we evaluated the facilitatory effect of MLP on phytoextraction in a medium including cadmium or lead, the concentrations of which were adjusted around the regulation values of the Soil Contamination Countermeasures Act in Japan. Three Brassica species were tested based on their fast growth, high biomass productivity, and high heavy metal absorption. Both biomass and lead uptake in the nutrient medium with 1 mM lead nitrate were significantly increased by the addition of MLP, and almost all of the lead was accumulated in the root tissue. Therefore, MLP were able both to detoxify lead ions and to improve their bioavailability in Brassica species. In contrast, only these species with MLP or citric acid survived in the nutrient medium with 1 mM cadmium sulfate. The phytoextraction of cadmium using these species was therefore impractical under the Act.
先前有研究表明，来自甘蔗糖蜜的类黑色素产物（MLP）可能会加速铜的植物提取。在这项研究中，我们评估了 MLP 在包括镉或铅的培养基中对植物提取的促进作用，培养基中镉或铅的浓度根据日本土壤污染对策法的规定值进行了调整。根据其快速生长、高生物质生产力和高重金属吸收能力，我们测试了三种芸薹属植物。在含 1mM 硝酸铅的营养培养基中添加 MLP 可显著增加生物量和铅的吸收，并且几乎所有的铅都积累在根组织中。因此，MLP 既能使铅离子解毒，又能提高其在芸薹属植物中的生物利用度。相比之下，只有那些有 MLP 或柠檬酸的植物能够在含 1mM 硫酸镉的营养培养基中存活。因此，根据该法案，这些植物对镉的植物提取是不切实际的。
