a Department of Plant Sciences , University of Hyderabad, School of Life Sciences , Hyderabad , Telangana , India.
Int J Phytoremediation. 2019;21(2):120-128. doi: 10.1080/15226514.2018.1474442. Epub 2019 Feb 7.
Aquatic macrophytes play an important role in the removal of toxic metals from wastewater. Therefore, the induction of Fe plaque on the roots, and its consequences on Cd tolerance investigated in an aquatic macrophyte Pistia stratiotes L. The presence of Fe ion but not Fe resulted in Fe plaque formation. Induction of Fe plaque decreased Ca and increased K and Fe accumulations in the root. Plaque formed plants had accumulated less Cd until 50.0 µM CdCl treatments because plaque acted as a barrier to Cd exposure. However, at higher concentrations (500.0 µM CdCl), plaque formed plants contained more Cd in the roots. Cadmium inducible ion leakage in the root and lowering of the photosynthetic pigment content were less in plants with a plaque. Stretching of aromatic carbonyl groups and alkyl groups among plaque formed plants upon Cd treatments indicated the putative role of phenolics in Cd detoxification.
水生植物在去除废水中的有毒金属方面发挥着重要作用。因此，本研究在一种水生植物水蕹菜（Pistia stratiotes L.）中诱导根表铁帽的形成，并研究其对镉耐性的影响。结果表明，只有铁离子而不是铁本身导致了铁帽的形成。铁帽的诱导降低了钙的积累，增加了钾和铁的积累。在 50.0µM CdCl2 处理条件下，形成铁帽的植物积累的镉较少，因为铁帽起到了阻止镉暴露的作用。然而，在更高的浓度（500.0µM CdCl2）下，形成铁帽的植物根中积累了更多的镉。根中镉诱导的离子渗漏和光合色素含量的降低在有铁帽的植物中较少。在镉处理下，形成铁帽的植物中芳香羰基和烷基的伸展表明了酚类物质在镉解毒中的潜在作用。
