Dong Qin, Xu PeiXian, Wang ZhaoLong
School of Agriculture and Biology, Shanghai Jiao Tong University Shanghai, China.
School of Agriculture and Biology, Shanghai Jiao Tong UniversityShanghai, China; Shanghai Administration Department of Green CityShanghai, China.
Front Plant Sci. 2017 Feb 3;8:113. doi: 10.3389/fpls.2017.00113. eCollection 2017.
Phytoremediation efficiency mainly depends upon mechanisms in the uptake and translocation of soil contaminants. Cadmium (Cd) distribution and translocation in roots and shoots of tall fescue () and Kentucky bluegrass () were observed using fluorescence spectroscopy with a laser confocal scanning microscope. No difference in root Cd accumulations was detected between these two turfgrass species. Kentucky bluegrass transported more Cd into the stele for root-to-shoot translocation and resulted in significantly higher Cd concentration in leaves. In tall fescue, less Cd was transported into the stele in roots and more Cd was excreted to the cuticle layer in leaves. These results suggested that both turfgrass species were hypertolerant to Cd through distinct distribution patterns in leaves and roots.
植物修复效率主要取决于土壤污染物吸收和转运的机制。使用激光共聚焦扫描显微镜的荧光光谱法观察了镉（Cd）在高羊茅（）和草地早熟禾（）的根和地上部中的分布及转运情况。在这两种草坪草种之间未检测到根中镉积累的差异。草地早熟禾将更多的镉转运到中柱以进行根到地上部的转运，导致叶片中镉浓度显著更高。在高羊茅中，较少的镉被转运到根的中柱，更多的镉被排泄到叶片的角质层。这些结果表明，这两种草坪草种通过叶和根中不同的分布模式对镉具有超耐受性。
