Department of Plant Physiology, University of Bayreuth, 95440 Bayreuth, Germany.
Trends Plant Sci. 2013 Feb;18(2):92-9. doi: 10.1016/j.tplants.2012.08.003. Epub 2012 Sep 12.
Practically all human populations are environmentally exposed to cadmium (Cd), mostly through plant-derived food. A growing body of epidemiological evidence suggests that there is no margin of safety between current Cd exposure levels and the threshold for adverse health effects and, hence, there is an urgent need to lower human Cd intake. Here we review recent studies on rice (Oryza sativa) and Cd-hyperaccumulating plants that have led to important insights into the processes controlling the passage of Cd from the soil to edible plant organs. The emerging molecular understanding of Cd uptake, root retention, root-to-shoot translocation and grain loading will enable the development of low Cd-accumulating crops.
实际上，所有人类群体都受到环境中镉（Cd）的暴露，主要通过植物源性食物。越来越多的流行病学证据表明，当前的镉暴露水平与对健康产生不利影响的阈值之间没有安全余地，因此迫切需要降低人类镉的摄入量。在这里，我们回顾了最近关于水稻（Oryza sativa）和镉超积累植物的研究，这些研究为控制镉从土壤到可食用植物器官的过程提供了重要的见解。对镉吸收、根系保留、根到茎的转运和谷物装载的分子理解的出现将使低镉积累作物的开发成为可能。
