Cadmium (Cd) accumulation in wheat (Triticum aestivum L.) and its subsequent transfer to food chain is a major environmental issue worldwide. Understanding wheat response to Cd stress and its management for aiming to reduce Cd uptake and accumulation in wheat may help to improve wheat growth and grain quality. This paper reviewed the toxic effects, tolerance mechanisms, and management of Cd stress in wheat. It was concluded that Cd decreased germination, growth, mineral nutrients, photosynthesis and grain yield of wheat and plant response to Cd toxicity varies with cultivars, growth conditions and duration of stress applied. Cadmium caused oxidative stress and genotoxicity in wheat plants. Stimulation of antioxidant defense system, osmoregulation, ion homeostasis and over production of signalling molecules are important adaptive strategies of wheat under Cd stress. Exogenous application of plant growth regulators, inorganic amendments, proper fertilization, silicon, and organic, manures and biochar, amendments are commonly used for the reduction of Cd uptake in wheat. Selection of low Cd-accumulating wheat cultivars, crop rotation, soil type, and exogenous application of microbes are among the other agronomic practices successfully employed in reducing Cd uptake by wheat. These management practices could enhance wheat tolerance to Cd stress and reduce the transfer of Cd to the food chain. However, their long-term sustainability in reducing Cd uptake by wheat needs further assessment. Copyright © 2016 Elsevier Inc. All rights reserved.

文章从环境保护部和国土资源部发布的《全国土壤污染状况调查公报》入手，指出中国耕地的重金属污染情况严重，但大部分受污染耕地都还处于中度或轻度污染程度。笔者概括归纳了与重度污染农田相比，中轻度污染农田的3个特点：仍然承载着农业生产的功能；危害性比较隐蔽；危害性常常被低估。文章结合当前的重金属污染修复技术，综述了低累积作物品种筛选的基础、取得的成果；常用的无机型、有机型、微生物型钝化剂及使用效果。提出针对中轻度重金属污染农田的2个治理策略：种植低累积、耐重金属的农作物品种；原位钝化，降低重金属的有效性。最后，笔者提出今后在中轻度重金属污染农田修复领域的一些发展方向。

探讨镉(Cd)低积累小麦不同器官Cd积累分配特性, 有助于明晰其籽粒Cd低积累机制, 对培育Cd安全小麦品种具有重要意义。通过盆栽试验, 研究了不同Cd积累类型小麦生育后期不同器官Cd积累分配特征, 并探讨节点I和颖壳滞留Cd的部分生理机制。结果表明, 不同Cd积累类型小麦成熟期不同部位Cd积累分配存在较大差异, 绵麦37节点I和颖壳Cd含量显著高于抗锈3816, 灌浆期到成熟期是绵麦37节点I和颖壳Cd积累的关键时期。Cd处理下, 不同Cd积累类型小麦节点I和颖壳亚细胞Cd分配比例均是细胞壁最大, 占70%~80%。绵麦37节点I可溶部分分配比例为18%, 抗锈3816为15%; 而绵麦37颖壳可溶部分分配比例为19%, 是抗锈3816的2.7倍, 绵麦37节点I和颖壳将更多的Cd分配在可溶部分。灌浆期, 两类小麦节点I谷胱甘肽(GSH)含量无显著差异, Cd处理下绵麦37节点I中植物螯合肽(PC)₁和PC₂的含量显著低于抗锈3816, PC₃和PC₄的含量显著高于抗锈3816, 而绵麦37颖壳中GSH、PC₁、PC₂、PC₃、PC₄含量均显著高于抗锈3816。节点I和颖壳的细胞可溶部分对Cd的固定作用和非蛋白巯基的大量合成是绵麦37籽粒Cd低积累的关键环节, 进一步探讨小麦关键器官对Cd的滞留机理对明晰小麦籽粒Cd积累机制具有重要意义。