Abstract
Cadmium (Cd) is a heavy metal that is toxic to plants and animals. Nitrogen (N), the mostsignificant macro-nutrient and a common input for crop production, is often excessively applied than plants’ demands by farmers to obtain more economic benefits. Understanding the regulatory mechanisms of N that control Cd uptake, translocation, and accumulation may enable the development of solutions regarding Cd pollution in the trophic chain, a major and global threat to agricultural sustainability and human health. In this review, we clarified that an increased amount of N, regardless of its form, enhances Cd uptake, translocation, and accumulation in plants, and nitrate promotes Cd uptake more than any other N form. We also described that N fertilizer alters the Cd exchange capacity and the bio-available Cd content in soil; regulates nitric oxide induced divalent cation gene expression of Nramp1, HMA2, and IRT1; and changes cell wall isolation, chelation capacity, and oxidative resistance to regulate Cd accumulation in plants. By revealing the integrated interaction effects between Cd accumulation and N fertiliser use, we propose new challenges to investigate the functions and mechanisms of N in Cd-contaminated croplands and develop suitable N-fertilisation protocols to practically reduce food health risks in agricultural food production.
Copyright © 2003-2019 China National Rice Research Institute. 中国水稻研究所 版权所有
地址：杭州市富阳区水稻所路28号（邮政编码：311401）电话：+86 571 63370590
杭州市拱墅区体育场路359号（邮政编码：310006）
京ICP备10039560号-5 浙公网安备33010302000429号
技术支持：中国农业科学院农业信息研究所