Regulatory Mechanisms of Nitrogen (N) on Cadmium (Cd) Uptake and Accumulation in Plants: A Review
文献类型: 外文期刊
作者: Yongjie Yang ; Jie Xiong +; Longxing Tao ; Zhenzhen Cao ; Wei Tang ; Jianping Zhang ; Xiaoyue Yu ; Guanfu Fu ; Xiufu Zhang ; Yongliang Lu *
作者机构:
关键词: Nitrogen; Cadmium; Nitrate; Ammonium; Cd-Transporting Transmembrane Proteins; Nitric Oxide
期刊名称: Science of The Total Environment
ISSN: 0048-9697
年卷期: 2020 年 708 卷
页码:
收录情况: JCR(2021版) ; EI(2021版)
摘要: Cadmium (Cd) is a heavy metal that is toxic to plants and animals. Nitrogen (N), the most significant 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 Nrampl, HMA2, and IRTI; 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. (C) 2019 Elsevier B.V. All rights reserved.
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