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Nickel hyperaccumulation mechanisms: a review on the current state of knowledge

文献类型： 外文期刊

作者： Deng, Teng-Hao-Bo 1 ; van der Ent, Antony 2 ; Tang, Ye-Tao 4 ; Sterckeman, Thibault 3 ; Echevarria, Guillaume 3 ; M 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Publ Monitoring Ctr Agroprod, Guangzhou 510275, Guangdong, Peoples R China

2.Univ Queensland, Sustainable Minerals Inst, Ctr Mined Land Rehabil, St Lucia, Qld 4072, Australia

3.Univ Lorraine, INRA, Lab Sols & Environm, 2 Ave Foret Haye,TSA 40602, F-54518 Vandoeuvre Les Nancy, France

4.Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China

5.Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou 510275, Guangdong, Peoples R China

6.Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou 510275, Guangdong, Peop

关键词： Nickel; Hyperaccumulator; Root uptake; Phloem translocation

期刊名称：PLANT AND SOIL （ 影响因子：4.192； 五年影响因子：4.712 ）

ISSN： 0032-079X

年卷期： 2018 年 423 卷 1-2 期

页码：

收录情况： SCI

摘要： Hyperaccumulator plants are unusual plants that accumulate particular metals or metalloids, such as nickel, zinc, cadmium and arsenic, in their living tissues to concentrations that are hundreds to thousands of times greater than what is normal for most plants. The hyperaccumulation phenomenon is rare (exhibited by less than 0.2% of all angiosperms), with most of the similar to 500 hyperaccumulator species known globally for nickel. This review highlights the contemporary understanding of nickel hyperaccumulation processes, which include root uptake and sequestration, xylem loading and transport, leaf compartmentation and phloem translocation processes. Hyperaccumulator plants have evolved highly efficient physiological mechanisms for taking up nickel in their roots followed by rapid translocation and sequestration into the aerial shoots. The uptake of nickel is mainly involved with low affinity transport systems, presumably from the ZIP family. The presence of high concentrations of histidine prevents nickel sequestration in roots. Nickel is efficiently loaded into the xylem, where it mainly presents as Ni2+. The leaf is the main storage organ, which sequestrates nickel in non-active sites, e.g. vacuoles and apoplast. Recent studies show that phloem translocates high levels of nickel, which has a strong impact on nickel accumulation in young growing tissues.

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