GYIG OpenIR  > 环境地球化学国家重点实验室
Thiosulphate-induced phytoextraction of mercury in Brassica juncea: Spectroscopic investigations to define a mechanism for Hg uptake
Jianxu Wang;   Christopher W.N. Anderson;   Ying Xing;   Yuhong Fan;   Jicheng Xia;   Sabry M. Shaheen;   Jörg Rinklebe;   Xinbin Feng
2018
Source PublicationEnvironmental Pollution
Volume242Pages:986-993
Abstract

Thiosulphate is extensively used to enhance mercury (Hg) phytoextraction due to its efficient in prompting plant Hg uptake. However, the mechanism by which thiosulphate promotes Hg uptake is poorly understood. We determined the concentrations of Hg and potassium (K), and their spatial distribution, in the tissues of Brassica juncea grown in Hg-contaminated soils treated by thiosulphate and compared this to a non-treated soil (control). The spatial distribution of Hg and K was characterized using micro-X ray fluorescence spectroscopy. The subcellular localization and speciation of Hg in the root of plant treated by thiosulphate were elucidated using Transmission electron microscope coupled energy-dispersive X-ray (TEM-EDX) spectroscopy. Thiosulphate increased significantly the Hg concentration in the roots (mainly in the epidermis and xylem) and shoots (mainly in the vascular bundles), while Hg was accumulated in the root (mainly in the epidermis) of the control plant. Thiosulphate promoted the movement of Hg from the epidermis to the xylem of roots, with subsequent loading into the stem via vascular bundles. Thiosulphate decreased the K concentration in plant tissues, relative to the control plant, and we propose this is due to leakage of electrolyte from roots via increased plasma membrane permeability as a consequence of physiological damage caused by the added thiosulphate. Mercury was distributed mainly at the extracellular space in the roots and was shown by TEM-EDX to be predominately amorphous nano-clusters of HgS. We conclude that thiosulphate-promoted Hg accumulation in the plant may happen through increased plasma membrane permeability, a changed pathway of Hg movement within plants, and extracellular co-transportation of Hg-S complexes in the roots. Our results may underpin the ongoing development of phytomanagement as an environmental strategy for Hg contaminated soils around the world.

KeywordMercury phytoremediation mobilizing Agents spectroscopic Techniques plasma Membrane Permeability
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8897
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550082, Guiyang, PR China
2.University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Laboratory ofSoil- and Groundwater-Management, Pauluskirchstraße 7, 42285, Wuppertal, Germany
3.Environmental Sciences, School of Agriculture and Environment, Massey University, 4442, Palmerston North, New Zealand
4.School of Chemistry and Materials Science, Guizhou Normal University, 550002, Guiyang, China
5.University of Chinese Academy of Sciences, 100049, Beijing, China
6.University of Kafrelsheikh, Faculty of Agriculture, Department of Soil and Water Sciences, 33516, Kafr El-Sheikh, Egypt
7.University of Sejong, Department of Environment, Energy and Geoinformatics, 98 Gunja-Dong, Guangjin-Gu, Seoul, Republic of Korea
Recommended Citation
GB/T 7714
Jianxu Wang; Christopher W.N. Anderson; Ying Xing; Yuhong Fan; Jicheng Xia; Sabry M. Shaheen; Jörg Rinklebe; Xinbin Feng. Thiosulphate-induced phytoextraction of mercury in Brassica juncea: Spectroscopic investigations to define a mechanism for Hg uptake[J]. Environmental Pollution,2018,242:986-993.
APA Jianxu Wang; Christopher W.N. Anderson; Ying Xing; Yuhong Fan; Jicheng Xia; Sabry M. Shaheen; Jörg Rinklebe; Xinbin Feng.(2018).Thiosulphate-induced phytoextraction of mercury in Brassica juncea: Spectroscopic investigations to define a mechanism for Hg uptake.Environmental Pollution,242,986-993.
MLA Jianxu Wang; Christopher W.N. Anderson; Ying Xing; Yuhong Fan; Jicheng Xia; Sabry M. Shaheen; Jörg Rinklebe; Xinbin Feng."Thiosulphate-induced phytoextraction of mercury in Brassica juncea: Spectroscopic investigations to define a mechanism for Hg uptake".Environmental Pollution 242(2018):986-993.
Files in This Item:
File Name/Size DocType Version Access License
Thiosulphate-induced(2443KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Jianxu Wang; Christopher W.N. Anderson; Ying Xing; Yuhong Fan; Jicheng Xia; Sabry M. Shaheen; Jörg Rinklebe; Xinbin Feng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Jianxu Wang; Christopher W.N. Anderson; Ying Xing; Yuhong Fan; Jicheng Xia; Sabry M. Shaheen; Jörg Rinklebe; Xinbin Feng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Jianxu Wang; Christopher W.N. Anderson; Ying Xing; Yuhong Fan; Jicheng Xia; Sabry M. Shaheen; Jörg Rinklebe; Xinbin Feng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Thiosulphate-induced phytoextraction of mercury in Brassica juncea_ Spectroscopic investigations to define a mechanism for Hg uptake.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.