Co-deposition of silicon with rare earth elements (REEs) and aluminium in the fern Dicranopteris linearis from China

被引:35
作者
Liu, Wen-Shen [1 ,2 ,3 ]
Zheng, Hong-Xiang [1 ,2 ,3 ]
Guo, Mei-Na [1 ,2 ,3 ]
Liu, Chang [1 ,2 ,3 ]
Huot, Hermine [1 ,2 ,3 ]
Morel, Jean Louis [4 ]
van der Ent, Antony [4 ,5 ]
Tang, Ye-Tao [1 ,2 ,3 ]
Qiu, Rong-Liang [1 ,2 ,3 ]
机构
[1] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, Guangzhou 510275, Guangdong, Peoples R China
[3] Sun Yat Sen Univ, Guangdong Prov Engn Res Ctr Heavy Met Contaminate, Guangzhou 510275, Guangdong, Peoples R China
[4] Univ Lorraine, Lab Sols & Environm, UMR 1120, F-54518 Vandoeuvre Les Nancy, France
[5] Univ Queensland, Sustainable Minerals Inst, Ctr Mined Land Rehabil, St Lucia, Qld 4072, Australia
基金
中国国家自然科学基金;
关键词
Dicranopteris linearis; Accumulation; Co-deposition; Compartmentalization; CADMIUM ION UPTAKE; BOUND FORM; CELL-WALLS; ACCUMULATION; TOXICITY; PLANTS; SOIL; AMELIORATION; LOCALIZATION; MECHANISMS;
D O I
10.1007/s11104-019-04005-0
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
AimsDicranopteris linearis is a fern that accumulates unusually high concentrations (up to 0.3% dry weight) of rare earth elements (REEs) in China. Previously, we reported that D. linearis accumulates high concentrations of aluminium (Al) and silicon (Si) in the fronds, but the interactions between these elements and REEs were unknown.MethodsIn this study, a range of analytical techniques, including chemical extractions, Scanning-Electron Microscopy with Energy-Dispersive Spectroscopy (SEM-EDS) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) were used to study the association of REEs with Al and Si.ResultsThe results show that D. linearis accumulates high concentrations of REEs (up to 3830mgkg(-1)), Al (up to 9660mgkg(-1)) and Si (up to 20,300mgkg(-1)), with concentrations increasing with age and frond order of pinna. The extraction patterns suggest the existence of REEs-Si and Al-Si complexes. The SEM-EDS analysis confirmed the existence of phytoliths (Al) deposits in the protoplast and apoplast of the pinna cells. The upper epidermis of the pinnule and the pericycle of the midvein are more concentrated in phytoliths (Al) particles. The LA-ICP-MS analysis revealed that REEs and Al are preferentially compartmentalized within bio-inactive tissues of the pinnules, e.g. necrotic tissues (REEs) and in the margins (Al).ConclusionsCo-deposition of Si with REEs and Al may be a mechanism for dealing with the high concentrations of REEs and Al in D. linearis fronds.
引用
收藏
页码:427 / 437
页数:11
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