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Translocation and transformation of selenium in hyperaccumulator plant Cardamine enshiensis from Enshi, Hubei, China

文献类型：期刊论文

作者Li, YF; Gao, YX; Zhang, W; Chen, JY; Zhao, JT; 李玉锋Cui, LW; Li B(李柏); Gao YX(高愈希); Zhang W(张伟); Chen jiuyu
刊名PLANT AND SOIL
出版日期2018
卷号425期号:43102页码:577-588
关键词Cardamine Enshiensis Selenium mu-XRF mu-XANES RP-HPLC-ICP-MS
ISSN号0032-079X
DOI10.1007/s11104-018-3587-8
文献子类Article
英文摘要Aims Cardamine enshiensis (C. enshiensis) is a selenium (Se) hyperaccumulator plant found in Enshi, a typical seleniferous area in southwestern Hubei Province, central China. The aim of this work was to investigate the translocation and transformation of Se in C. enshiensis, which may help to elucidate the mechanism on the tolerance and hyperaccumulation of Se in C. enshiensis. Methods The contents of Se in roots, shoots and leaves of C. enshiensis were measured by ICP-MS. The spatial distribution and chemical forms of Se in roots, shoots and leaves of C. enshiensis were studied using synchrotron radiation microfocused X-ray fluorescence analysis (mu-SRXRF) and in situ Se K-edge X-ray Absorption Near Edge Spectroscopy (mu-XANES). The Se species in roots, shoots and leaves were further studied by RP-HPLC-ICPMS. Results Roots, shoots and leaves of C. enshiensis contained an average of 2985, 3329 and 2491 mg/kg Se DW, respectively. mu-SRXRF found that Se was primarily located in the cortex, endodermis, and vascular cylinder in roots, while it was in the epidermis, cortex and vascular bundle of shoots and concentrated in the leaf veins and the peripheral parts. In situ mu-XANES analysis showed that the root vascular tissue contained 16% SeO42-, 19% C-Se- (using selenocystine, SeCys as model compound) and 65% C-Se-C (using methylselenocystine, MeSeCys as model compound), and shoot vascular bundle contained 10% SeO42-, 28% C-Se- and 62% C-Se-C while leaves had 84% C-Se- and 16% SeO32-. RP-HPLC-ICPMS confirmed that the major Se species were MeSeCys and SeCys. Conclusions C. enshiensis is a hyperaccumulator plant with the majority of Se in it as organic Se species like MeSeCys and SeCys. Se was translocated from roots via shoots to leaves through vascular tissues, and was deposited in the cortex and endodermis of roots, epidermis and cortex of shoots and periphery of leaves. The high concentration of organic Se species like MeSeCys suggests that C. enshiensis may be used for health promotion in people suffered from cancer and other diseases. Besides, the hyperaccumulation of Se in C. enshiensis may also identify itself to be applied for phytoremediation in Se-contaminated areas.
电子版国际标准刊号1573-5036
WOS关键词HPLC-ICP-MS ; RAY-ABSORPTION SPECTROSCOPY ; TRITICUM-AESTIVUM L. ; ORYZA-SATIVA-L. ; ENRICHED YEAST ; STANLEYA-PINNATA ; INDIAN MUSTARD ; SOIL SELENIUM ; SPECIATION ; SELENATE
WOS研究方向Agriculture ; Plant Sciences
语种英语
WOS记录号WOS:000430992300040
源URL[http://ir.ihep.ac.cn/handle/311005/285859]  
专题高能物理研究所_多学科研究中心
高能物理研究所_实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714		 Li, YF,Gao, YX,Zhang, W,et al. Translocation and transformation of selenium in hyperaccumulator plant Cardamine enshiensis from Enshi, Hubei, China[J]. PLANT AND SOIL,2018,425(43102):577-588.
APA Li, YF.,Gao, YX.,Zhang, W.,Chen, JY.,Zhao, JT.,...&Li, B.(2018).Translocation and transformation of selenium in hyperaccumulator plant Cardamine enshiensis from Enshi, Hubei, China.PLANT AND SOIL,425(43102),577-588.
MLA Li, YF,et al."Translocation and transformation of selenium in hyperaccumulator plant Cardamine enshiensis from Enshi, Hubei, China".PLANT AND SOIL 425.43102(2018):577-588.

入库方式： OAI收割

来源：高能物理研究所

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