Fractionation of Rare Earth Elements in Plants Ⅰ. Fractionation Patterns and Their Forming Mechanisms in Different Organs of Triticum Aestivum

作     者：梁涛 丁士明 张朝生 张自立 阎军才 李海涛 

作者机构：Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Department of Geography and Environmental Change Institute National University of Ireland Galway Ireland Department of Soil and Agrichemistry Anhui Agricultural University Hefei 230036China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2005年第23卷第2期

页      面：224-229页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071009[理学-细胞生物学] 09[农学] 0901[农学-作物学] 090102[农学-作物遗传育种] 

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina(40232022)andFrontprojectofInstitute ofGeographicalSciencesandNaturalResourcesResearch CAS(CXIOG A02 04) 

主　　题：fractionation lanthanides tetrad effect Triticum aestivum rare earths 

摘      要：Fractionations of rare earth elements (REEs) and the forming mechanisms in plants were studied using Triticum aestivum as plant material with application of exogenous REEs and hydroponic culture. REEs were significantly fractionated in different parts of Triticum aestivum. M-type tetrad effect could be observed in both root and shoot of Triticum aestivum, which might result from the different abilities of REEs to form phosphate precipitation. Middle REEs (MREEs), light REEs (LREEs) and heavy REEs (HREEs) were enriched in root, stem and leaf of Triticum aestivum, respectively. REE speciation calculations using VMINTEQ program show REEs in simulated xylem solution mainly exist as REE-EDTA^(- )and RE^(3+), but only HREEs are enriched in REE-EDTA^(-), while LREEs are enriched in the other REE species. It is suggested that the fractionation between LREEs and HREEs might be caused by the uptake of REE-EDTA^(-) in Triticum aestivum leaves, but might result from the uptake of the other REE species in their stems.