Cerium toxicity,uptake and translocation in Arabidopsis thaliana seedlings
来源期刊：Journal of Rare Earths2012年第6期
论文作者：王学 林有升 刘东武 徐恒戬 刘涛 赵凤云
文章页码：579 - 585
摘 要：Arabidopsis thaliana seedlings were cultivated in 0-500μmol/L of extraneous cerium（Ce）for 7 d to investigate the toxicity,uptake and translocation of rare earth elements（REEs）.The results showed that Ce could be largely absorbed by the roots of A.thaliana and translocated to the shoots.But the uptake rates of Ce by the roots were much higher than the translocation rates from roots to shoots.Ultra-structural analysis revealed that Ce was mainly distributed on the cell wall.At higher concentration,Ce could also enter cell,destroy the ultra-structure of cells and disturb the intrinsic balance of nutrient elements of A.thaliana.Addition of Ce（50-500μmol/L）to the culture medium significantly inhibited the elongation of primary roots,decreased chlorophyll content,rosette diameter and fresh mass of plants.The damage increased with the increase of Ce concentration in culture medium,although primary root elongation,chlorophyll content,and rosette diameter were stimulated by relatively low concentration（0.5μmol/L）of Ce.Thus,it is speculated that REEs may become a new type contamination if we don’t well control the release of REEs into the environment.
王学1，林有升1，刘东武2，徐恒戬1，刘涛1，赵凤云1
1. School of Life Sciences,Shandong University of Technology2. Analysis and Testing Center,Shandong University of Technology
摘 要：Arabidopsis thaliana seedlings were cultivated in 0-500μmol/L of extraneous cerium（Ce）for 7 d to investigate the toxicity,uptake and translocation of rare earth elements（REEs）.The results showed that Ce could be largely absorbed by the roots of A.thaliana and translocated to the shoots.But the uptake rates of Ce by the roots were much higher than the translocation rates from roots to shoots.Ultra-structural analysis revealed that Ce was mainly distributed on the cell wall.At higher concentration,Ce could also enter cell,destroy the ultra-structure of cells and disturb the intrinsic balance of nutrient elements of A.thaliana.Addition of Ce（50-500μmol/L）to the culture medium significantly inhibited the elongation of primary roots,decreased chlorophyll content,rosette diameter and fresh mass of plants.The damage increased with the increase of Ce concentration in culture medium,although primary root elongation,chlorophyll content,and rosette diameter were stimulated by relatively low concentration（0.5μmol/L）of Ce.Thus,it is speculated that REEs may become a new type contamination if we don’t well control the release of REEs into the environment.
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