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Direct measurement of lanthanum uptake and distribution in internodal cells of Chara
Li ZJ(李子杰); Zhang ZY(张智勇); Jiang WJ(姜文君); Zhao YL(赵宇亮); Chai ZF(柴之芳); Li, ZJ; Zhang, ZY; Jiang, WJ; Yu, M; Zhou, YL; Zhao, YL; Chai, ZF
Source PublicationPLANT SCIENCE
Corresponding Author[Li, Zijie ; Zhang, Zhiyong ; Jiang, Wenjun ; Zhao, Yuliang ; Chai, Zhifang] Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Analyt Tech, Beijing 100049, Peoples R China ; [Li, Zijie ; Jiang, Wenjun] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China ; [Yu, Ming ; Zhou, Yunlong] Beijing Normal Univ, Sch Life Sci, Beijing 100875, Peoples R China
AbstractRare earth elements (REEs) influence many physiological processes in plants, but the mechanism is still unknown. The question of whether REEs can enter plant cells is crucial in assessing the biological effects of REEs. In this paper, a method for determination of REE lanthanum (La) in ultratrace level in cell contents of giant algal cells was established. The uptake and subcellular distribution of La in internodal cells of Chara corallina were investigated. After incubation with 6 mu M LaCl3 for 72 h, about 0.523% of total lanthanum in the whole cell was internalized. Approximately 55% of the total intracellular lanthanum was in the cytoplasm, and lanthanum concentration in the cytoplasm was much higher than that in the vacuole. The concentration dependence of La3+ uptake occurred in a biphasic manner, which was tentatively attributed to the operation of two separate transport systems, a high-affinity system which is saturated at 10 mu M and a low affinity system which showed a linear dependence on concentration up to at least 100 mu M. Only the high-affinity system was studied in detail. Effects of channel activator, blocker and metabolic inhibition on lanthanum uptake through this system were investigated. The results suggest that lanthanum transport across plasma membrane was a metabolically mediated process and membrane potential difference was independent of lanthanum uptake. (C) 2008 Elsevier Ireland Ltd. All rights reserved.
KeywordChara corallina distribution ICP-MS lanthanum uptake
Subject AreaBiochemistry & Molecular Biology; Plant Sciences
WOS Research AreaBiochemistry & Molecular Biology ; Plant Sciences
WOS SubjectBiochemistry & Molecular Biology ; Plant Sciences
WOS IDWOS:000255313800002
Citation statistics
Document Type期刊论文
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Li ZJ,Zhang ZY,Jiang WJ,et al. Direct measurement of lanthanum uptake and distribution in internodal cells of Chara[J]. PLANT SCIENCE,2008,174(5):496-501.
APA 李子杰.,张智勇.,姜文君.,赵宇亮.,柴之芳.,...&Chai, ZF.(2008).Direct measurement of lanthanum uptake and distribution in internodal cells of Chara.PLANT SCIENCE,174(5),496-501.
MLA 李子杰,et al."Direct measurement of lanthanum uptake and distribution in internodal cells of Chara".PLANT SCIENCE 174.5(2008):496-501.
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