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Effects of rare earth ions on activity of RuBPcase in tobacco
Chen, WJ; Gu, YH; Zhao, GW; Tao, Y; Luo, JP; Hu, TD; Tao Y(陶冶); Hu TD(胡天斗)
2000
发表期刊PLANT SCIENCE
卷号152期号:2页码:#REF!
通讯作者Chen, WJ (reprint author), Univ Sci & Technol China, Sch Life Sci, Hefei 230026, Peoples R China.
文章类型Article
摘要To investigate the physiological effects of rare earth ions, we have studied the effect of LaCl3 on the activity of ribulose 1,5-bisphosphate carboxylase (RuBPcase) in tobacco (Nicotiana tobacum). When treated with 20-80 mu mol/l LaCl3 in Hoagland solution by water culture or by spraying with 400-1600 mu mol/l LaC(l)3 in pot experiment, the total and initial activities of RuBPcase were raised gradually, but decreased when the concentrations of LaCl3 were greater than or equal to 200 mu mol/l in water culture and > 1600 mu mol/l by spraying. it was indicated that LaCl3 promoted the activation of RuBPcase at low concentrations in vivo. It was also proved that lanthanides (Ln(3+)) increased the activity of RuBPcase in vitro. Upon addition of different concentrations of Ln(3+) to replace Mg2+, the RuBPcase activity exhibited an apparently biphasic response curve. Among the three Ln(3+) tested, the activation effects of La3+ and Ce3+ on RuBPcase were greater than that of Gd3+, but the activation effects of all the three Ln(3+) were lower at high concentrations than that of Mg2+, showing strongly inhibitory function. The extended X-ray absorption fine structure study of ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco)-La complex indicated that La is bound with the oxygen atoms of amino acid residues, with the distance of the La-O bond being 2.51 Angstrom. The mechanism of molecular interaction between Ln(3+) and RuBPcase is discussed. (C) 2000 Published by Elsevier Science Ireland Ltd. All rights reserved.
关键词rare earth ions RuBPcase tobacco
学科领域Biochemistry & Molecular Biology; Plant Sciences
DOI10.1016/S0168-9452(99)00235-6
收录类别SCI
WOS类目Biochemistry & Molecular Biology ; Plant Sciences
WOS记录号WOS:000085408900005
引用统计
被引频次:34[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226490
专题多学科研究中心
推荐引用方式
GB/T 7714
Chen, WJ,Gu, YH,Zhao, GW,et al. Effects of rare earth ions on activity of RuBPcase in tobacco[J]. PLANT SCIENCE,2000,152(2):#REF!.
APA Chen, WJ.,Gu, YH.,Zhao, GW.,Tao, Y.,Luo, JP.,...&胡天斗.(2000).Effects of rare earth ions on activity of RuBPcase in tobacco.PLANT SCIENCE,152(2),#REF!.
MLA Chen, WJ,et al."Effects of rare earth ions on activity of RuBPcase in tobacco".PLANT SCIENCE 152.2(2000):#REF!.
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