Organic acids promote the uptake of lanthanum by barley roots
Han, F; Shan, XQ; Zhang J(张静); Xie YN(谢亚宁); Zhang, J; Xie, YN; Pei, ZG; Zhang, SZ; Zhu, YG; Wen, B
刊名NEW PHYTOLOGIST
2005
卷号165期号:2页码:481-492
关键词barley (Hordeum vulgare) cation channel organic acids uptake of lanthanum (La) X-ray absorption spectroscopy
学科分类Plant Sciences
DOI10.1111/j.1469-8137.2004.01256.x
通讯作者Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, State Key Lab Synchrotron Radiat, Beijing 100039, Peoples R China
文章类型Article
英文摘要Organic acids play an important role in metal uptake by, and accumulation in, plants. However, the relevant mechanisms remain obscure. Acetic, malic and citric acids increased the uptake of lanthanum (La) by barley (Hordeum vulgare) roots and enhanced La content in shoots under hydroponic conditions. Concentration-dependent net La influx in the absence and presence of organic acids yielded nonsaturating kinetic curves that could be resolved into linear and saturable components. The saturable component followed Michaelis-Menten kinetics. The K-m values were similar; however, the V-max values in the presence of acetic, malic and citric acids were 4.3, 2.8, 1.5-times that of the control, respectively. Enhanced uptake of La by organic acids was mediated mainly, but not solely, by Ca2+ channels. X-ray absorption spectroscopic techniques provided evidence of La-oxygen environment and established that La(III) was coordinated to 11 oxygen atoms that are likely to be involved in the binding of La(III) to barley roots via carboxylate groups and hydration of La(III).
类目[WOS]Plant Sciences
研究领域[WOS]Plant Sciences
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语种英语
WOS记录号WOS:000226423700015
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被引频次:50[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/311005/237662
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_实验物理中心
中国科学院高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
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Han, F,Shan, XQ,Zhang J,et al. Organic acids promote the uptake of lanthanum by barley roots[J]. NEW PHYTOLOGIST,2005,165(2):481-492.
APA Han, F.,Shan, XQ.,张静.,谢亚宁.,Zhang, J.,...&Wen, B.(2005).Organic acids promote the uptake of lanthanum by barley roots.NEW PHYTOLOGIST,165(2),481-492.
MLA Han, F,et al."Organic acids promote the uptake of lanthanum by barley roots".NEW PHYTOLOGIST 165.2(2005):481-492.
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