Plasma Membrane Surface Potential: Dual Effects upon Ion Uptake and Toxicity
文献类型：期刊论文
| 作者 | Wang, Peng1,6; Kinraide, Thomas B.2; Zhou, Dongmei1; Kopittke, Peter M.3; Peijnenburg, Willie J. G. M.4,5 |
| 刊名 | PLANT PHYSIOLOGY
 |
| 出版日期 | 2011-02-01 |
| 卷号 | 155期号:2页码:808-820 |
| ISSN号 | 0032-0889 |
| DOI | 10.1104/pp.110.165985 |
| 通讯作者 | Zhou, Dongmei(dmzhou@issas.ac.cn) |
| 英文摘要 | Electrical properties of plasma membranes (PMs), partially controlled by the ionic composition of the exposure medium, play significant roles in the distribution of ions at the exterior surface of PMs and in the transport of ions across PMs. The effects of coexisting cations (commonly Al3+, Ca2+, Mg2+, H+, and Na+) on the uptake and toxicity of these and other ions (such as Cu2+, Zn2+, Ni2+, Cd2+, and H2AsO4-) to plants were studied in terms of the electrical properties of PMs. Increased concentrations of cations or decreased pH in rooting media, whether in solution culture or in soils, reduced the negativity of the electrical potential at the PM exterior surface (psi(0)(0)). This reduction decreased the activities of metal cations at the PM surface and increased the activities of anions such as H2AsO4-. Furthermore, the reduced psi(0)(0) negativity increased the surface-to-surface transmembrane potential difference, thus increasing the electrical driving force for cation uptake and decreasing the driving force for anion uptake across PMs. Analysis of measured uptake and toxicity of ions using electrostatic models provides evidence that uptake and toxicity are functions of the dual effects of psi(0)(0) (i.e. altered PM surface ion activity and surface-to-surface transmembrane potential difference gradient). This study provides novel insights into the mechanisms of plant-ion interactions and extends current theory to evaluate ion bioavailability and toxicity, indicating its potential utility in risk assessment of metal(loid)s in natural waters and soils. |
| 收录类别 | SCI |
| WOS关键词 | BARLEY HORDEUM-VULGARE ; BIOTIC LIGAND MODEL ; ELECTRICAL POTENTIALS ; ROOT ELONGATION ; CELL-WALLS ; WHEAT ; CALCIUM ; BIOAVAILABILITY ; PHYTOTOXICITY ; COPPER |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000286880800015 |
| 出版者 | AMER SOC PLANT BIOLOGISTS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559040 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhou, Dongmei |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China 2.ARS, Appalachian Farming Syst Res Ctr, USDA, Beaver, WV 25813 USA 3.Univ Queensland, Sch Land Crop & Food Sci, St Lucia, Qld 4072, Australia 4.Leiden Univ, Fac Sci, NL-2300 RA Leiden, Netherlands 5.Natl Inst Publ Hlth & Environm, NL-3720 Bilthoven, Netherlands 6.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Peng,Kinraide, Thomas B.,Zhou, Dongmei,et al. Plasma Membrane Surface Potential: Dual Effects upon Ion Uptake and Toxicity[J]. PLANT PHYSIOLOGY,2011,155(2):808-820. |
| APA | Wang, Peng,Kinraide, Thomas B.,Zhou, Dongmei,Kopittke, Peter M.,&Peijnenburg, Willie J. G. M..(2011).Plasma Membrane Surface Potential: Dual Effects upon Ion Uptake and Toxicity.PLANT PHYSIOLOGY,155(2),808-820. |
| MLA | Wang, Peng,et al."Plasma Membrane Surface Potential: Dual Effects upon Ion Uptake and Toxicity".PLANT PHYSIOLOGY 155.2(2011):808-820. |
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来源：南京土壤研究所
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