The surface charge density of plant cell membranes (sigma): an attempt to resolve conflicting values for intrinsic sigma
文献类型：期刊论文
| 作者 | Kinraide, Thomas B.1; Wang, Peng2 |
| 刊名 | JOURNAL OF EXPERIMENTAL BOTANY
 |
| 出版日期 | 2010-05-01 |
| 卷号 | 61期号:9页码:2507-2518 |
| 关键词 | Charge density membrane plant surface potential xi potential |
| ISSN号 | 0022-0957 |
| DOI | 10.1093/jxb/erq082 |
| 通讯作者 | Kinraide, Thomas B.(tom.kinraide@ars.usda.gov) |
| 英文摘要 | The electrical potentials at membrane surfaces (psi(0)) strongly influence the physiological responses to ions. Ion activities at membrane surfaces may be computed from psi(0), and physiological responses to ions are better interpreted with surface activities than with bulk-phase activities. psi(0) influences the gating of ion channels and the driving force for ion fluxes across membranes. psi(0) may be computed with electrostatic models incorporating the intrinsic surface charge density of the membrane (sigma(0)), the ion composition of the bathing medium, and ion binding to the membrane. Some of the parameter values needed for the models are well established: the equilibrium constants for ion binding were confirmed for several ions using multiple approaches, and a method is proposed for the computation of other binding constants. sigma(0) is less well established, although it has been estimated by several methods, including computation from the near-surface electrical potentials [zeta (xi) potentials] measured by electrophoreses. Computation from xi potentials yields values in the range -2 mC m(-2) to -8 mC m(-2), but other methods yield values in the range -15 mC m(-2) to -40 mC m(-2). A systematic discrepancy between measured and computed xi potentials was noted. The preponderance of evidence supports the suitability of sigma(0)= -30 mC m(-2). A proposed, fully paramatized Gouy-Chapman-Stern model appears to be suitable for the interpretation of many plant responses to the ionic environment. |
| 收录类别 | SCI |
| WOS关键词 | PLASMA-MEMBRANE ; 9-AMINOACRIDINE FLUORESCENCE ; WHEAT ROOT ; ZETA-POTENTIALS ; PROTOPLASTS ; VESICLES ; ALUMINUM ; ION ; PHYTOTOXICITY ; SORPTION |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000279003600025 |
| 出版者 | OXFORD UNIV PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558829 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Kinraide, Thomas B. |
| 作者单位 | 1.ARS, Appalachian Farming Syst Res Ctr, USDA, Beaver, WV 25813 USA 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kinraide, Thomas B.,Wang, Peng. The surface charge density of plant cell membranes (sigma): an attempt to resolve conflicting values for intrinsic sigma[J]. JOURNAL OF EXPERIMENTAL BOTANY,2010,61(9):2507-2518. |
| APA | Kinraide, Thomas B.,&Wang, Peng.(2010).The surface charge density of plant cell membranes (sigma): an attempt to resolve conflicting values for intrinsic sigma.JOURNAL OF EXPERIMENTAL BOTANY,61(9),2507-2518. |
| MLA | Kinraide, Thomas B.,et al."The surface charge density of plant cell membranes (sigma): an attempt to resolve conflicting values for intrinsic sigma".JOURNAL OF EXPERIMENTAL BOTANY 61.9(2010):2507-2518. |
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来源：南京土壤研究所
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