Calculated activity of Mn2+ at the outer surface of the root cell plasma membrane governs Mn nutrition of cowpea seedlings
文献类型：期刊论文
| 作者 | Kopittke, Peter M.1,2; Blamey, F. Pax C.1; Wang, Peng3,4; Menzies, Neal W.1,2 |
| 刊名 | JOURNAL OF EXPERIMENTAL BOTANY
 |
| 出版日期 | 2011-07-01 |
| 卷号 | 62期号:11页码:3993-4001 |
| 关键词 | Manganese nutrition manganese toxicity plasma membrane surface potential root growth tissue concentration |
| ISSN号 | 0022-0957 |
| DOI | 10.1093/jxb/err097 |
| 通讯作者 | Kopittke, Peter M.(p.kopittke@uq.edu.au) |
| 英文摘要 | Manganese (Mn) is an essential micronutrient for plant growth but is often toxic in acid or waterlogged soils. Using cowpea (Vigna unguiculata L. Walp.) grown with 0.05-1500 mu M Mn in solution, two short-term (48 h) solution culture experiments examined if the effects of cations (Ca, Mg, Na, Al, or H) on Mn nutrition are related to the root cells' plasma membrane (PM) surface potential, epsilon00. When grown in solutions containing levels of Mn that were toxic, both relative root elongation rate (RRER) and root tissue Mn concentration were more closely related to the activity of Mn2+ at the outer surface of the PM, {Mn2+}00 (R-2=0.812 and 0.871) than to its activity in the bulk solution, {Mn2+}(b) (R-2=0.673 and 0.769). This was also evident at lower levels of Mn (0.05-10 mu M) relevant to studies investigating Mn as an essential micronutrient (R-2=0.791 versus 0.590). In addition, changes in the electrical driving force for ion transport across the PM influenced both RRER and the Mn concentration in roots. The {Mn2+}(b) causing a 50% reduction in root growth was found to be c. 500 to > 1000 mu M (depending upon solution composition), whilst the corresponding value was 3300 mu M when related to {Mn2+}00. Although specific effects such as competition are not precluded, the data emphasize the importance of non-specific electrostatic effects in the Mn nutrition of cowpea seedlings over a 1x10(5)-fold range of Mn concentration in solution. |
| 收录类别 | SCI |
| WOS关键词 | BIOTIC LIGAND MODEL ; SOLUTION CULTURE ; ION UPTAKE ; MANGANESE ; PHYTOTOXICITY ; ALUMINUM ; MAGNESIUM ; TOXICITY ; CALCIUM ; GROWTH |
| WOS研究方向 | Plant Sciences |
| WOS类目 | Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000292838700025 |
| 出版者 | OXFORD UNIV PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558912 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Kopittke, Peter M. |
| 作者单位 | 1.Univ Queensland, Sch Agr & Food Sci, St Lucia, Qld 4072, Australia 2.Univ Queensland, Cooperat Res Ctr Contaminat Assessment & Remediat, St Lucia, Qld 4072, Australia 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 4.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 | Kopittke, Peter M.,Blamey, F. Pax C.,Wang, Peng,et al. Calculated activity of Mn2+ at the outer surface of the root cell plasma membrane governs Mn nutrition of cowpea seedlings[J]. JOURNAL OF EXPERIMENTAL BOTANY,2011,62(11):3993-4001. |
| APA | Kopittke, Peter M.,Blamey, F. Pax C.,Wang, Peng,&Menzies, Neal W..(2011).Calculated activity of Mn2+ at the outer surface of the root cell plasma membrane governs Mn nutrition of cowpea seedlings.JOURNAL OF EXPERIMENTAL BOTANY,62(11),3993-4001. |
| MLA | Kopittke, Peter M.,et al."Calculated activity of Mn2+ at the outer surface of the root cell plasma membrane governs Mn nutrition of cowpea seedlings".JOURNAL OF EXPERIMENTAL BOTANY 62.11(2011):3993-4001. |
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来源：南京土壤研究所
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