Alleviation of Cu and Pb Rhizotoxicities in Cowpea (Vigna unguiculata) as Related to Ion Activities at Root-Cell Plasma Membrane Surface
文献类型：期刊论文
| 作者 | Kopittke, Peter M.1,2; Kinraide, Thomas B.3; Wang, Peng4; Blarney, F. Pax C.1,2; Reichman, Suzie M.5; Menzies, Neal W.1,2 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2011-06-01 |
| 卷号 | 45期号:11页码:4966-4973 |
| ISSN号 | 0013-936X |
| DOI | 10.1021/es1041404 |
| 通讯作者 | Kopittke, Peter M.(p.kopittke@uq.edu.au) |
| 英文摘要 | Cations, such as Ca and Mg, are generally thought to alleviate toxicities of trace metals through sites-pecific competition (as incorporated in the biotic ligand model, BLM). Short-term experiments were conducted with cowpea (Vigna unguiculata L. Walp.) seedlings in simple nutrient solutions to examine the alleviation of Cu and Pb toxicities by Al, Ca, H, Mg, and Na. For Cu, the cations depolarized the plasma membrane (PM) and reduced the negativity of psi(o)(0) (electrical potential at the outer surface of the PM) and thereby decreased {Cu(2+)}(0)(o) (activity of Cu(2+) at the outer surface of the PM). For Pb, root elongation was generally better correlated to the activity of Pb(2+) in the bulk solution than to {Pb2+}(0)(o). However, we propose that the addition of cations resulted in a decrease in {Pb(2+)}(0)(o) but a simultaneous increase in the rate of Pb uptake (due to an increase in the negativity of E(m,surb) the difference in potential between the inner and outer surfaces of the PM) thus offsetting the decrease in {Pb(2+)}(0)(o). In addition, Ca was found to alleviate Pb toxicity through a specific effect. Although our data do not preclude site-specific competition (as incorporated in the BLM), we suggest that electrostatic effects have an important role. |
| 收录类别 | SCI |
| WOS关键词 | BIOTIC LIGAND MODEL ; BARLEY HORDEUM-VULGARE ; PREDICTING NICKEL TOXICITY ; LOW PH ; COPPER ; ALUMINUM ; BIOAVAILABILITY ; MAGNESIUM ; CALCIUM ; METALS |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| WOS类目 | Engineering, Environmental ; Environmental Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000291128700044 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558876 |
| 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, CRC CARE, St Lucia, Qld 4072, Australia 3.ARS, USDA, Beaver, WV 25813 USA 4.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China 5.RMIT Univ, Sch Civil Environm & Chem Engn, Melbourne, Vic 3001, Australia |
| 推荐引用方式 GB/T 7714 | Kopittke, Peter M.,Kinraide, Thomas B.,Wang, Peng,et al. Alleviation of Cu and Pb Rhizotoxicities in Cowpea (Vigna unguiculata) as Related to Ion Activities at Root-Cell Plasma Membrane Surface[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2011,45(11):4966-4973. |
| APA | Kopittke, Peter M.,Kinraide, Thomas B.,Wang, Peng,Blarney, F. Pax C.,Reichman, Suzie M.,&Menzies, Neal W..(2011).Alleviation of Cu and Pb Rhizotoxicities in Cowpea (Vigna unguiculata) as Related to Ion Activities at Root-Cell Plasma Membrane Surface.ENVIRONMENTAL SCIENCE & TECHNOLOGY,45(11),4966-4973. |
| MLA | Kopittke, Peter M.,et al."Alleviation of Cu and Pb Rhizotoxicities in Cowpea (Vigna unguiculata) as Related to Ion Activities at Root-Cell Plasma Membrane Surface".ENVIRONMENTAL SCIENCE & TECHNOLOGY 45.11(2011):4966-4973. |
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来源：南京土壤研究所
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