TOXICITY OF METALS TO ROOTS OF COWPEA IN RELATION TO THEIR BINDING STRENGTH
文献类型：期刊论文
| 作者 | Kopittke, Peter M.1,2; Blamey, F. Pax C.1,2; McKenna, Brigid A.1; Wang, Peng3,4; Menzies, Neal W.1,2 |
| 刊名 | ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
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| 出版日期 | 2011-08-01 |
| 卷号 | 30期号:8页码:1827-1833 |
| 关键词 | Binding Metal rhizotoxicity Plasma membrane activity Relative toxicity Root growth |
| ISSN号 | 0730-7268 |
| DOI | 10.1002/etc.557 |
| 通讯作者 | Kopittke, Peter M.(p.kopittke@uq.edu.au) |
| 英文摘要 | Metal phytotoxicity is important in both environmental and agricultural systems. A solution culture study examined the toxicity of 26 metals to roots of cowpea (Vigna unguiculata (L.) Walp.); new data were collected for 15 metals and published data for 11 metals. Metal toxicity, calculated as causing a 50% reduction in root elongation rate, was determined based on either the measured concentration in the bulk solution (EC50(b)) or the calculated activity at the outer surface of the plasma membrane (EA50(0)degrees). The EC50(b) values ranged from 0.007 mu M for Tl to 98,000 mu M for K, with the order of rhizotoxicity to cowpea, from most to least toxic, being Tl = Ag > Cu > Hg = Ni = Ga = Ru = In > Sc = Cd = Gd = La = Co = Cs = Pb > Zn = Al = H > Mn > Ba = Sr > Li > Mg > Ca = Na > K. The EA50(0)degrees values suggest that the binding of metals to hard ligands is an important, general, nonspecific mechanism of toxicity, a hypothesis supported by the similar toxicity symptoms to roots of cowpea by many metals. However, additional mechanisms, such as strong binding to soft ligands, substantially increase rhizotoxicity of some metals, especially Tl, Ag, and Cs. Besides direct toxic effects, osmotic effects or reduced activity of Ca(2+) at the outer surface of the root plasma membrane (and resultant Ca deficiency) may decrease short-term root growth. Environ. Toxicol. Chem. 2011;30:1827-1833. (C) 2011 SETAC |
| 收录类别 | SCI |
| WOS关键词 | ION ; ALUMINUM ; SURFACE ; SEEDLINGS ; CALCIUM ; GROWTH ; PHYTOTOXICITY ; MULTIPLE ; PECTIN ; CHARGE |
| WOS研究方向 | Environmental Sciences & Ecology ; Toxicology |
| WOS类目 | Environmental Sciences ; Toxicology |
| 语种 | 英语 |
| WOS记录号 | WOS:000293060900012 |
| 出版者 | WILEY-BLACKWELL |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558954 |
| 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, Australia 2.Cooperat Res Ctr Contaminat Assessment & Remediat, Salisbury S, SA, Australia 3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kopittke, Peter M.,Blamey, F. Pax C.,McKenna, Brigid A.,et al. TOXICITY OF METALS TO ROOTS OF COWPEA IN RELATION TO THEIR BINDING STRENGTH[J]. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,2011,30(8):1827-1833. |
| APA | Kopittke, Peter M.,Blamey, F. Pax C.,McKenna, Brigid A.,Wang, Peng,&Menzies, Neal W..(2011).TOXICITY OF METALS TO ROOTS OF COWPEA IN RELATION TO THEIR BINDING STRENGTH.ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,30(8),1827-1833. |
| MLA | Kopittke, Peter M.,et al."TOXICITY OF METALS TO ROOTS OF COWPEA IN RELATION TO THEIR BINDING STRENGTH".ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 30.8(2011):1827-1833. |
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来源：南京土壤研究所
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