CALCIUM AND MAGNESIUM ENHANCE ARSENATE RHIZOTOXICITY AND UPTAKE IN TRITICUM AESTIVUM
文献类型：期刊论文
| 作者 | Wang, Peng1,2; Zhou, Dongmei1; Weng, Nanyan1,2; Wang, Dengjun1,2; Peijnenburg, Willie J. G. M.3,4 |
| 刊名 | ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
 |
| 出版日期 | 2011-07-01 |
| 卷号 | 30期号:7页码:1642-1648 |
| 关键词 | Arsenate Calcium Magnesium Surface electrical potential Root growth |
| ISSN号 | 0730-7268 |
| DOI | 10.1002/etc.547 |
| 通讯作者 | Zhou, Dongmei(dmzhou@issas.ac.cn) |
| 英文摘要 | Cations such as calcium (Ca) and magnesium (Mg) alleviate toxicities of cationic toxicants and increase those of anionic toxicants such as arsenic (As) present as arsenate under aerobic conditions. Increasing evidence exists that these phenomena are related to the outer surface electrical potential (psi(0)degrees) of the root cell plasma membrane (PM). Short-term (48-h) nutrient culture experiments with wheat (Triticum aesiivum L.) seedlings investigated Ca and Mg effects on arsenate rhizotoxicity and uptake. Increased Ca and Mg in solution from 0.2 to 3.5 mM equally reduced the negativity of psi(0)degrees from -45 to -15 mV. This increased arsenate activity at the PM surface from 0.3 to 0.9 mu M at the same bulk concentration of 2.0 mu M NaH(2)AsO(4) consequently increased arsenate uptake and rhizotoxicity. However, increased Mg was more effective than Ca in enhancing As uptake by roots, especially with the activity of As in the range of 0.5 to 1.5 mu M in the bulk medium. This was explained by a modified electrostatic uptake model which indicated a mechanism other than through an effect on psi(0)degrees. Subcellular fractionation of roots indicated that > 95% of As was associated with cellular debris and heat-stable protein (HSP). The results of the present study show that Ca and Mg reduce the negativity of psi(0)degrees, increasing arsenate uptake and rhizotoxicity, and suggest that Mg is more efficient than Ca in enhancing the uptake of As due, in large part, to inducing greater As binding by peptides in the HSP fraction. Environ. Toxicol. Chem. 2011;30:1642-1648. (C) 2011 SETAC |
| 收录类别 | SCI |
| WOS关键词 | BARLEY HORDEUM-VULGARE ; SOLUTION CULTURE ; TOXICITY ; COPPER ; MODEL ; BIOAVAILABILITY ; CADMIUM ; WHEAT ; PHYTOTOXICITY ; ALLEVIATION |
| WOS研究方向 | Environmental Sciences & Ecology ; Toxicology |
| WOS类目 | Environmental Sciences ; Toxicology |
| 语种 | 英语 |
| WOS记录号 | WOS:000292004400020 |
| 出版者 | WILEY-BLACKWELL |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559060 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhou, Dongmei |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China 3.Natl Inst Publ Hlth & Environm, Lab Ecol Risk Assessment, NL-3720 BA Bilthoven, Netherlands 4.Leiden Univ, Leiden, Netherlands |
| 推荐引用方式 GB/T 7714 | Wang, Peng,Zhou, Dongmei,Weng, Nanyan,et al. CALCIUM AND MAGNESIUM ENHANCE ARSENATE RHIZOTOXICITY AND UPTAKE IN TRITICUM AESTIVUM[J]. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,2011,30(7):1642-1648. |
| APA | Wang, Peng,Zhou, Dongmei,Weng, Nanyan,Wang, Dengjun,&Peijnenburg, Willie J. G. M..(2011).CALCIUM AND MAGNESIUM ENHANCE ARSENATE RHIZOTOXICITY AND UPTAKE IN TRITICUM AESTIVUM.ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,30(7),1642-1648. |
| MLA | Wang, Peng,et al."CALCIUM AND MAGNESIUM ENHANCE ARSENATE RHIZOTOXICITY AND UPTAKE IN TRITICUM AESTIVUM".ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 30.7(2011):1642-1648. |
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来源：南京土壤研究所
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