期刊
ENVIRONMENTAL POLLUTION
卷 157, 期 10, 页码 2781-2789出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2009.04.024
关键词
ABC transporter; Cadmium; AtMRP7; Phytoremediation; Plants, tobacco
资金
- EU [QLRT-2000-00479, FOOD-CT-2006-016253]
- State Committee for Scientific Research
- Warsaw University [179162]
Arabidopsis MRPs/ABCCs have been shown to remove various organic and inorganic substrates from the cytosol to other subcellular compartments. Here we first demonstrate that heterologous expression of AtMRP7 in tobacco (Nicotiana tabacum var. Xanthi) modifies cadmium accumulation, distribution and tolerance. Arabidopsis MRP7 was localized both in the tonoplast and in the plasma membrane when expressed in tobacco. Its overexpression increased tobacco Cd-tolerance and resulted in enhanced cadmium concentration in leaf vacuoles, indicating more efficient detoxification by means of vacuolar storage. Heterologous AtMRP7 expression also led to more efficient retention of Cd in roots, suggesting a contribution to the control of cadmium root-to-shoot translocation. The results underscore the use of AtMRP7 in plant genetic engineering to modify the heavy-metal accumulation pattern for a broad range of applications. (C) 2009 Elsevier Ltd. All rights reserved.
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