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https://hdl.handle.net/2440/47091
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Type: | Journal article |
Title: | Localizing the biochemical transformations of arsenate in a hyperaccumulating fern |
Author: | Pickering, I. Gumaelius, L. Harris, H. Prince, R. Hirsch, G. Banks, J. Salt, D. George, G. |
Citation: | Environmental Science and Technology (Washington), 2006; 40(16):5010-5014 |
Publisher: | Amer Chemical Soc |
Issue Date: | 2006 |
ISSN: | 0013-936X 1520-5851 |
Statement of Responsibility: | Ingrid J. Pickering, Luke Gumaelius, Hugh H. Harris, Roger C. Prince, Gregory Hirsch, Jo Ann Banks, David E. Salt, and Graham N. George |
Abstract: | The fern Pteris vittata accumulates unusually high levels of arsenic. Using X-ray absorption spectroscopy (XAS) and XAS imaging, we reveal the distribution of arsenic species in vivo. Arsenate is transported through the vascular tissue from the roots to the fronds (leaves), where it is reduced to arsenite and stored at high concentrations. Arsenic-thiolate species surrounding veins may be intermediates in this reduction. In gametophytes, arsenite is compartmentalized within the cell vacuole. Arsenic is excluded from cell walls, rhizoids, and reproductive areas. This study provides important insights into arsenic hyperaccumulation, which may prove useful for phytoremediating arsenic-contaminated sites, and demonstrates the strengths of XAS imaging for distinguishing highly localized species. |
Keywords: | Cell Wall Ferns Plant Leaves Arsenates Arsenites Arsenic Sulfhydryl Compounds Soil Pollutants Water Pollutants Absorptiometry, Photon Environmental Monitoring Water Pollution, Chemical Biological Transport Kinetics Hydrogen-Ion Concentration |
Description: | Copyright © 2006 American Chemical Society |
DOI: | 10.1021/es052559a |
Published version: | http://pubs.acs.org/cgi-bin/abstract.cgi/esthag/2006/40/i16/abs/es052559a.html |
Appears in Collections: | Aurora harvest Chemistry and Physics publications Environment Institute publications |
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