Please use this identifier to cite or link to this item: http://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 & Technology, 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
RMID: 0020081435
DOI: 10.1021/es052559a
Published version: http://pubs.acs.org/cgi-bin/abstract.cgi/esthag/2006/40/i16/abs/es052559a.html
Appears in Collections:Chemistry and Physics publications
Environment Institute publications

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