Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
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
Statement of
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
Plant Leaves
Sulfhydryl Compounds
Soil Pollutants
Water Pollutants
Absorptiometry, Photon
Environmental Monitoring
Water Pollution, Chemical
Biological Transport
Hydrogen-Ion Concentration
Description: Copyright © 2006 American Chemical Society
DOI: 10.1021/es052559a
Published version:
Appears in Collections:Aurora harvest
Chemistry and Physics publications
Environment Institute publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.