Characterisation of lead precipitate following uptake by roots of Brassica juncea

Meyers, Donald E. R., Kopittke, Peter M., Auchterlonie, Graeme J. and Webb, Richard I. (2009) Characterisation of lead precipitate following uptake by roots of Brassica juncea. Environmental Toxicology and Chemistry, 28 11: 2250-2254. doi:10.1897/09-131.1


Author Meyers, Donald E. R.
Kopittke, Peter M.
Auchterlonie, Graeme J.
Webb, Richard I.
Title Characterisation of lead precipitate following uptake by roots of Brassica juncea
Formatted title
Characterisation of lead precipitate following uptake by roots of Brassica juncea
Journal name Environmental Toxicology and Chemistry   Check publisher's open access policy
ISSN 0730-7268
1552-8618
Publication date 2009-11
Sub-type Article (original research)
DOI 10.1897/09-131.1
Volume 28
Issue 11
Start page 2250
End page 2254
Total pages 5
Place of publication Hoboken, NJ, United States
Publisher John Wiley and Sons
Collection year 2010
Language eng
Subject C1
961208 Rehabilitation of Degraded Urban and Industrial Environments
060705 Plant Physiology
Formatted abstract
Seedlings of Brassica juncea (L.) Czern. were grown in solution culture for 14 d prior to exposure to Pb2+ at an activity of 31 mM for 72 h. Electron-dense deposits found within the apoplast and symplast were analyzed using scanning transmission electron microscopy/energy dispersive spectroscopy to determine the chemical identity of the deposits and potential toxicity resistance mechanisms. Irrespective of the cellular compartment in which they were found, the deposits contained Pb, O, P, and Cl. For the extracellular deposits, the average Pb:P:O atomic ratio was 1:0.54:3.0, which together with the hexagonal crystal system suggests that Pb is present as chloropyromorphite (Pb5(PO4)3Cl). A weak Ca signal also was detected in approximately half of the spectra, possibly indicating the presence of small concentrations of phosphohedyphane (Pb3Ca2 (PO4)3Cl). The evidence suggests that B. juncea resists Pb toxicity by storing precipitated Pb in the vacuole. 
Keyword Brassica juncea
Chloropyromorphite
Energy dispersive spectroscopy
Lead precipitate
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Agriculture and Food Sciences
ERA 2012 Admin Only
 
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Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 23 Nov 2009, 15:28:26 EST