Metal-induced cell rupture in elongating roots is associated with metal ion binding strengths

Kopittke, P. M., McKenna, B. A., Blamey, F. P. C., Wehr, J. B. and Menzies, N. W. (2009) Metal-induced cell rupture in elongating roots is associated with metal ion binding strengths. Plant and Soil, 322 1: 303-315. doi:10.1007/s11104-009-9917-0


Author Kopittke, P. M.
McKenna, B. A.
Blamey, F. P. C.
Wehr, J. B.
Menzies, N. W.
Title Metal-induced cell rupture in elongating roots is associated with metal ion binding strengths
Journal name Plant and Soil   Check publisher's open access policy
ISSN 0032-079X
1573-5036
Publication date 2009-09
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s11104-009-9917-0
Volume 322
Issue 1
Start page 303
End page 315
Total pages 13
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2010
Language eng
Subject C1
961202 Rehabilitation of Degraded Farmland, Arable Cropland and Permanent Cropland Environments
060705 Plant Physiology
Formatted abstract
Low concentrations of Al, Cu and La rapidly decrease root elongation and cause transverse ruptures to the rhizodermis and outer cortex, but it is not known if other trace metals have similar effects. Six trace metals, Ga, Gd, Hg, In, Ru, and Sc, decreased cowpea root growth and caused ruptures similar to those caused by Al, Cu and La. Calculated speciation of the metals showed that only Gd was almost exclusively present as the trivalent ion (Gd3+), but the other test solutions were dominated by Ga (OH)2+, HgCl20, either In3+, In(OH)2+, In(OH)2+, In (OH)30, or InCl2+, and Sc3+ or ScOH2+ (no thermodynamic constants were available for Ru). The results from this and other studies suggest that the ability of these trace metals (plus Al, Cu, and La) to cause ruptures is related to the strength to which the trace metals bind to the cell wall. Therefore, it is proposed that the toxic effects of trace metals results from (1) the strength of binding (either ionically or covalently), and (2) other toxic effects of the metals not dependent on cell wall interactions.  
Keyword Cowpea
Morphology
Root growth
Symptoms
Toxicity
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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Created: Fri, 04 Sep 2009, 10:20:50 EST