Tolerance of two perennial grasses to toxic levels of Ni2+

Kopittke, Peter M., Asher, Colin J., Blamey, F. Pax. C. and Menzies, Neal W. (2008) Tolerance of two perennial grasses to toxic levels of Ni2+. Environmental Chemistry, 5 6: 426-434. doi:10.1071/EN08054


Author Kopittke, Peter M.
Asher, Colin J.
Blamey, F. Pax. C.
Menzies, Neal W.
Title Tolerance of two perennial grasses to toxic levels of Ni2+
Formatted title
Tolerance of two perennial grasses to toxic levels of Ni2+
Journal name Environmental Chemistry   Check publisher's open access policy
ISSN 1448-2517
Publication date 2008-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1071/EN08054
Open Access Status Not yet assessed
Volume 5
Issue 6
Start page 426
End page 434
Total pages 9
Editor Green, Alison
Place of publication Australia
Publisher CSIRO Publishing
Language eng
Subject C1
961205 Rehabilitation of Degraded Mining Environments
050207 Environmental Rehabilitation (excl. Bioremediation)
070101 Agricultural Land Management
Abstract Toxic effects of Nickel (Ni) in solutionwere evaluated in signal grass and Rhodes grass, two species commonly used for the revegetation of contaminated sites in the tropics and sub-tropics. Both grasses had a similar response to Ni, a Ni2+ activity ({Ni2+}) of 14 x 10(-6) M, which reduced the fresh mass by 50%. The sub-cellular distribution of Ni in the roots was similar for both species, with Ni accumulating primarily as particles < 5 nm in the vacuoles of rhizodermal and outer cortical cells. The reduction in growth at elevated {Ni2+} caused a loss of apical dominance in the roots and a Ni-induced Fe deficiency in the shoots. Root hair growth was not reduced by Ni2+ toxicity and was prolific even at the highest {Ni2+} (35 x 10(-6) M). The translocation of Ni to the plant tops of both grasses resulted in concentrations that exceeded the guidelines for Ni toxicity to grazing animals (100 mu g g(-1)) when grown with >= 11 x 10(-6) M{Ni2+} in solution.
Keyword Chemistry, Analytical
Environmental Sciences
Chemistry
Environmental Sciences & Ecology
CHEMISTRY, ANALYTICAL
ENVIRONMENTAL SCIENCES
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 3-3-01-05/6
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Agriculture and Food Sciences
 
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Created: Thu, 16 Apr 2009, 21:30:13 EST by Emma Cushworth on behalf of School of Land, Crop and Food Sciences