Toxic effects of Cu2+ on growth, nutrition, root morphology, and distribution of Cu in roots of Sabi grass

Kopittke, P. M., Asher, C. J., Blamey, F. P. C. and Menzies, N. W. (2009) Toxic effects of Cu2+ on growth, nutrition, root morphology, and distribution of Cu in roots of Sabi grass. Science of the Total Environment, 407 16: 4616-4621. doi:10.1016/j.scitotenv.2009.04.041


Author Kopittke, P. M.
Asher, C. J.
Blamey, F. P. C.
Menzies, N. W.
Title Toxic effects of Cu2+ on growth, nutrition, root morphology, and distribution of Cu in roots of Sabi grass
Formatted title
Toxic effects of Cu2+ on growth, nutrition, root morphology, and distribution of Cu in roots of Sabi grass
Journal name Science of the Total Environment   Check publisher's open access policy
ISSN 0048-9697
Publication date 2009-08-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.scitotenv.2009.04.041
Open Access Status
Volume 407
Issue 16
Start page 4616
End page 4621
Total pages 6
Editor J. Nriagu
Place of publication Netherlands
Publisher Elsevier BV
Language eng
Subject C1
961205 Rehabilitation of Degraded Mining Environments
050304 Soil Chemistry (excl. Carbon Sequestration Science)
Formatted abstract
Sabi grass (Urochloa mosambicensis (Hack.) Dandy) (a C4 species of Poaceae) is commonly used to revegetate disturbed sites in low-rainfall environments, but comparatively little is known regarding copper (Cu) toxicity in this species. A dilute nutrient solution culture experiment was conducted for 10 d to examine the effects of elevated Cu2+ activities ({Cu2+}) on the growth of Sabi grass. Growth was inhibited by high Cu in solution, with a 50% reduction in the relative fresh mass occurring at 1.0 μM {Cu2+} for the roots and 1.2 μM {Cu2+} for the shoots. In solutions containing 1.2–1.9 μM {Cu2+}, many of the roots ruptured due to the tearing and separation of the rhizodermis and outer cortex from the underlying tissues. Transmission electron microscopy revealed that Cu-rich deposits were found to accumulate predominantly within vacuoles. Due to limited translocation of Cu from the roots to the shoots, phytotoxicity is likely to be more of a problem in remediation of Cu-toxic sites than is Cu toxicity of fauna consuming the above-ground biomass.
Keyword Critical external and internal Cu
Cowpea Vigna-Unguiculata
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Agriculture and Food Sciences
 
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Created: Thu, 03 Sep 2009, 17:49:30 EST by Mr Andrew Martlew on behalf of Faculty Of Nat Resources, Agric & Veterinary Sc