alexa Selenium Treatment Mitigates the Effect of Lead Exposur
ISSN: 2161-0525

Journal of Environmental & Analytical Toxicology
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Research Article

Selenium Treatment Mitigates the Effect of Lead Exposure in Coleus Blumei Benth

Juhong Yuan1, Mianhao Hu2* and Zaohong Zhou2
1Department of Landscape, Jiangxi University of Finance and Economics, China
2Department of Resource Environment, Jiangxi University of Finance and Economics, China
Corresponding Author : Mianhao Hu
Department of Resource Environment
Jiangxi University of Finance and Economics
Nanchang 330032, PR China
E-mail: [email protected]
Received August 22, 2013; Accepted September 13, 2013; Published September 16, 2013
Citation: Yuan J, Hu M, Zhou Z (2013) Selenium Treatment Mitigates the Effect of Lead Exposure in Coleus Blumei Benth. J Environ Anal Toxicol 3:191. doi: 10.4172/2161-0525.1000191
Copyright: © 2013 Yuan J, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
 

Abstract

We examined the effects of selenium (Se) on coleus (Coleus blumei Benth.) under lead (Pb) stress, to determine possible mitigating mechanisms of Se. Coleus plants were exposed to 1.0 mM Pb(NO3)2 and varying concentrations of Na2SeO3 for 21 d. Application of 1.0 mM Se enhanced biomass allocation and Pb distribution in different organs, decreased superoxide dismutase (SOD) and peroxidase (POD) activity in the roots, and acted as an antioxidant by inhibiting lipid peroxidation via increasing glutathione levels. Root catalase (CAT) and glutathione peroxidase (GSH-Px) activities increased with Se concentration, and changes to root and leaf particles were observed by scanning electron microscopy and X-ray diffraction. Our results indicate Pb is tolerated by coleus plants through allocation plasticity, activation of antioxidant systems, and improvements in particle size and mineralogical effects. C. blumei can be useful in phytoremediation of aquatic systems contaminated with Pb, especially with addition of low concentrations of Se.

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