alexa Alleviation of Lead Toxicity by Silicon is Related to Elevated Photosynthesis, Antioxidant Enzymes Suppressed Lead Uptake and Oxidative Stress in Cotton
ISSN: 2155-6199

Journal of Bioremediation & Biodegradation
Open Access

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Research Article

Alleviation of Lead Toxicity by Silicon is Related to Elevated Photosynthesis, Antioxidant Enzymes Suppressed Lead Uptake and Oxidative Stress in Cotton

Bharwana SA1, Ali S1*, Farooq MA1, Iqbal N2, Abbas F1 and Ahmad MSA3
1Department of Environmental Sciences, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan
2Department of Botany, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan
3Department of Botany, University of Agriculture, Faisalabad, Pakistan
Corresponding Author : Ali S
Department of Environmental Sciences
Government College University
Allama Iqbal Road, 38000
Faisalabad, Pakistan
Tel: +92 41 9201566
Fax: +92 41 9200671
E-mail: [email protected]
Received April 05, 2013; Accepted May 09, 2013; Published May 11, 2013
Citation: Bharwana SA, Ali S, Farooq MA, Iqbal N, Abbas F, et al. (2013) Alleviation of Lead Toxicity by Silicon is Related to Elevated Photosynthesis, Antioxidant Enzymes Suppressed Lead Uptake and Oxidative Stress in Cotton. J Bioremed Biodeg 4:187. doi: 10.4172/2155-6199.1000187
Copyright: © 2013 Bharwana SA, et al. This is an open-a ccess 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.
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Abstract

Lead (Pb) is known to cause highly toxic direct and indirect effects on plants, animals and humans, like other
metals of its group. The mitigating effects of exogenous Silicon (Si) application on Pb stressed cotton plants
were investigated in this hydroponic study. The following growth parameters were observed chlorophyll contents, photosynthesis, growth, Pb uptake and accumulation, Malondialdehyde (MDA), Hydrogen Peroxide (H2O2) contents, Electrolyte Leakage (EL), soluble protein and the activities of major antioxidant enzymes (superoxide dismutase, SOD; guaiacol peroxidase, GPX; ascorbate peroxidase, APX and catalase, CAT). Six treatments with three replicates including control (basal nutrients comprising neither lead nor silicon), 1 mM silicon (Si), 50 μM Pb, 100 μM Pb, 50 μM Pb with 1 mM Si and 100 μM Pb with 1 mM Silicon (Si) were studied.

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