Influence of Sulfur Induced Stress on Oxidative Status and Antioxidative Machinery in Leaves of Allium cepa L

A pot culture experiment was carried out to assess the effect of sulfur stress on growth, oxidative status, and antioxidative metabolism. Onion plants were treated with three different levels of sulfur, namely, 1.0, 4.0, and 8.0 mM S L−1. Plants raised with 4.0 mM S L−1 represent sufficient growth f...

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Bibliographic Details
Published in:International scholarly research notices 2014, Vol.2014, p.568081-9
Main Authors: Chandra, Neelam, Pandey, Nalini
Format: Article
Language:English
Subjects:
Antioxidants
Enzymes
Experiments
Health aspects
Machinery
Medical research
Medicinal plants
Medicine, Experimental
Metabolism
Metabolites
Onions
Oxidative stress
Rodents
Seeds
Sulfur
Water shortages
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Summary:A pot culture experiment was carried out to assess the effect of sulfur stress on growth, oxidative status, and antioxidative metabolism. Onion plants were treated with three different levels of sulfur, namely, 1.0, 4.0, and 8.0 mM S L−1. Plants raised with 4.0 mM S L−1 represent sufficient growth for the best vegetative yield. Plants supplied with 1.0 and 8.0 mM S L−1 showed retarded growth, chlorosis, and reduction in biomass and photoassimilatory pigments. Tissue sulfur concentration and cysteine were increased with increasing sulfur supply. Carbohydrates (sugars and starch) were accumulated in sulfur stressed plants. Hydrogen peroxide levels were increased in sulfur stressed plants. Thiobarbituric acid reactive substances levels were also increased which was an indicator of lipid peroxidation. Enzymatic (superoxide dismutase, catalase, peroxidase, ascorbate peroxidase, and glutathione reductase) and nonenzymatic (asorbate) antioxidative components were enhanced in sulfur stressed plants. Glutathione was increased with increasing sulfur supply. The present study showed that the adverse effects of inadequate sulfur supply result in irregular metabolic activities and antioxidant machinery.
ISSN:2356-7872
2356-7872
DOI:10.1155/2014/568081