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Influence of microelement selenium on the antioxidant system of lycium barbarum

Zan Yu-xi

Abstract

Objective To study the effects of microelement selenium on the antioxidant system of Lycium barbarum.Methods Thirty tender seedlings were randomly divided into control group,sodium selenite(Na2SeO3) 0.5 g·kg-1 group and 2.0 g·kg-1 group(n=10).The effects of different concentration of Na2SeO3 on the activities of glutathione peroxidase(GSH-Px),superoxide dismutase(SOD),catalase(CAT),peroxidase(POD) and the contents of glutathione(GSH),ascorbate(ASC),malondialdehyde(MDA) of Lycium barbarum were studied.Results The activities of GSH-Px,SOD and the contents of ASC,GSH in Na2SeO3 0.5 g·kg-1 group were higher than these in control group(P0.05),but the contents of MDA and the activities of CAT,POD were indistinctive between two group.The activities of GSH-Px,SOD,CTA,POD and the contents of ASC,GSH in Na2SeO3 2.0 g·kg-1 group were higher than these in control group(P0.05,P0.01),and the contents of MDA was lower(P0.05).Conclusion Na2SeO3 can increase the activities of antioxidant enzymes and the contents of antioxidant,and decrease the content of MDA,so it can enhance the antioxidant function of Lycium barbarum.

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Key concepts: Glutathione peroxidase, Superoxide dismutase, Malondialdehyde, Antioxidant, Lycium, Chemistry, Catalase, Selenium