Effect of ionising radiation on polyphenolic content and antioxidant potential of parathion-treated sage (Salvia officinalis) leaves |
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Authors: | Issam Ben Salem Sana Fekih Haitham Sghaier Mehrez Bousselmi Mouldi Saidi Ahmed Landoulsi Sami Fattouch |
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Affiliation: | 1. Laboratory of Protein Engineering and Bioactive Molecules (LIP-MB), National Institute of Applied Sciences and Technology (INSAT), University of Carthage, Tunis, Tunisia;2. Research Unit, Application of Nuclear Techniques in the Fields of Health, Agriculture, and Environment, National Centre for Nuclear Science and Technology (CNSTN), Sidi Thabet Technopark, 2020 Ariana, Tunisia;3. Biochemistry and Molecular Biology Laboratory, Faculty of Science of Bizerte, University of Carthage, Tunis, Tunisia |
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Abstract: | The γ-irradiation effects on polyphenolic content and antioxidant capacity of parathion-pretreated leaves of Salvia officinalis plant were investigated. The analysis of phenolic extracts of sage without parathion showed that irradiation decreased polyphenolic content significantly (p < 0.05) by 30% and 45% at 2 and 4 kGy, respectively, compared to non-irradiated samples. The same trend was observed for the Trolox equivalent antioxidant capacity (TEAC), as assessed by the anionic DPPH and cationic ABTS radical-scavenging assays. The antioxidant potential decreased significantly (p < 0.01) at 2 and 4 kGy, by 11–20% and 40–44%, respectively. The results obtained with a pure chlorogenic acid solution confirmed the degradation of phenols; however, its TEAC was significantly (p < 0.01) increased following irradiation. Degradation products of parathion formed by irradiation seem to protect against a decline of antioxidant capacity and reduce polyphenolic loss. Ionising radiation was found to be useful in breaking down pesticide residues without inducing significant losses in polyphenols. |
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Keywords: | Antioxidant activity Ionising radiation Medicinal plant Parathion Polyphenols Salvia officinalis |
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