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Effects of magnetic solutions on some biochemical properties and production of some phenolic compounds in grapevine (Vitis vinifera L.)

Zareei, Elnaz, Zaare-Nahandi, Fariborz, Oustan, Shahin, Hajilou, Jafar
Scientia horticulturae 2019 v.253 pp. 217-226
2,2-diphenyl-1-picrylhydrazyl, Vitis vinifera, anthocyanins, antioxidant activity, biosynthesis, carbohydrate content, cultivars, electrochemistry, grapes, high performance liquid chromatography, leaves, magnetic fields, proline, secondary metabolites, tandem mass spectrometry
Magnetic water and solution are produced by passing liquids through a magnetic field with specific strength and flow rate. During this process, water undergoes various changes of physicochemical and electrochemical properties. Phenolic compounds as secondary metabolites are responsible for the quality of plant, antioxidant properties and their potentially beneficial. In this study, we evaluated the effect of magnetic water and solutions on some biochemical parameters of two grapevines cultivars include ‘Rasha’ and ‘Sultana’. Results showed magnetized solutions significantly increased the carbohydrate content and proline accumulation of the grapevine leaves. Concentration of phenolic compounds such as total phenol, anthocyanin and flavonoid was increased by magnetic solution which indicated a significant effect of magnetic treatments on this parameter. DPPH radical scavenging activity was affected by magnetic solutions, and we found a positive correlation between total antioxidant activity and different phenolic compounds. Also, the PAL activity was increased in the grapevines treated with magnetic solution compared to that of control. Based on HPLC results and subsequent MS/MS measurement, trans-resveratrol production had a significant increase with the magnetic solution. Magnetic treatments seem to cause conditions similar to stress for grapevine, and as a result, it produces more secondary metabolites such as phenolic compounds to withstand this condition. Magnetic water and solutions in grapes by stimulating the biosynthesis of the phenolic compound can fortify the plant with these valuable metabolites.