Alleviative Effects of Magnesium on Copper-Induced Oxidative Stress in Grapevines

Chen Bo-Ching¹, Juang Kai-Wei²

Abstract

Intensive and long-term application of copper (Cu)-containing fungicides in vine-growing areas has led to the accumulation of Cu on the surface of some vineyard soils around the world, thus posing the problems of Cu toxicity to the organisms therein. In this study, a hydroponic experiment was conducted to determine the influence of magnesium (Mg) on the oxidative stress and the Cu accumulation in grapevine seedlings exposed to a solution Cu concentration of 15 µM. Results of the present study showed that Cu accumulated mainly in the roots and inhibited the elongation of new roots. For oxidative stress, the Cu exposure not only induced antioxidant enzymes (superoxide dismutase (SOD) activity and catalyse and APX concentration), but also increased production of reactive oxygen species (H₀₂O₀₂ and malondialdehyde (MDA)) in the roots and leaves. On the other hand, the Cu-induced SOD, CAT, H2O2, and MDA content in the roots decreased significantly with increasing solution Mg concentration of 2, 4, and 8 mM. Furthermore, Mg-addition declined the accumulation of Cu in the roots. The present results indicated that Cu exposure causes oxidative stress to grapevine seedlings, yet Mg alleviates Cu-induced oxidative stress by preventing Cu from binding to toxic action sites at the surface of grapevine roots.

Keywords

• Accumulation, Copper, Grapevine, Oxidative Stress

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Cite this Article as Follows

Chen Bo-Ching, Juang Kai-Wei. Alleviative Effects of Magnesium on Copper-Induced Oxidative Stress in Grapevines. International Conference on Technology and Environmental Science (2020): 03. Print.