Low doses of exogenous methyl jasmonate applied simultaneously with toxic aluminum improve the antioxidant performance of Vaccinium corymbosum

• Published in: Plant and soil Vol. 412; no. 1/2; pp. 81 - 96
• Main Authors: Ulloa-Inostroza, Elizabeth M., Alberdi, M., Meriño-Gergichevich, C., Reyes-Díaz, M.
• Format: Journal Article
• Language: English
• Published: Cham Springer 01.03.2017; Springer International Publishing; Springer Nature B.V
• Subjects: Aluminum; Aluminum (Metal); Antioxidants; Biomedical and Life Sciences; Blueberries; Cultivars; Ecology; Flavonoids; Flowers & plants; Health aspects; Hydrogen peroxide; Jasmonates; Life Sciences; Nutrient concentrations; Oxidative stress; Peroxidation; Phenols; Plant Physiology; Plant Sciences; Regular Article; Soil Science & Conservation; Studies; Vaccinium corymbosum; Al-resistant; Al-sensitive; Jasmonates; Blueberry
• ISSN: 0032-079X; 1573-5036
• DOI: 10.1007/s11104-016-2985-z

Aims: The effect of different MeJA doses applied prior to or simultaneously with toxic A1 on biochemical and physiological properties of Vaccinium corymbosum cultivars with contrasting A1 resistance was studied. Methods: Legacy (A1-resistant) and Bluegold (A1-sensitive) plants were treated with and without toxic A1 under controlled conditions: a) without A1 and MeJA, b) 100 μM, A1, 100 μM A1 + 5 μM MeJA, d) 100 μM A1 + 10 μM MeJA and e) 100 μM A1 + 50 μM MeJA. MeJA was applied to leaves 24 h prior to or simultaneously with A1 in nutrient solution. After 48 h, Alconcentration, lipid peroxidation (LP), H₂O₂, antioxidant activity, total phenols, total flavonoids, phenolic compounds and Superoxide dismutase activity (SOD) of plant organs were analyzed. Results: A1-concentrations increased with A1-treatment in both cultivars, being A1, LP and H₂O₂ concentrations reduced with low simultaneous MeJA application. Higher MeJA doses induced more oxidative damage than the lowest. Legacy increased mainly nonenzymatic compounds, whereas Bluegold increased SOD activity to counteract A1³⁺. Conclusions: Low MeJA doses applied simultaneously with A1³⁺ increased A1-resistance in Legacy by increasing phenolic compounds, while Bluegold reduced oxidative damage through increment of SOD activity, suggesting a diminution of its A1-sensitivity. Higher MeJA doses could be potentially toxic. Studies are needed to determine the molecular mechanisms involved in the protective MeJA effect against A1-toxicity.