1. Calcium applications throughout fruit development enhance olive quality, oil yield, and antioxidant compounds' content.
- Author
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Morales-Sillero A, Lodolini EM, Suárez MP, Navarrete V, Jiménez MR, Casanova L, Gregori L, Rallo P, and Martín-Vertedor D
- Subjects
- Antioxidants metabolism, Fruit chemistry, Fruit metabolism, Italy, Olea chemistry, Olea growth & development, Olive Oil metabolism, Phenols chemistry, Phenols metabolism, Spain, Antioxidants chemistry, Calcium metabolism, Fruit growth & development, Olea metabolism, Olive Oil chemistry
- Abstract
Background: Calcium is a preservative and firming agent largely used in the table olive industry. Foliar applications of calcium (as calcium chloride, CaCl
2 ) before harvest have been proposed in other fruits to increase firmness and reduce physiological disorders or internal damage. However, there is still a shortage of information regarding the source, the concentration, the number, and the period of calcium application onto the canopy to get an effective response of olive quality. In this study, we aimed to investigate the effect of two concentrations of CaCl2 foliar treatments (0.5% and 1.0%), applied at different stages of fruit development (at the end of fruit set, end of pit hardening, and prior to harvesting), on olive quality for two varieties ('Manzanilla de Sevilla' and 'Ascolanta tenera'), cultivated in two different geographical areas (Spain and Italy respectively)., Results: The calcium concentrations applied enhanced the fruit calcium content and decreased sodium and potassium. They also improved the mechanical properties without modifying fruit morphology or cuticle thickness; nor did they cause phytotoxicity. Foliar treatments increased the oil content in the pulp (dry weight basis) and the amount of hydroxytyrosol, tyrosol, and oleuropein, among other phenols., Conclusion: Calcium foliar applications during fruit development effectively increase olive quality. © 2020 Society of Chemical Industry., (© 2020 Society of Chemical Industry.)- Published
- 2021
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