Influence of Water Deficit in Bioactive Compounds of Olive Paste and Oil Content |
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| Authors: | Estela Sena‐Moreno Manuel Cabrera‐Bañegil Juan M. Pérez‐Rodríguez Concepción De Miguel María H. Prieto Daniel Martín‐Vertedor |
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| Affiliation: | 1. Technical School of Agricultural Engineering and Forestry (ETSIAM), University of Castilla‐La Mancha, Campus Universitario, S/N, Albacete, Spain;2. Technological Institute of Food and Agriculture (CICYTEX‐INTAEX), Government of Extremadura, Avda. Adolfo Suárez, S/N, Badajoz, Spain;3. CICYTEX‐La Orden, Government of Extremadura, Autovía A‐5, P.K. 372, Guadajira, Badajoz, Spain;4. Vegetal Biology, Ecology and Soil Sciences Department, University of Extremadura, Avda. Adolfo Suárez, S/N, Badajoz, Spain |
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| Abstract: | The main objective of this study was to evaluate the effect of different deficit irrigation treatments (control, regulated deficit irrigation [RDI]‐1, RDI‐2, and RDI‐3) on the phenolic profile of the olive paste and oil content. Irrigation treatments with more stress water led to a considerable increase in the phenolic compounds of olive paste, especially in oleuropein (60.24%), hydroxytyrosol (82%), tyrosol (195%), and verbascoside (223%) compared to control. A significant increase in the content of total flavonoids and phenolic acids was also observed for these samples. In virgin olive oils (VOO) elaborated from the most stressed olive trees (RDI‐2 and RDI‐3), a noticeable increase in phenolic substances with antioxidant properties (oleuropein, hydroxytyrosol, tyrosol, secoiridoid derivatives, and o‐vanillin) was observed. Consequently, water stress conditions improved antioxidant activity of VOO. |
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| Keywords: | Deficit irrigation treatments Olive paste Olive oil Phenolic compounds Antioxidant activity |
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