Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety Farga
The effect of different irrigation and pruning strategies on the amount of substances related to the oxidative stability of virgin olive oils of the variety Farga (polyphenols, chlorophylls, carotenoids and fatty acids), was analyzed. Four treatments were used: T100%SP (irrigation supplying 100% of...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2013-09-01
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| Series: | Grasas y Aceites |
| Subjects: | |
| Online Access: | http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1442 |
| _version_ | 1818939140364828672 |
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| author | J. I. Monteleone C. A. Zuritz A. D. Gascón J. A. Morábito |
| author_facet | J. I. Monteleone C. A. Zuritz A. D. Gascón J. A. Morábito |
| author_sort | J. I. Monteleone |
| collection | DOAJ |
| description | The effect of different irrigation and pruning strategies on the amount of substances related to the oxidative stability of virgin olive oils of the variety Farga (polyphenols, chlorophylls, carotenoids and fatty acids), was analyzed. Four treatments were used: T100%SP (irrigation supplying 100% of the plants’ evaporative transpiration demand (Etc) during the entire cycle, without winter pruning); T50%SP (irrigation supplying 50% of the plants’ Etc from pit hardening to harvest, without winter pruning); T100%CP (irrigation supplying 100%, with pruning) and T50%CP (irrigation supplying 50%, with pruning). The plants’ hydric status was monitored through the stem hydric potential (SHP) at noon, and the soil moisture content and the photosynthetically active incident radiation within the tree branches were determined. The olive sampling was taken from pre-ripening to full maturity. The oil was extracted from the olives by grinding them in a laboratory screw type mill with thermo-kneading. The separation of solid and liquid phases was performed using a hand press and decanter to remove the oil. Chlorophylls and carotenoids (absorbance at 670 nm and 472 nm) and total polyphenols (at 725 nm), were determined by spectrophotometry on the mechanically extracted oil. Fatty acids were determined by capillary gas chromatography (CGC). Oil yield data show no statistical differences between deficit irrigation covering 50% of the ETc and the control treatment, both in plants with or without pruning. The contents of polyphenols, chlorophylls and carotenoids in the oils decrease with fruit ripening, regardless of the initial content and treatment. Deficit irrigation treatments (T 50%) have higher contents of polyphenols (except for pre-envero sampling), chlorophylls and carotenoids. There are no statistically significant differences between treatments with and without pruning. |
| first_indexed | 2024-12-20T06:19:01Z |
| format | Article |
| id | doaj.art-fbe99b186e42427a999a3f068e4999b2 |
| institution | Directory Open Access Journal |
| issn | 0017-3495 1988-4214 |
| language | English |
| last_indexed | 2024-12-20T06:19:01Z |
| publishDate | 2013-09-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Grasas y Aceites |
| spelling | doaj.art-fbe99b186e42427a999a3f068e4999b22022-12-21T19:50:29ZengConsejo Superior de Investigaciones CientíficasGrasas y Aceites0017-34951988-42142013-09-0164436937710.3989/gya.1198121410Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety FargaJ. I. Monteleone0C. A. Zuritz1A. D. Gascón2J. A. Morábito3Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Facultad de Ciencias Agrarias. Universidad Nacional de CuyoFacultad de Ciencias Agrarias. Universidad Nacional de Cuyo.The effect of different irrigation and pruning strategies on the amount of substances related to the oxidative stability of virgin olive oils of the variety Farga (polyphenols, chlorophylls, carotenoids and fatty acids), was analyzed. Four treatments were used: T100%SP (irrigation supplying 100% of the plants’ evaporative transpiration demand (Etc) during the entire cycle, without winter pruning); T50%SP (irrigation supplying 50% of the plants’ Etc from pit hardening to harvest, without winter pruning); T100%CP (irrigation supplying 100%, with pruning) and T50%CP (irrigation supplying 50%, with pruning). The plants’ hydric status was monitored through the stem hydric potential (SHP) at noon, and the soil moisture content and the photosynthetically active incident radiation within the tree branches were determined. The olive sampling was taken from pre-ripening to full maturity. The oil was extracted from the olives by grinding them in a laboratory screw type mill with thermo-kneading. The separation of solid and liquid phases was performed using a hand press and decanter to remove the oil. Chlorophylls and carotenoids (absorbance at 670 nm and 472 nm) and total polyphenols (at 725 nm), were determined by spectrophotometry on the mechanically extracted oil. Fatty acids were determined by capillary gas chromatography (CGC). Oil yield data show no statistical differences between deficit irrigation covering 50% of the ETc and the control treatment, both in plants with or without pruning. The contents of polyphenols, chlorophylls and carotenoids in the oils decrease with fruit ripening, regardless of the initial content and treatment. Deficit irrigation treatments (T 50%) have higher contents of polyphenols (except for pre-envero sampling), chlorophylls and carotenoids. There are no statistically significant differences between treatments with and without pruning.http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1442irrigationolive treespolyphenolspruningvirgin olive oil |
| spellingShingle | J. I. Monteleone C. A. Zuritz A. D. Gascón J. A. Morábito Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety Farga Grasas y Aceites irrigation olive trees polyphenols pruning virgin olive oil |
| title | Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety Farga |
| title_full | Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety Farga |
| title_fullStr | Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety Farga |
| title_full_unstemmed | Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety Farga |
| title_short | Effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety Farga |
| title_sort | effect of irrigation and pruning on the amount of minor compounds and fatty acids in the virgin olive oils of the variety farga |
| topic | irrigation olive trees polyphenols pruning virgin olive oil |
| url | http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1442 |
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