Fruit growth, yield and oil quality changes induced by deficit irrigation at different stages of olive fruit development

Gucci, Riccardo; Caruso, Giovanni; Gennai, Clizia; Esposto, Sonia; Urbani, Stefania; Servili, Maurizio

doi:10.1016/j.agwat.2018.08.022

Cited by 93 publications

(75 citation statements)

References 46 publications

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“…Another study with water stress during pit hardening stage in “Arbequina” cultivar but in a different location (Sanchez‐Rodriguez et al, ) found a quadratic correlation and polyphenols decreased when stress was higher than −4.00 MPa. In the present work, deficit irrigation during the pit hardening period, also increased TPC concentration, and, as expected, the higher the water stress, the higher the antioxidant capacity and the TPC because stress did not overcrom −4.00 MPa; these results agreed with the hypothesis of Gucci et al (): early stages of fruit growth influence not only the cell division but also the phenolic concentration. In brief, hydroSOStainable olive oils (T1–T3) presented higher antioxidant capacity and TPC than conventional oils (T0 oils); therefore, this improvement could be linked, at least in part, to the polyphenolic health claim for olive oil (5 mg of hydroxytyrosol and its derivatives per 20 g of olive oil contribute to the protection of blood lipids from oxidative stress [European Union, ]).…”

Section: Resultssupporting

confidence: 93%

“…In this way, there are previous evidences that tree water status is inversely correlated with polyphenols content in olive oil (Servili et al, ). A recent study has demonstrated that timing of deficit irrigation also influences the polyphenols synthesis (Gucci et al, ), who concluded that, water deficit was carried out before pit hardening, polyphenol synthesis was increased. Another study with water stress during pit hardening stage in “Arbequina” cultivar but in a different location (Sanchez‐Rodriguez et al, ) found a quadratic correlation and polyphenols decreased when stress was higher than −4.00 MPa.…”

Section: Resultsmentioning

confidence: 99%

“…“Koroneiki” (Stefanoudaki et al, ), indicating that the effect of different water regimes on olive oil fatty acid composition could be cultivar dependent. Regarding the “Frantoio” cultivar, the application of RDI before pit hardening had no clear effects on fatty acid composition (Gucci et al, ). A recent study about RDI during pit hardening carried out in Sevilla (Spain) (Sanchez‐Rodriguez et al, ) also found an increased on MUFA due to water stress during this stage, but no statistical differences were found on SFA, PUFA, AI, and TI, so location is a very important factor to consider.…”

Section: Resultsmentioning

confidence: 99%

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“Arbequina” Olive Oil Composition Is Affected by the Application of Regulated Deficit Irrigation during Pit Hardening Stage

Sánchez‐Rodríguez

Kranjac

Marijanović

et al. 2020

J Americ Oil Chem Soc

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Three new regulated deficit irrigation (RDI) treatments were applied to "Arbequina" olive orchards during pit hardening. Oil quality was determined by measuring analytical parameters for olive oil grading, antioxidant activity, total phenol content, fatty acid profile, volatile compounds profile, and sensory analysis. Oils from RDI were classified as "extra virgin olive oil" and their quality was improved due to their higher antioxidant potential (ABTS + [increased~75%] and DPPH˙[increased~25%] assays) and phenols (increased~53%) than control. Concentration of total volatile compounds decreased (~27%) but RDI olive oils showed a more balanced profile (alcohols, aldehydes, and esters). Monounsaturated fatty acid content increased (~5%) and atherogenic and thrombogenic indexes decreased (~8.5%) in RDI olive oil. Regarding sensory analysis, RDI provided more balanced oils with higher fruit aroma than control. Other benefits of RDI olive oil, when compared with oil from full irrigated orchards are reduced use of water and improved functional and sensory quality.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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“Arbequina” Olive Oil Composition Is Affected by the Application of Regulated Deficit Irrigation during Pit Hardening Stage

Sánchez‐Rodríguez

Kranjac

Marijanović

et al. 2020

J Americ Oil Chem Soc

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“…This could be explained by the increase in rainfall, which led to an increase in the phenol content of safflower oil. These results are in accordance with those reported by Palese et al [27] and in contradiction with those reported by Gucci et al [28] regarding olive oil.…”

Section: Discussionsupporting

confidence: 89%

Phenol Content and Antioxidant and Antiaging Activity of Safflower Seed Oil (Carthamus Tinctorius L.)

et al. 2019

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The phenol content of vegetable oil and its antioxidant activity are of primary interest for human health. Oilseed species are considered important sources of these compounds with medicinal effects on a large scale. Total phenol content (TPC) and antioxidant activity (AA) of safflower oil were previously studied. Nevertheless, there is no report on genotypic differences and antiaging activity of safflower oil. The aim of this study was to determine the TPC, diphenyl-picrylhydrazyl (DPPH), and antiaging activity on three respective accessions from Syria, France, and Algeria of seed oil of safflower grown under semi-arid conditions during 3 consecutive years (2015, 2016, and 2017). The results showed that phenol content as well as antioxidant and antiaging activity varied according to both genotype and years. In 2017, the mean value of TPC in oil seed was two times higher than in 2015 and 2016. Moreover, accessions presented different TPC values depending on the year. The highest antioxidant activity was observed among accessions in 2017 compared to 2015 and 2016. As expected, a positive correlation was found between TPC and antioxidant activity. The inhibition in the collagenase assay was between 47% and 72.1% compared to the positive control (83.1%), while inhibition in the elastase assay of TPC ranged from 32.2% to 70.3%, with the positive control being 75.8%. These results highlight the interest of safflower oil as a source of phenols with valuable antioxidant and antiaging activity, and uses for cosmetics.

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“…However, Ismail et al (1997) and Motilva et al (1997) noticed higher free fatty acids, peroxide value, total phenols, and oxidative stability in oils extracted from irrigated trees compared to those extracted from water stressed trees. Contrariwise, total phenols, the most affected olive oil components, are significantly higher in VOO from stressed trees than from irrigated ones (Romero et al, 2002;Berenguer et al, 2006;Servili et al, 2007;Fernandes-Silva et al, 2013;García et al, 2017;Gucci et al, 2019).…”

Section: Introductionmentioning

confidence: 93%

Influence of ripening index and water regime on the yield and quality of “Moroccan Picholine” virgin olive oil

Yamani

Sakar

Boussakouran

et al. 2020

OCL

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The purpose of this work is to evidence the effects of ripening index and water regime on the quantity and quality indices of “Moroccan Picholine” virgin olive oil (VOO) produced in northern Morocco. Olive trees were subjected to full irrigation and rainfed conditions, and olive fruits were collected at different ripening times. Results showed that the extracted volume of VOO increased during ripening, and decreased when full irrigation was applied. In regard to VOO quality, the statistical analysis revealed the predominant effect of ripening index on the majority of the considered parameters, except total phenols content that was strongly influenced by water regime. At more advanced stages of maturity, lower values of peroxide value, K232, carotenoids, chlorophylls and total phenols were registered while more free fatty acids were accumulated. Moreover, full irrigation reduced total phenols and increased free fatty acids, even if a great amount of pigment content was scored. Correlation studies showed significant relationships between pigments content and oxidation indices (peroxide value and K232).

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Fruit growth, yield and oil quality changes induced by deficit irrigation at different stages of olive fruit development

Cited by 93 publications

References 46 publications

“Arbequina” Olive Oil Composition Is Affected by the Application of Regulated Deficit Irrigation during Pit Hardening Stage

“Arbequina” Olive Oil Composition Is Affected by the Application of Regulated Deficit Irrigation during Pit Hardening Stage

Phenol Content and Antioxidant and Antiaging Activity of Safflower Seed Oil (Carthamus Tinctorius L.)

Influence of ripening index and water regime on the yield and quality of “Moroccan Picholine” virgin olive oil

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