Modification of pomological characteristics and flavour components of fruits and virgin olive oil following wastewater irrigation and soil tillage

Tekaya, Meriem; Chehab, Hechmi; Flamini, Guido; Gharbi, Ines; Mahjoub, Zoubeir; Laamari, Salwa; Chihaoui, Badreddine; Boujnah, Dalenda; Hammami, Mohamed; Mechri, Beligh

doi:10.1002/jsfa.8791

Cited by 4 publications

(6 citation statements)

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“…Despite the contribution of the higher net photosynthetic rate of FI, RDI, and SDI plants to higher productivity, the increase in crop yield, relative to SDIAF, was correlated with the seasonal water volume, in line with previous studies . Meanwhile, the higher crop yield of FI trees in relation to DIS treatments was associated with the higher weight of the fruits.…”

Section: Discussionsupporting

confidence: 87%

“…On the other hand, the decrease in water supply increased the stressful conditions experienced by the plants, as observed by the physiological performance of the trees and, consequently, the necessity for them to invest in the secondary metabolism to protect against oxidative stress . In fact, several studies reported that stressful conditions increase the accumulation of phenolic compounds in olive fruit . Although the increased accumulation of phenolic compounds improves their antioxidant properties, oils are occasionally characterized as excessively bitter .…”

Section: Discussionmentioning

confidence: 99%

“…4,9,57 Yield and fruit physicochemical characteristics Despite the contribution of the higher net photosynthetic rate of FI, RDI, and SDI plants to higher productivity, the increase in crop yield, relative to SDIAF, was correlated with the seasonal water volume, in line with previous studies. 22,30,58 Meanwhile, the higher crop yield of FI trees in relation to DIS treatments was associated with the higher weight of the fruits. However, the higher fruit weight was more evident when expressed by fresh weight than by dry weight, meaning that the water content of fruit is decisive for crop yield measurements.…”

Section: Foliar Biochemical Componentsmentioning

confidence: 92%

“…52 In fact, several studies reported that stressful conditions increase the accumulation of phenolic compounds in olive fruit. 9, 22,49,64,65 Although the increased accumulation of phenolic compounds improves their antioxidant properties, oils are occasionally characterized as excessively bitter. 66 The increase in quality conferred by the phenolic compounds is usually offset by the losses in yield, as observed in the SDIAF treatment.…”

Section: Foliar Biochemical Componentsmentioning

confidence: 99%

“…Conversely, if applied during summer, specifically during the fruit pit‐hardening phase, deficit irrigation could result in lower reduction in fruit and oil yield . Moreover, a deficit irrigation system usually contributes to change the pomological characteristics, as well the chemical composition of fruits, with consequences at commercial, nutritional, and sensorial levels . Consequently, the cultivar, environmental conditions, and management practices, among other factors, must be taken into account when studying the effect of DIS on plant phenology, growth, carbon assimilation, water‐use efficiency, and also their impact on olive fruit yield and quality …”

Section: Introductionmentioning

confidence: 99%

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Olive tree physiology and chemical composition of fruits are modulated by different deficit irrigation strategies

et al. 2019

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BACKGROUND Cropping practices focusing on agronomic water use efficiency and their impact on quality parameters must be investigated to overcome constraints affecting olive groves. We evaluated the response of olive trees (Olea europaea, cv. ‘Cobrançosa’) to different water regimes: full irrigation (FI, 100% crop evapotranspiration (ETc)), and three deficit irrigation strategies (DIS) (regulated (RDI, irrigated with 80% of crop evapotranspiration (ETc) in phases I and III of fruit growth and 10% of ETc in the pit hardening stage), and two continuous sustained strategies (SDI) – a conventional SDI (27.5% of ETc), and low‐frequency irrigation adopted by the farmer (SDIAF, 21.2% of ETc). RESULTS The effects of water regimes on the plant water status, photosynthetic performance, metabolite fluctuations and fruit quality parameters were evaluated. All DIS treatments enhanced leaf tissue density; RDI and SDI generally did not affect leaf water status and maintained photosynthetic machinery working properly, and the SDIAF treatment impaired olive tree physiological indicators. The DIS treatments maintained the levels of primary metabolites in leaves, but SDIAF plants showed signs of oxidative stress. Moreover, DIS treatments led to changes in the secondary metabolism, both in leaves and in fruits, with increased total phenolic compounds, ortho‐diphenols, and flavonoid concentration, and higher total antioxidant capacity, as well higher oil content. Phenolic profiles showed the relevance of an early harvest in order to obtain higher oleuropein levels with associated higher health benefits. CONCLUSION Adequate DIS are essential for sustainable olive growing, as they enhance the competitiveness of the sector in terms of olive production and associated quality parameters. © 2019 Society of Chemical Industry

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Foliar Biochemical Componentsmentioning

confidence: 92%

Section: Foliar Biochemical Componentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Olive tree physiology and chemical composition of fruits are modulated by different deficit irrigation strategies

et al. 2019

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Soil Management

Camposeo,

Gómez

2023

The Olive

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Edible Plant Oil: Global Status, Health Issues, and Perspectives

et al. 2020

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Edible plant oil (EPO) is an indispensable nutritional resource for human health. Various cultivars of oil-bearing plants are grown worldwide, and the chemical compositions of different plant oils are diverse. The extremely complex components in oils lead to diverse standards for evaluating the quality and safety of different EPOs. The environment poses great challenges to the EPO safety and quality during the entire industrial chain, including plant cultivation, harvesting, oil processing, and storage. Environmental risk factors include heavy metal or pesticide residue pollution, insect or harmful microbial infestation, and rancidity. Here, the diverse components in oil and various oil-producing processes are discussed, including plant species, oil yield, and composition complexity, environmental factors that degrade oil quality. Additionally, we propose a whole-industrialchain monitoring system instead of current single-link-monitoring approach by monitoring and tracking the quality and safety of EPOs during the entire process of plant cultivation, raw materials harvest, oil process, and EPOs storage. This will provide guidance for monitoring the quality and safety of EPOs, which were challenged by the deteriorating environment.

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Modification of pomological characteristics and flavour components of fruits and virgin olive oil following wastewater irrigation and soil tillage

Abstract: Agronomic practices may affect considerably the commercial and nutritional values and the sensorial quality of the commodities. © 2017 Society of Chemical Industry.

Cited by 4 publications

References 50 publications

Olive tree physiology and chemical composition of fruits are modulated by different deficit irrigation strategies

Olive tree physiology and chemical composition of fruits are modulated by different deficit irrigation strategies

Soil Management

Edible Plant Oil: Global Status, Health Issues, and Perspectives

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