Abstract
The aim of this study was to evaluate the effect of different irrigation strategies on cv. Cobrançosa olive oil main components, in a semiarid region in the Northeast of Portugal (Alfândega da Fé, 2019)—regulated (RDI) and sustained deficit irrigation (SDI) against well-irrigated controls (FW). Total polyphenols (Folin) were higher in RDI than SDI and FW treatments. Among the phenolic components, hydroxytyrosol and tyrosol derivatives (HPLC, after acid hydrolysis), were higher in olive oils obtained under SDI, potentially complying with the nutrition allegation allowed in Regulation (EU) No 432/2012, (“polyphenols in olive oil contribute to the protection of blood lipids against undesirable oxidation”), while the amounts in FI120 and RDI100 olive oils were 10% lower to the threshold. Olive oil vitamin E (mainly α-tocopherol) was also higher in oils obtained from SDI deficit irrigation treatments while oils from RDI had values very close to FI treatments. Olive oil bitterness, evaluated by K225, was highly positively correlated with TP (r2 = 0.94, p < 0.01). The fatty acidy profile was not affected by the irrigation regime. The results are preliminary and need to be continued to extract solid conclusions.
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Claims 7
Claim · model-written summary
RDI olive oil had higher total polyphenols than SDI and FW.
- Taxon
- Olive
Olea europaeat0 - Material
- Cv. Cobrançosat0
- Treatment
- RDIe0
- Outcome
- Total polyphenolse0
- Direction
- highere0
- Comparator
- SDI and FWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total polyphenols (Folin) were higher in RDI than SDI and FW treatments.”
t0“Olive Oil Composition of Cv. Cobrançosa”
Claim · model-written summary
SDI olive oils had higher hydroxytyrosol and tyrosol derivatives.
- Taxon
- OliveOlea europaeat0
- Material
- Cv. Cobrançosat0
- Treatment
- SDIe0
- Outcome
- hydroxytyrosol and tyrosol derivativese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hydroxytyrosol and tyrosol derivatives (HPLC, after acid hydrolysis), were higher in olive oils obtained under SDI”
t0“Olive Oil Composition of Cv. Cobrançosa”
Claim · model-written summary
FI120 and RDI100 olive oils were 10% below the threshold.
- Taxon
- OliveOlea europaeat0
- Material
- Cv. Cobrançosat0
- Treatment
- FI120 and RDI100e0
- Outcome
- amountse0
- Direction
- lowere0
- Value
- 10%e0
- Comparator
- the thresholde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the amounts in FI120 and RDI100 olive oils were 10% lower to the threshold.”
t0“Olive Oil Composition of Cv. Cobrançosa”
Claim · model-written summary
SDI oils had higher vitamin E.
- Taxon
- OliveOlea europaeat0
- Treatment
- SDI deficit irrigation treatmentse0
- Outcome
- Olive oil vitamin Ee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Olive oil vitamin E (mainly α-tocopherol) was also higher in oils obtained from SDI deficit irrigation treatments”
t0“Olive Oil”
Claim · model-written summary
RDI oil vitamin E values were close to FI values.
- Taxon
- OliveOlea europaeat0
- Treatment
- RDIe0
- Outcome
- valuese0
- Direction
- very closee0
- Comparator
- FI treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“oils from RDI had values very close to FI treatments.”
t0“Olive Oil”
Claim · model-written summary
Olive oil bitterness was positively correlated with total polyphenols.
- Taxon
- OliveOlea europaeat0
- Compound
- TPe0
- Outcome
- Olive oil bitternesse0
- Direction
- highly positively correlatede0
- Value
- r2 = 0.94e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Olive oil bitterness, evaluated by K225, was highly positively correlated with TP (r2 = 0.94, p < 0.01).”
t0“Olive Oil”
Claim · model-written summary
Irrigation regime did not affect the fatty acid profile.
- Taxon
- OliveOlea europaeat0
- Treatment
- irrigation regimee0
- Outcome
- fatty acidy profilee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fatty acidy profile was not affected by the irrigation regime.”
t0“Olive Oil”
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