Abstract
Abstract An orchard experiment was conducted during two successive years to evaluate the effectiveness of the foliar application of zinc (Zn) in mineral form (ZnSO 4 ) or chelated with various amino acids (AAC) on the oil content, qualitative indices, and fatty acid profile of olive oil. All Zn sources were applied at a rate of 0.2% during two growth stages; at full bloom (FB) and 15 days after FB. The results showed that Zn, regardless of applied sources, accumulated more Zn in leaves and fruits compared to the control. The effectiveness of Zn‐AAC in increasing leaf and fruit Zn concentration was higher than ZnSO 4 . In both years, an increase in oil content and concentration of phenolic compounds and chlorophyll in the oil was observed when trees were treated with Zn, although these effects were dependent on the Zn sources. In general, the Zn‐AAC treatments, especially Zn‐methionine (Met), was more effective than ZnSO 4 . Zn‐AAC treatments increased the L* value and b* intensity, while decreasing the a* value of olive oil compared to the control. However, ZnSO 4 had a slight or no significant effect on oil color. The oil fatty acid profile was also affected by Zn. The Zn‐Met and Zn‐Glycine (Gly) were more effective than the other Zn sources in increasing monounsaturated fatty acid, specifically oleic acid of oil in both years, respectively. These results could suggest that the application of Zn‐AAC, especially Zn‐Met and Zn‐Gly, can be considered as a new strategy to improve olive oil quality and quantity in Zn‐deficient soils.
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Claims 13
Claim · model-written summary
Foliar zinc increased leaf and fruit zinc accumulation relative to control.
- Taxon
- Olive
Olea europaeat0 - Treatment
- Zne0
- Outcome
- Zn in leaves and fruitse0
- Direction
- moree0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn, regardless of applied sources, accumulated more Zn in leaves and fruits compared to the control.”
t0“Olive Oil”
Claim · model-written summary
Zinc amino acid complexes increased leaf and fruit zinc concentrations more than zinc sulfate.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zn‐AACe0
- Outcome
- leaf and fruit Zn concentratione0
- Direction
- highere0
- Comparator
- ZnSO 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effectiveness of Zn‐AAC in increasing leaf and fruit Zn concentration was higher than ZnSO 4 .”
t0“Olive Oil”
Claim · model-written summary
Foliar zinc increased olive oil content in both years, dependent on zinc source.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zne0
- Outcome
- oil contente0
- Direction
- increasee0
- Qualifier
- dependent on the Zn sourcese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both years, an increase in oil content and concentration of phenolic compounds and chlorophyll in the oil was observed when trees were treated with Zn, although these effects were dependent on the Zn sources.”
t0“Olive Oil”
Claim · model-written summary
Foliar zinc increased phenolic compound concentration in olive oil in both years.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zne0
- Outcome
- concentration of phenolic compoundse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both years, an increase in oil content and concentration of phenolic compounds and chlorophyll in the oil was observed when trees were treated with Zn, although these effects were dependent on the Zn sources.”
t0“Olive Oil”
Claim · model-written summary
Foliar zinc increased chlorophyll concentration in olive oil in both years.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zne0
- Outcome
- chlorophyll in the oile0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both years, an increase in oil content and concentration of phenolic compounds and chlorophyll in the oil was observed when trees were treated with Zn, although these effects were dependent on the Zn sources.”
t0“Olive Oil”
Claim · model-written summary
Zinc amino acid complexes, especially zinc methionine, were more effective than zinc sulfate.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zn‐AAC treatmentse0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Comparator
- ZnSO 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, the Zn‐AAC treatments, especially Zn‐methionine (Met), was more effective than ZnSO 4 .”
t0“Olive Oil”
Claim · model-written summary
Zinc amino acid complexes increased olive oil L* and b* color values compared with control.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zn‐AAC treatmentse0
- Outcome
- L* value and b* intensitye0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn‐AAC treatments increased the L* value and b* intensity, while decreasing the a* value of olive oil compared to the control.”
t0“Olive Oil”
Claim · model-written summary
Zinc amino acid complexes decreased olive oil a* color value compared with control.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zn‐AAC treatmentse0
- Outcome
- a* value of olive oile0
- Direction
- decreasinge0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn‐AAC treatments increased the L* value and b* intensity, while decreasing the a* value of olive oil compared to the control.”
t0“Olive Oil”
Claim · model-written summary
Zinc sulfate had slight or nonsignificant effects on olive oil color.
- Taxon
- OliveOlea europaeat0
- Treatment
- ZnSO 4e0
- Outcome
- oil colore0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ZnSO 4 had a slight or no significant effect on oil color.”
t0“Olive Oil”
Claim · model-written summary
Foliar zinc changed the olive oil fatty acid profile.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zne0
- Outcome
- oil fatty acid profilee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The oil fatty acid profile was also affected by Zn.”
t0“Olive Oil”
Claim · model-written summary
Zinc methionine increased monounsaturated fatty acid content more effectively than other zinc sources.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zn‐Mete0
- Outcome
- monounsaturated fatty acide0
- Direction
- increasinge0
- Comparator
- other Zn sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Zn‐Met and Zn‐Glycine (Gly) were more effective than the other Zn sources in increasing monounsaturated fatty acid, specifically oleic acid of oil in both years, respectively.”
t0“Olive Oil”
Claim · model-written summary
Zinc glycine increased oleic acid content more effectively than other zinc sources.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zn‐Glycinee0
- Outcome
- oleic acid of oile0
- Direction
- increasinge0
- Comparator
- other Zn sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Zn‐Met and Zn‐Glycine (Gly) were more effective than the other Zn sources in increasing monounsaturated fatty acid, specifically oleic acid of oil in both years, respectively.”
t0“Olive Oil”
Claim · model-written summary
The authors propose zinc amino acid complexes, especially zinc methionine and zinc glycine, for improving olive oil quality and quantity in zinc deficient soils.
- Taxon
- OliveOlea europaeat0
- Treatment
- Zn‐AACe0
- Outcome
- improve olive oil quality and quantitye0
- Qualifier
- Zn‐deficient soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of Zn‐AAC, especially Zn‐Met and Zn‐Gly, can be considered as a new strategy to improve olive oil quality and quantity in Zn‐deficient soils.”
t0“Olive Oil”
The same questions in other papers
zinc atom · quality: oil · Olea europaea (common olive)Results agree
1 paper in the same direction as this paper
- positive
zinc atom · physiology: pigments · Olea europaea (common olive)Results agree
1 paper in the same direction as this paper
- positive
zinc atom · nutrient: content · Olea europaea (common olive)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.