Abstract
Abstract 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 (ET c )), and three deficit irrigation strategies (DIS) (regulated (RDI, irrigated with 80% of crop evapotranspiration (ET c ) in phases I and III of fruit growth and 10% of ET c in the pit hardening stage), and two continuous sustained strategies (SDI) – a conventional SDI (27.5% of ET c ), and low‐frequency irrigation adopted by the farmer (SDIAF, 21.2% of ET c ). 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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Claims 11
Claim · model-written summary
All deficit irrigation treatments enhanced leaf tissue density.
- Taxon
- Olive tree
Olea europaeat0 - Treatment
- DIS treatmentse0
- Outcome
- leaf tissue densitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“All DIS treatments enhanced leaf tissue density”
Claim · model-written summary
RDI generally did not affect leaf water status or photosynthetic function.
- Taxon
- Olive treeOlea europaeat0
- Treatment
- RDIe0
- Outcome
- leaf water status and maintained photosynthetic machinery working properlye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“RDI and SDI generally did not affect leaf water status and maintained photosynthetic machinery working properly”
Claim · model-written summary
SDI generally did not affect leaf water status or photosynthetic function.
- Taxon
- Olive treeOlea europaeat0
- Treatment
- SDIe0
- Outcome
- leaf water status and maintained photosynthetic machinery working properlye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“RDI and SDI generally did not affect leaf water status and maintained photosynthetic machinery working properly”
Claim · model-written summary
SDIAF impaired olive physiological indicators.
- Taxon
- Olive treeOlea europaeat0
- Treatment
- SDIAF treatmente0
- Outcome
- olive tree physiological indicatorse0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“the SDIAF treatment impaired olive tree physiological indicators”
Claim · model-written summary
Deficit irrigation maintained leaf primary metabolites.
- Taxon
- Olive treeOlea europaeat0
- Treatment
- DIS treatmentse0
- Outcome
- levels of primary metabolites in leavese0
- Direction
- maintainede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“The DIS treatments maintained the levels of primary metabolites in leaves”
Claim · model-written summary
SDIAF plants showed oxidative stress signs.
- Taxon
- Olive treeOlea europaeat0
- Treatment
- SDIAFe0
- Outcome
- signs of oxidative stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“SDIAF plants showed signs of oxidative stress”
Claim · model-written summary
Deficit irrigation increased total phenolic compounds, ortho-diphenols and flavonoids.
- Taxon
- Olive treeOlea europaeat0
- Organ / stage
- leaves and in fruitse0
- Treatment
- DIS treatmentse0
- Outcome
- total phenolic compounds, ortho ‐diphenols, and flavonoid concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“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”
Claim · model-written summary
Deficit irrigation increased antioxidant capacity.
- Taxon
- Olive treeOlea europaeat0
- Outcome
- total antioxidant capacitye0
- Direction
- highere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“higher total antioxidant capacity”
Claim · model-written summary
Deficit irrigation increased oil content.
- Taxon
- Olive treeOlea europaeat0
- Outcome
- oil contente0
- Direction
- highere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“higher oil content”
Claim · model-written summary
Early harvest is associated with higher oleuropein levels.
- Taxon
- Olive treeOlea europaeat0
- Treatment
- early harveste0
- Outcome
- oleuropein levelse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“an early harvest in order to obtain higher oleuropein levels”
Claim · model-written summary
The authors recommend adequate deficit irrigation for sustainable olive growing.
- Taxon
- Olive treeOlea europaeat0
- Treatment
- Adequate DISe0
- Outcome
- sustainable olive growinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive tree”
e0“Adequate DIS are essential for sustainable olive growing”
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See all 18 papers →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.