Abstract
Background and Aims: Partial rootzone drying (PRD) is an irrigation system that permits better control of vegetative growth without reducing fruit yield. However, little is known about how grapevine reproductive development is regulated when irrigated under PRD. Therefore, the aim of this work was to investigate the relationship between abscisic acid (ABA) and polyamines (PAs) in leaves and berries during ripening, and how hormonal balance is affected under different irrigation regimes. Methods and Results: The study was carried out using container-grown Superior Seedless grapevines with a split-root system and grown under controlled conditions in a greenhouse. Three irrigation treatments were imposed: control (well watered), and two forms of deficit irrigation – PRD and sustained deficit irrigation (SDI). PRD plants have higher yield and berry size than SDI vines. At the onset of veraison, PRD berries have higher ABA, free PAs and free to bound PA ratio than other treatments. Conclusions: Although the restriction of vegetative growth in PRD might be partly a response to the volume of water applied and therefore similar to a SDI response, our results suggest that specific hormonal factors may explain the effects on reproductive growth and yield. Significance of the Study: The study demonstrates that changes induced in berry ABA during PRD conditions could be counterbalanced by changes in PA metabolism so that berry size and yield are maintained.
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Claims 7
Claim · model-written summary
PRD vines yielded more than SDI vines.
- Taxon
- Vitis vinifera
Vitis viniferat0 - Treatment
- PRDe0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- SDI vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“PRD plants have higher yield and berry size than SDI vines.”
Claim · model-written summary
PRD berries were larger than SDI berries.
- Taxon
- Vitis viniferaVitis viniferat0
- Treatment
- PRDe0
- Outcome
- berry sizee0
- Direction
- highere0
- Comparator
- SDI vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“PRD plants have higher yield and berry size than SDI vines.”
Claim · model-written summary
At veraison PRD berries had higher ABA than other treatments.
- Taxon
- Vitis viniferaVitis viniferat0
- Organ / stage
- berriese0
- Treatment
- PRDe0
- Outcome
- ABAe0
- Direction
- highere0
- Qualifier
- At the onset of veraisone0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“At the onset of veraison, PRD berries have higher ABA, free PAs and free to bound PA ratio than other treatments.”
Claim · model-written summary
At veraison PRD berries had higher free PAs than other treatments.
- Taxon
- Vitis viniferaVitis viniferat0
- Organ / stage
- berriese0
- Treatment
- PRDe0
- Outcome
- free PAse0
- Direction
- highere0
- Qualifier
- At the onset of veraisone0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“At the onset of veraison, PRD berries have higher ABA, free PAs and free to bound PA ratio than other treatments.”
Claim · model-written summary
At veraison PRD berries had a higher free to bound PA ratio than other treatments.
- Taxon
- Vitis viniferaVitis viniferat0
- Organ / stage
- berriese0
- Treatment
- PRDe0
- Outcome
- free to bound PA ratioe0
- Direction
- highere0
- Qualifier
- At the onset of veraisone0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“At the onset of veraison, PRD berries have higher ABA, free PAs and free to bound PA ratio than other treatments.”
Claim · model-written summary
The authors suggest hormonal factors may explain PRD effects on reproductive growth and yield.
- Taxon
- Vitis viniferaVitis viniferat0
- Outcome
- reproductive growth and yielde0
- Qualifier
- specific hormonal factorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“our results suggest that specific hormonal factors may explain the effects on reproductive growth and yield”
Claim · model-written summary
The authors suggest PA metabolism changes could counterbalance ABA changes to maintain berry size and yield under PRD.
- Taxon
- Vitis viniferaVitis viniferat0
- Compound
- ABAe0
- Outcome
- berry size and yield are maintainede0
- Qualifier
- changes in PA metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Vitis vinifera”
e0“changes induced in berry ABA during PRD conditions could be counterbalanced by changes in PA metabolism so that berry size and yield are maintained”
The same questions in other papers
processing · yield · Vitis vinifera (wine grape)Positive and negative results
2 in the opposite direction
- negative
- no effect
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.