Abstract
Partial rootzone drying (PRD) is an irrigation management technique designed to reduce water use in grapevines without a decline in yield, thereby increasing water use efficiency (WUE). Experiments consisted of field-grown Cabernet Sauvignon, where the PRD grapevines were irrigated with half the amount of water as control grapevines, and Shiraz, where the PRD grapevines received the same amount of water as control grapevines. PRD treatments showed no significant differences in yield or berry composition at harvest, except that PRD grapevines that received half the amount of water had significantly smaller berries than control grapevines. Cabernet Sauvignon PRD grapevines receiving half the amount of water as control grapevines showed a 34 % reduction in main shoot growth and up to a 74% reduction in lateral shoot growth. Shoot growth was inhibited to a lesser extent in Shiraz PRD grapevines receiving the same amount of water, with a 20% reduction in main shoot.growth and a 33% reduction in lateral shoot growth. PRD also significantly reduced stomatal conductance in Cabernet Sauvignon on average by 31 % and 16% in Shiraz. Nitrate reductase (NR) activity in grapevine leaves was significantly lowered in response to PRD, irrespective of the amount of water applied. The reduction in NR activity was closely correlated with the development of the PRD cycle and the associated reduction in stomatal conductance.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
PRD did not significantly change yield.
Not reportedTaxonComparator
Verbatim
e0“PRD treatments showed no significant differences in yield or berry composition at harvest”
Claim · model-written summary
PRD did not significantly change berry composition at harvest.
Not reportedTaxonComparator
Verbatim
e0“PRD treatments showed no significant differences in yield or berry composition at harvest”
Claim · model-written summary
Half-water PRD grapevines had significantly smaller berries than controls.
- Treatment
- PRD grapevines that received half the amount of watere0
- Outcome
- berriese0
- Direction
- smallere0
- Comparator
- control grapevinese0
Not reportedTaxon
Verbatim
e0“PRD grapevines that received half the amount of water had significantly smaller berries than control grapevines”
Claim · model-written summary
Cabernet Sauvignon PRD reduced main shoot growth by 34%.
- Material
- Cabernet Sauvignone0
- Treatment
- PRD grapevines receiving half the amount of watere0
- Outcome
- main shoot growthe0
- Direction
- reductione0
- Value
- 34 %e0
- Comparator
- control grapevinese0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cabernet Sauvignon PRD grapevines receiving half the amount of water as control grapevines showed a 34 % reduction in main shoot growth and up to a 74% reduction in lateral shoot growth”
Claim · model-written summary
Cabernet Sauvignon PRD reduced lateral shoot growth by up to 74%.
- Material
- Cabernet Sauvignone0
- Treatment
- PRD grapevines receiving half the amount of watere0
- Outcome
- lateral shoot growthe0
- Direction
- reductione0
- Value
- 74%e0
- Comparator
- control grapevinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cabernet Sauvignon PRD grapevines receiving half the amount of water as control grapevines showed a 34 % reduction in main shoot growth and up to a 74% reduction in lateral shoot growth”
Claim · model-written summary
Shiraz PRD reduced main shoot growth by 20%.
- Material
- Shiraze0
- Treatment
- PRD grapevines receiving the same amount of watere0
- Outcome
- main shoot.growthe0
- Direction
- reductione0
- Value
- 20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot growth was inhibited to a lesser extent in Shiraz PRD grapevines receiving the same amount of water, with a 20% reduction in main shoot.growth and a 33% reduction in lateral shoot growth”
Claim · model-written summary
Shiraz PRD reduced lateral shoot growth by 33%.
- Material
- Shiraze0
- Treatment
- PRD grapevines receiving the same amount of watere0
- Outcome
- lateral shoot growthe0
- Direction
- reductione0
- Value
- 33%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot growth was inhibited to a lesser extent in Shiraz PRD grapevines receiving the same amount of water, with a 20% reduction in main shoot.growth and a 33% reduction in lateral shoot growth”
Claim · model-written summary
PRD reduced Cabernet Sauvignon stomatal conductance by 31% on average.
- Material
- Cabernet Sauvignone0
- Treatment
- PRDe0
- Outcome
- stomatal conductancee0
- Direction
- reducede0
- Value
- 31 %e0
Not reportedTaxonComparator
Verbatim
e0“PRD also significantly reduced stomatal conductance in Cabernet Sauvignon on average by 31 % and 16% in Shiraz”
Claim · model-written summary
PRD reduced Shiraz stomatal conductance by 16%.
Not reportedTaxonComparator
Verbatim
e0“PRD also significantly reduced stomatal conductance in Cabernet Sauvignon on average by 31 % and 16% in Shiraz”
Claim · model-written summary
PRD lowered leaf nitrate reductase activity irrespective of water amount.
- Organ / stage
- leavese0
- Treatment
- PRDe0
- Gene
- Nitrate reductase (NR)e0
- Outcome
- Nitrate reductase (NR) activitye0
- Direction
- lowerede0
- Qualifier
- irrespective of the amount of water appliede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate reductase (NR) activity in grapevine leaves was significantly lowered in response to PRD, irrespective of the amount of water applied”
Claim · model-written summary
Reduced leaf NR activity was closely correlated with the PRD cycle.
Not reportedTaxonDirection
Verbatim
e0“The reduction in NR activity was closely correlated with the development of the PRD cycle and the associated reduction in stomatal conductance”
Claim · model-written summary
Reduced leaf NR activity was closely correlated with reduced stomatal conductance.
- Outcome
- reduction in NR activitye0
- Qualifier
- reduction in stomatal conductancee0
- Comparator
- reduction in stomatal conductancee0
Not reportedTaxonDirection
Verbatim
e0“The reduction in NR activity was closely correlated with the development of the PRD cycle and the associated reduction in stomatal conductance”
The same questions in other papers
processing · growth · VitisPositive and negative results
3 in the opposite direction
- positive
- positive
- positive
processing · quality: general · VitisPositive and negative results
3 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →processing · yield · VitisPositive and negative results
5 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 papers →processing · physiology: gas exchange · VitisResults agree
1 paper in the same direction as this paper
- negative
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.