Abstract
In the absence of dwarfing rootstocks for apricot, techniques which reduce vegetative growth are important in the orchard management system. A number of techniques may be employed to moderate vegetative vigour of fruit trees. In the orchard in the humid climate of Palmerston North, New Zealand, five-year-old vigorousSundrop' apricot trees on `Golden Queen' peach seedlings trained on Tatura trellis at 2000 tree ha -1 were used. The treatments were regulated deficit irrigation (RDI), dormant root-pruning, soil applied Paclobutrazol (PBZ) and untreated control. The objectives were to examine the effects of these treatments on the internal water relations of apricot. Also, to determine whether the mechanism of response to root pruning appeared similar to the mechanism of response to water stress. Throughout the season treatment effects on vegetative, reproductive growth and leaf physiology of the trees were monitored. Predawn and midday xylem water potential (Ψ xylem) in root pruned and water stressed trees were lower than in control trees, but Cultar treatments did not significantly affect this. PBZ treated trees had the same water status as controls. Root-pruned trees developed an increased internal water deficit in the leaves and fruits especially at the time of highest water demand during fruit stage III.
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Claims 5
Claim · model-written summary
root pruned apricot trees had lower predawn and midday xylem water potential than controls.
- Taxon
- APRICOT
Prunus armeniacat0 - Treatment
- root prunede0
- Outcome
- Predawn and midday xylem water potentiale0
- Direction
- lowere0
- Comparator
- control treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Predawn and midday xylem water potential (Ψ xylem) in root pruned and water stressed trees were lower than in control trees, but Cultar treatments did not significantly affect this.”
t0“APRICOT TREES”
Claim · model-written summary
water stressed apricot trees had lower predawn and midday xylem water potential than controls.
- Taxon
- APRICOTPrunus armeniacat0
- Treatment
- water stressede0
- Outcome
- Predawn and midday xylem water potentiale0
- Direction
- lowere0
- Comparator
- control treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Predawn and midday xylem water potential (Ψ xylem) in root pruned and water stressed trees were lower than in control trees, but Cultar treatments did not significantly affect this.”
t0“APRICOT TREES”
Claim · model-written summary
Cultar did not significantly affect apricot xylem water potential.
- Taxon
- APRICOTPrunus armeniacat0
- Treatment
- Cultar treatmentse0
- Outcome
- xylem water potentiale0
- Comparator
- control treese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Predawn and midday xylem water potential (Ψ xylem) in root pruned and water stressed trees were lower than in control trees, but Cultar treatments did not significantly affect this.”
t0“APRICOT TREES”
Claim · model-written summary
PBZ treated apricot trees had the same water status as controls.
- Taxon
- APRICOTPrunus armeniacat0
- Treatment
- PBZe0
- Outcome
- water statuse0
- Direction
- samee0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ treated trees had the same water status as controls.”
t0“APRICOT TREES”
Claim · model-written summary
Root pruning increased internal water deficit in apricot leaves and fruits, especially during fruit stage III.
- Taxon
- APRICOTPrunus armeniacat0
- Organ / stage
- leaves and fruitse0
- Treatment
- Root-prunede0
- Outcome
- internal water deficite0
- Direction
- increasede0
- Qualifier
- fruit stage IIIe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root-pruned trees developed an increased internal water deficit in the leaves and fruits especially at the time of highest water demand during fruit stage III.”
t0“APRICOT TREES”
The same questions in other papers
drought · physiology: water · Prunus armeniaca (apricot)Results agree
5 papers in the same direction as this paper
- no effect
- negative
- negative
2 papers more in this group
See all 6 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.