Abstract
Given that Brazilian pear production is unable to meet the annual demand, to consider the possible expansion to non traditional growing regions, turns interesting. Even though under tropical semi-arid conditions pear trees have vigorous vegetative growth, a negative influence on flower bud differentiation and formation affects fruit yield. Our study aimed to evaluate the inhibition efficiency of paclobutrazol (PBZ) on gibberellin biosynthesis, vegetative growth, and carbohydrate production in two pear-treecultivars (‘Santa Maria’ and ‘Hosui’) grown under semi-arid conditions. To this end, two experiments were conducted, one for each pear-tree cultivar. The experimental designs consisted of randomized blocks, with factorial arrangement (5x2x4), corresponding to PBZ doses (0.0, 0.5, 1.0, 1.5, and 2.0 g per linear meter of plant canopy), PBZ application forms (soil and foliar), and evaluation dates (30, 60, 90, and 120 days after application). Both soil and foliar applications inhibited gibberellin biosynthesis in both cultivars, especially after 120 days of application. PBZ affected leaf total soluble carbohydrates and reduced sprout growth in both cultivars. Although PBZ can be potentially used in pear management, further studies are still required to determine specific management practices in tropical semi-arid zones. Highlights: Inhibition of gibberellin biosynthesis is more efficient with soil application of paclobutrazol. Soil application of paclobutrazol results in greater production of carbohydrates. There is a difference in sensitivity to the effects of paclobutrazol among pear varieties. The non-application of paclobutrazol results in late maturation of the branches, compromising floral induction.
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Claims 8
Claim · model-written summary
Soil and foliar paclobutrazol applications inhibited gibberellin biosynthesis in both pear cultivars, especially after 120 days.
- Taxon
- pear trees
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communist0 - Treatment
- soil and foliar applicationse1
- Outcome
- gibberellin biosynthesise1
- Direction
- inhibitede1
- Qualifier
- especially after 120 days of applicatione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
t0“pear trees grown in tropical semiarid”
e1“Both soil and foliar applications inhibited gibberellin biosynthesis in both cultivars, especially after 120 days of application”
Claim · model-written summary
Paclobutrazol affected leaf total soluble carbohydrates in both pear cultivars; the direction of the effect is not stated.
- Taxon
- pear treesPyrus communist0
- Treatment
- PBZe2
- Outcome
- leaf total soluble carbohydratese2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pear trees grown in tropical semiarid”
e2“PBZ affected leaf total soluble carbohydrates and reduced sprout growth in both cultivars”
Claim · model-written summary
Paclobutrazol reduced sprout growth in both pear cultivars.
- Taxon
- pear treesPyrus communist0
- Treatment
- PBZe2
- Outcome
- sprout growthe2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pear trees grown in tropical semiarid”
e2“PBZ affected leaf total soluble carbohydrates and reduced sprout growth in both cultivars”
Claim · model-written summary
Soil application of paclobutrazol resulted in greater production of carbohydrates in pear.
- Taxon
- pear treesPyrus communist0
- Treatment
- Soil application of paclobutrazole4
- Outcome
- production of carbohydratese4
- Direction
- greatere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pear trees grown in tropical semiarid”
e4“Soil application of paclobutrazol results in greater production of carbohydrates”
Claim · model-written summary
Inhibition of gibberellin biosynthesis is more efficient with soil than with foliar paclobutrazol application in pear.
- Taxon
- pear treesPyrus communist0
- Treatment
- soil application of paclobutrazole5
- Outcome
- Inhibition of gibberellin biosynthesise5
- Direction
- more efficiente5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pear trees grown in tropical semiarid”
e5“Inhibition of gibberellin biosynthesis is more efficient with soil application of paclobutrazol”
Claim · model-written summary
The pear varieties differ in sensitivity to the effects of paclobutrazol.
- Taxon
- pear treesPyrus communist0
- Material
- pear varietiese6
- Treatment
- paclobutrazole6
- Outcome
- sensitivity to the effects of paclobutrazole6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pear trees grown in tropical semiarid”
e6“There is a difference in sensitivity to the effects of paclobutrazol among pear varieties”
Claim · model-written summary
Non-application of paclobutrazol results in late maturation of the branches, compromising floral induction in pear.
- Taxon
- pear treesPyrus communist0
- Treatment
- non-application of paclobutrazole7
- Outcome
- maturation of the branchese7
- Direction
- latee7
- Qualifier
- compromising floral inductione7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pear trees grown in tropical semiarid”
e7“The non-application of paclobutrazol results in late maturation of the branches, compromising floral induction”
Claim · model-written summary
Paclobutrazol can potentially be used in pear management, but further studies are needed to set specific practices in tropical semi-arid zones.
- Taxon
- pear treesPyrus communist0
- Treatment
- PBZe1
- Outcome
- used in pear managemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“pear trees grown in tropical semiarid”
e1“PBZ can be potentially used in pear management”
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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.