Abstract
Foliar sprays of growth regulators have commercial potential for improving the performance of some of the parameters associated with alternate bearing in pecan trees. The objective was to evaluate the behaviour of alternate bearing through analysis of seasonal variations in buds and leaflets of non-structural carbohydrates (glucose, fructose, sucrose, and starch), mineral nutrients (N-total, P, K+, Ca2+, Mg2+, Fe2+, Cu2+, Mn2+ and Zn2+), yield components (nut weight per kilogram and kernel percentage) and oxidative metabolism (superoxide dismutase, hydrogen peroxide, catalase, guaiacol peroxidase and antioxidant capacity) in cv. Wichita pecan trees in response to foliar applications of gibberellic acid (50 mg L−1), calcium prohexadione (500 mg L−1) or thidiazuron (10 mg L−1). The experiment was of a completely randomized experimental design with five replicates. Foliar growth regulator (GRs) sprays help maintain the concentration of non-structural carbohydrates in the leaflets and buds between the evaluation years. With the exception of K+ (12.9 and 10.9 g kg−1) and Zn2+ (45.1 and 30.5 mg kg−1), the GRs did not show any effects on the concentrations of the foliar mineral nutrients. The results suggest foliar sprays of gibberellic acid improve the performance of parameters associated with alternate bearing, including oxidative metabolism.
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Claims 5
Claim · model-written summary
Growth regulator sprays helped maintain non-structural carbohydrate concentration in leaflets and buds between years.
- Taxon
- Pecan Trees
_1_(24790682337).jpg?width=60)
Carya illinoinensist0 - Organ / stage
- leaflets and budse0
- Treatment
- Foliar growth regulator (GRs) sprayse0
- Outcome
- concentration of non-structural carbohydratese0
- Direction
- maintaine0
- Comparator
- between the evaluation yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_1_(24790682337).jpg?width=500)
Verbatim
e0“Foliar growth regulator (GRs) sprays help maintain the concentration of non-structural carbohydrates in the leaflets and buds between the evaluation years”
t0“Pecan Trees”
Claim · model-written summary
Growth regulators affected foliar potassium concentration, with reported values 12.9 and 10.9 g kg−1.
- Taxon
- Pecan TreesCarya illinoinensist0
- Treatment
- GRse0
- Outcome
- K+e0
- Value
- 12.9 and 10.9 g kg−1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the exception of K+ (12.9 and 10.9 g kg−1) and Zn2+ (45.1 and 30.5 mg kg−1), the GRs did not show any effects on the concentrations of the foliar mineral nutrients”
t0“Pecan Trees”
Claim · model-written summary
Growth regulators affected foliar zinc concentration, with reported values 45.1 and 30.5 mg kg−1.
- Taxon
- Pecan TreesCarya illinoinensist0
- Treatment
- GRse0
- Outcome
- Zn2+e0
- Value
- 45.1 and 30.5 mg kg−1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the exception of K+ (12.9 and 10.9 g kg−1) and Zn2+ (45.1 and 30.5 mg kg−1), the GRs did not show any effects on the concentrations of the foliar mineral nutrients”
t0“Pecan Trees”
Claim · model-written summary
Growth regulators showed no effect on the other foliar mineral nutrient concentrations.
- Taxon
- Pecan TreesCarya illinoinensist0
- Treatment
- GRse0
- Outcome
- concentrations of the foliar mineral nutrientse0
- Direction
- did not show any effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the GRs did not show any effects on the concentrations of the foliar mineral nutrients”
t0“Pecan Trees”
Claim · model-written summary
The authors suggest gibberellic acid sprays improve alternate bearing associated parameters, including oxidative metabolism.
- Taxon
- Pecan TreesCarya illinoinensist0
- Treatment
- foliar sprays of gibberellic acide0
- Outcome
- oxidative metabolisme0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar sprays of gibberellic acid improve the performance of parameters associated with alternate bearing, including oxidative metabolism”
t0“Pecan Trees”
The same questions in other papers
application · molecular: metabolites · Carya illinoinensis (pecan)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
application · quality: sugar starch · Carya illinoinensis (pecan)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- positive
- no effect
1 paper more in this group
See all 5 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.