Abstract
The present study was conducted during two consecutive seasons (2024 and 2025) in a private vineyard located in the El-Nubaria region, El-Beheira governorate, Egypt. Nine-year-old Thompson Seedless grapevines, trained on the Gable system, spaced 2 × 3 meters apart in sandy soil and irrigated using a drip irrigation system were used for this trial. Eight treatments, including proline, phenylalanine, abscisic acid were applied alone or combined with gibberellic acid, along with an untreated control to evaluate their implication on vegetative growth, yield, and the physicochemical characteristics of the berries. The results demonstrated that all treatments significantly improved vine vigor and yield attributes compared with the control. The GA₃ + proline treatment produced the highest values for vegetative growth traits, including shoot length, leaf number, leaf area, and leaf chlorophyll content in the leaves, as well as yield and cluster physical characteristics such as cluster weight and berry size. All proline, phenylalanine and abscisic acid applications accelerated berry ripening of “Thompson Seedless” grapevines treated with gibberellic acid, particularly, proline treatment, which achieved the highest improvements in berry chemical traits, recording the greatest total soluble solids (TSS) and TSS/acid ratio as well as the lowest acidity.
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Claims 9
Claim · model-written summary
All treatments improved vine vigor and yield attributes relative to control.
- Treatment
- all treatmentse0
- Outcome
- vine vigor and yield attributese0
- Direction
- improvede0
- Comparator
- the controle0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all treatments significantly improved vine vigor and yield attributes compared with the control.”
t0““Thompson Seedless” Grapevines”
Claim · model-written summary
GA3 plus proline gave the highest shoot length, leaf number and leaf area.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The GA₃ + proline treatment produced the highest values for vegetative growth traits, including shoot length, leaf number, leaf area, and leaf chlorophyll content in the leaves, as well as yield and cluster physical characteristics such as cluster weight and berry size.”
t0““Thompson Seedless” Grapevines”
Claim · model-written summary
GA3 plus proline gave the highest leaf chlorophyll content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The GA₃ + proline treatment produced the highest values for vegetative growth traits, including shoot length, leaf number, leaf area, and leaf chlorophyll content in the leaves, as well as yield and cluster physical characteristics such as cluster weight and berry size.”
t0““Thompson Seedless” Grapevines”
Claim · model-written summary
GA3 plus proline gave the highest yield, cluster weight and berry size.
- Treatment
- GA₃ + proline treatmente0
- Outcome
- yield and cluster physical characteristics such as cluster weight and berry sizee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The GA₃ + proline treatment produced the highest values for vegetative growth traits, including shoot length, leaf number, leaf area, and leaf chlorophyll content in the leaves, as well as yield and cluster physical characteristics such as cluster weight and berry size.”
t0““Thompson Seedless” Grapevines”
Claim · model-written summary
Proline accelerated berry ripening in GA treated grapevines.
- Taxon
- “Thompson Seedless” grapevinese0
- Treatment
- prolinee0
- Outcome
- berry ripeninge0
- Direction
- acceleratede0
Not reportedComparator
Verbatim
e0“All proline, phenylalanine and abscisic acid applications accelerated berry ripening of “Thompson Seedless” grapevines treated with gibberellic acid”
Claim · model-written summary
Phenylalanine accelerated berry ripening in GA treated grapevines.
- Taxon
- “Thompson Seedless” grapevinese0
- Treatment
- phenylalaninee0
- Outcome
- berry ripeninge0
- Direction
- acceleratede0
Not reportedComparator
Verbatim
e0“All proline, phenylalanine and abscisic acid applications accelerated berry ripening of “Thompson Seedless” grapevines treated with gibberellic acid”
Claim · model-written summary
Abscisic acid accelerated berry ripening in GA treated grapevines.
- Taxon
- “Thompson Seedless” grapevinese0
- Treatment
- abscisic acide0
- Outcome
- berry ripeninge0
- Direction
- acceleratede0
Not reportedComparator
Verbatim
e0“All proline, phenylalanine and abscisic acid applications accelerated berry ripening of “Thompson Seedless” grapevines treated with gibberellic acid”
Claim · model-written summary
Proline gave the greatest soluble solids and solids-to-acid ratio.
- Treatment
- proline treatmente0
- Outcome
- total soluble solids (TSS) and TSS/acid ratioe0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline treatment, which achieved the highest improvements in berry chemical traits, recording the greatest total soluble solids (TSS) and TSS/acid ratio as well as the lowest acidity.”
t0““Thompson Seedless” Grapevines”
Claim · model-written summary
Proline gave the lowest berry acidity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proline treatment, which achieved the highest improvements in berry chemical traits, recording the greatest total soluble solids (TSS) and TSS/acid ratio as well as the lowest acidity.”
t0““Thompson Seedless” Grapevines”
The same questions in other papers
Gibberellic acid · growth · VitisResults differ
25 papers in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
30 papers more in this group
See all 34 papers →Gibberellic acid · yield · VitisResults differ
38 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
43 papers more in this group
See all 47 papers →proline · growth · VitisPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
proline · physiology: pigments · VitisResults agree
1 paper in the same direction as this paper
- positive
proline · quality: sugar starch · VitisResults agree
1 paper in the same direction as this paper
- positive
Gibberellic acid · physiology: pigments · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
proline · yield · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
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.