Paper · 2025 · Journal of Plant Production

Impact of Spraying ‘Early Sweet’ Grapevines with Gibberellic Acid and Urea for Reducing Shot Berries Percentage and Improving Yield and Cluster Quality

Doaa M. Hamza

12
claims
24
verbatim quotes
0
citations
2
research areas
✓
Open access · cc-by

Abstract

The presence of shot berries in the Early Sweet grapevine cultivar poses a considerable challenge that negatively affects grapevine productivity and fruit quality, making it crucial to find certain treatments to minimize their prevalence and increase grapevine yield. Field experiments were conducted at Horticulture Research Institute experimental farm, Mansoura, Egypt, using a completely randomized block design with three replicates during 2021 and 2022 successive seasons. The experiment includes five treatments i.e., T1) control, spraying only with tap water; T2) spraying with 1 ppm gibberellic acid (GA₃) and 0.5 g/L low biuret urea twice during full bloom and at 25% fruit set; T3) same as T2 plus spraying with 10 ppm GA₃ at 7-8 mm berries diameter; T4) same as T2 plus spraying with 10 ppm GA₃ and 20 ppm GA₃ at 7-8 mm and 10-12 mm berries diameter respectively, and T5) same as T2 plus spraying with 20 ppm GA₃ at 10-12 mm berries diameter. The findings showed that spraying GA₃ along with urea during different growth stages significantly boosted both yield and quality of berries compared to control treatment. However, treatments of GA₃ and urea, particularly (1–10 ppm and 1–20 ppm), resulted in higher acidity levels and a slight reduction in soluble solid content (SSC) and SSC/acid ratios. Among the treatments, T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

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Claims 12

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

GA₃ with urea boosted yield compared with the control.

Taxon
GrapevinesVitist0
Treatment
GA₃ along with ureae0
Outcome
yielde0
Direction
boostede0
Comparator
control treatmente0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“spraying GA₃ along with urea during different growth stages significantly boosted both yield and quality of berries compared to control treatment”

✓ located verbatim in the source · abstract, characters 979–1124 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

GA₃ with urea boosted quality of berries compared with the control.

Taxon
GrapevinesVitist0
Treatment
GA₃ along with ureae0
Outcome
quality of berriese0
Direction
boostede0
Comparator
control treatmente0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“spraying GA₃ along with urea during different growth stages significantly boosted both yield and quality of berries compared to control treatment”

✓ located verbatim in the source · abstract, characters 979–1124 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

GA₃ and urea treatments, particularly 1–10 and 1–20 ppm, produced higher acidity levels.

Taxon
GrapevinesVitist0
Treatment
treatments of GA₃ and ureae0
Outcome
acidity levelse0
Direction
highere0
Qualifier
particularly (1–10 ppm and 1–20 ppm)e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“treatments of GA₃ and urea, particularly (1–10 ppm and 1–20 ppm), resulted in higher acidity levels and a slight reduction in soluble solid content (SSC) and SSC/acid ratios”

✓ located verbatim in the source · abstract, characters 1135–1308 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

GA₃ and urea treatments, particularly 1–10 and 1–20 ppm, produced reduction soluble solid content (SSC).

Taxon
GrapevinesVitist0
Treatment
treatments of GA₃ and ureae0
Outcome
soluble solid content (SSC)e0
Direction
reductione0
Qualifier
particularly (1–10 ppm and 1–20 ppm)e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“treatments of GA₃ and urea, particularly (1–10 ppm and 1–20 ppm), resulted in higher acidity levels and a slight reduction in soluble solid content (SSC) and SSC/acid ratios”

✓ located verbatim in the source · abstract, characters 1135–1308 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

GA₃ and urea treatments, particularly 1–10 and 1–20 ppm, produced reduction SSC/acid ratios.

Taxon
GrapevinesVitist0
Treatment
treatments of GA₃ and ureae0
Outcome
SSC/acid ratiose0
Direction
reductione0
Qualifier
particularly (1–10 ppm and 1–20 ppm)e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“treatments of GA₃ and urea, particularly (1–10 ppm and 1–20 ppm), resulted in higher acidity levels and a slight reduction in soluble solid content (SSC) and SSC/acid ratios”

✓ located verbatim in the source · abstract, characters 1135–1308 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

T4 produced lowest in percentages of shot berries.

Taxon
GrapevinesVitist0
Treatment
T4e0
Outcome
percentages of shot berriese0
Direction
loweste0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin”

✓ located verbatim in the source · abstract, characters 1332–1580 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

T4 produced increase in yield.

Taxon
GrapevinesVitist0
Treatment
T4e0
Outcome
yielde0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin”

✓ located verbatim in the source · abstract, characters 1332–1580 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

T4 produced increase in cluster weight.

Taxon
GrapevinesVitist0
Treatment
T4e0
Outcome
cluster weighte0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin”

✓ located verbatim in the source · abstract, characters 1332–1580 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

T4 produced increase in berry weight.

Taxon
GrapevinesVitist0
Treatment
T4e0
Outcome
berry weighte0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin”

✓ located verbatim in the source · abstract, characters 1332–1580 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

T4 produced increase in diameter.

Taxon
GrapevinesVitist0
Treatment
T4e0
Outcome
diametere0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin”

✓ located verbatim in the source · abstract, characters 1332–1580 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

T4 produced increase in total chlorophyll concentration in berry skin.

Taxon
GrapevinesVitist0
Treatment
T4e0
Outcome
total chlorophyll concentration in berry skine0
Direction
increasee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin”

✓ located verbatim in the source · abstract, characters 1332–1580 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

T4 produced reducing in total carotenoid concentration in berry skin.

Taxon
GrapevinesVitist0
Treatment
T4e0
Outcome
total carotenoid concentration in berry skine0
Direction
reducinge0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vitis
Vitis · Taxon · picture of the genus (one of its species)Victor M. Vicente Selvas · Public domain · Wikimedia Commons ↗

Verbatim

e0

“T4 showed the lowest percentages of shot berries, accompanied by a significant increase in yield, cluster weight, berry weight, diameter, and total chlorophyll concentration in berry skin, while reducing total carotenoid concentration in berry skin”

✓ located verbatim in the source · abstract, characters 1332–1580 · show in text ↑
t0

“‘Early Sweet’ Grapevines”

✓ located verbatim in the source · title, characters 19–43 · show in text ↑

Gibberellic acid · quality: general · VitisResults differ

12 papers: 9 positive, 3 negative or no effect

8 papers in the same direction as this paper · 3 in the opposite direction

  1. no effect
  2. no effect
  3. no effect

8 papers more in this group

See all 12 papers →

Gibberellic acid · molecular: metabolites · VitisResults differ

30 papers: 23 positive, 7 negative or no effect

6 papers in the same direction as this paper · 23 in the opposite direction

  1. positive
  2. positive
  3. positive

26 papers more in this group

See all 30 papers →

Gibberellic acid · yield · VitisResults differ

47 papers: 39 positive, 8 negative or no effect

38 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. negative

43 papers more in this group

See all 47 papers →

nitrogen · yield · VitisResults differ

33 papers: 25 positive, 8 negative or no effect

24 papers in the same direction as this paper · 8 in the opposite direction

  1. no effect
  2. negative
  3. no effect

29 papers more in this group

See all 33 papers →

nitrogen · quality: general · VitisPositive and negative results

11 papers: 6 positive, 5 negative or no effect

5 papers in the same direction as this paper · 5 in the opposite direction

  1. no effect
  2. no effect
  3. no effect

7 papers more in this group

See all 11 papers →

nitrogen · molecular: metabolites · VitisPositive and negative results

20 papers: 16 positive, 4 negative or no effect

3 papers in the same direction as this paper · 16 in the opposite direction

  1. positive
  2. positive
  3. positive

16 papers more in this group

See all 20 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.