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2025 Vol.38, Issue 2 Preview Page

Research Article

Fruit Characteristics of ’Stella’ Grape (Vitis vinifera L.) in Response to Plant Growth Regulator Treatments for Seedlessness and Berry Enlargement

무핵화와 과립 비대를 위한 생장조절제 처리에 따른 ‘Stella’ 포도(Vitis vinifera L.)의 과실 특성

Su Jin Kim1
,
Dong Hoon Lee2
,
Dong Jun Im3
,
Jeong-Sil Choi3
,
Youn Young Hur4
,
Seo Jun Park5
김 수진1
,
이 동훈2
,
임 동준3
,
최 정실3
,
허 윤영4
,
박 서준5
1Researcher, Research Institute of Climate Change and Agriculture, National Institute of Horticultural & Herbal Science, Jeju 63240, Korea
2Senior Researcher, Citrus Research Center, National Institute of Horticultural & Herbal Science, Seogwipo 63607, Korea
3Researcher, Fruit Research Division, National Institute of Horticultural & Herbal Science, Wanju 55365, Korea
4Senior Researcher, Fruit Research Division, National Institute of Horticultural & Herbal Science, Wanju 55365, Korea
5Senior Researcher, Technology Service Division, National Institute of Horticultural & Herbal Science, Wanju 55365, Korea
1국립원예특작과학원 온난화대응농업연구소, 연구원
2국립원예특작과학원 감귤연구센터, 연구관
3국립원예특작과학원 과수과, 연구원
4국립원예특작과학원 과수과, 연구관
5국립원예특작과학원 기술지원과, 연구관
*Corresponding Author
1 April 2025. pp. 178-186
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Abstract

This study investigated the effects of plant growth regulators (PGRs) on seedlessness and fruit quality of the ‘Stella’ grape. PGR treatments included 200 ㎎/L Streptomycin (SM) and various concentrations of thidiazuron (TDZ) (1, 3, and 5 ㎎/L) combined with 25 ㎎/L gibberellic acid (GA). The results indicated that the grape bunch weight ranged from 300 g to 400 g across all treatments. Notably, the control and the treatment with 5 ㎎/L TDZ showed similar bunch weights, while other treatments resulted in lighter bunches. The berry weight did not significantly increase in most PGR treatments, except for the 5 ㎎/L TDZ treatment. The fruit length to diameter (L/D) ratio decreased in all PGR-treated grapes, resulting in a deviation from the typical rugby ball shape. Soluble solid content (SSC) was consistently above 20% in all groups, with no significant differences in acidity or color among the treatments. Notably, all PGR treatments achieved 100% seedlessness, compared to a 72% seedlessness rate in the control. Berry skin thickness and polymeric tannin content increased with higher TDZ concentrations, particularly in SM-treated groups. These findings suggest that PGR treatments effectively induce seedlessness in ‘Stella’ grapes, though optimization is required to enhance berry size and other quality traits.

Keywords
Fruit characteristic
Grape
Plant growth regulator
Seedlessness
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Information
  • Publisher :The Plant Resources Society of Korea
  • Publisher(Ko) :한국자원식물학회
  • Journal Title :Korean Journal of Plant Resources
  • Journal Title(Ko) :한국자원식물학회지
  • Volume : 38
  • No :2
  • Pages :178-186
  • Received Date : 2024-12-24
  • Revised Date : 2025-03-26
  • Accepted Date : 2025-03-27
  • DOI :https://doi.org/10.7732/kjpr.2025.38.2.178
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