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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (12): 3322-3334.doi: 10.16420/j.issn.0513-353x.2024-1051

• Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Impact of GA3-CPPU Combined Fruit Retention Treatments on Berry Quality in Protected Cultivation of‘Wuhe Cuibao’Grape

HAN Shou’an, WANG Min, XIE Hui, ZHU Xuehui, WANG Yanmeng, LIU Xupeng, ZHANG Wen*()   

  1. Institute of Fruit and Vegetable,Xinjiang Academy of Agricultural Sciences/Scientific Observing and Experimental Station of Pomology(Xinjiang),Ministry of Agriculture and Rural Affairs/Xinjiang Crop Chemical Regulation Engineering Technology Research Center/Key Laboratory of Horticulture Crop Genomics Research and Genetic Improvement in Xinjiang,Urumqi 830091,China
  • Received:2025-08-05 Revised:2025-11-01 Online:2025-12-25 Published:2025-12-20
  • Contact: ZHANG Wen

Abstract:

To advance cultivation techniques and facilitate regional adoption of‘Wuhe Cuibao’(Vitis vinifera L.),an elite early-maturing seedless grape cultivar in Xinjiang,investigated three plant growth regulator combinations(GA3 + CPPU)applied two days post-anthesis under protected cultivation:T1(5 mg · L-1 + 0.5 mg · L-1),T2(10 mg · L-1 + 0.5 mg · L-1),and T3(15 mg · L-1 + 0.5 mg · L-1),with water-treated vines as the control. Systematic analysis demonstrated that all treatments significantly enhanced berry weight(23.33%,28.72%,and 32.05% increases over the control for T1-T3,respectively),cluster weight,and visual quality. While treatments maintained soluble solids content(TSS)> 19°Brix,they exhibited reduced TSS/titratable acidity ratios(19.24%,19.12%,and 22.50% decreases vs. the control)without detectable sensory impairment. Volatile profiling revealed:significant increases in most terpene-derived aroma compounds,elevated relative odor activity values(rOAV)of rose-type aromas(nerol,geraniol),and reduced damascenone rOAV. Sensory evaluation showed T1 and T2 significantly increased peel tannins without altering astringency scores,while all treatments reduced flesh texture refinement but improved appearance ratings. Comparative analysis identified T2(10 mg · L-1 GA3 + 0.5 mg · L-1 CPPU)as optimal,achieving balanced berry enlargement,TSS preservation(> 19°Brix),enhanced rose-type aroma profile,and superior pedicel tensile strength combined with optimal fruit firmness. These results validate T2 as the standardized fruit retention protocol for protected cultivation of ‘Wuhe Cuibao’in Xinjiang.

Key words: grape, plant-growth regulator, fruit retention, quality, aroma