The quality traits of table grape most appreciated by the consumers are berry size, bunch architecture, and freshness appearance (especially after post-harvest cold storage). Loss of bunch freshness reduces the value and selling potential for the market. Application of plant growth regulators (PGRs) may improve quality, particularly in seedless cultivars that naturally set compact bunches with small berries. PGRs as auxins and gibberellins are involved in fruit set, growth, development and ripening processes, including vascular tissues differentiation. This study aimed to determine if the combination of auxin indole-3-butyric acid (IBA) and gibberellic acid (GA₃) improve quality attributes of 'Superior Seedless' bunches. Field grown vines were sprayed at full bloom, with 20 mg L⁻¹ IBA and 20 mg L⁻¹ IBA +10 mg L⁻¹ GA₃, to evaluate their effects on bunch quality at harvest and post-harvest (after 60 d of cold storage; 0 °C and 95 % RH). IBA + GA₃ treatment produced looser bunches with larger berries as compared to Control. Total vascular bundle area (xylem and phloem) and rachis hydraulic conductivity were increased by IBA + GA₃. As well, IBA + GA₃ improved rachis and berries firmness, also freshness appearance after 60 d cold storage. In conclusion, a single spray of IBA + GA₃ at full bloom improved quality and cold storage capacity of ‘Superior Seedless’ table grape, but it is not clear if GA₃ or the combination of IBA and GA₃ contributed to the observed effects.

消费者最喜欢的鲜食葡萄的品质特征是浆果大小，束状结构和新鲜外观（尤其是在收获后冷藏后）。束鲜度的损失降低了市场的价值和销售潜力。应用植物生长调节剂（PGR）可能会提高品质，特别是在无核栽培品种中，自然地将紧凑的束束与小浆果融合在一起。作为生长素和赤霉素的PGRs参与结实，生长，发育和成熟过程，包括血管组织分化。这项研究旨在确定生长素吲哚-3-丁酸（IBA）和赤霉素（GA ₃）的组合能否改善' Superiorlessless '的品质属性一束。田间生长的葡萄藤盛开时喷洒20 mg L ^-1 IBA和20 mg L ^-1 IBA +10 mg L ^-1 GA ₃，以评估其对收获和收获后（60天后）束质量的影响。冷藏； 0°C和95％RH）。与对照相比，IBA + GA ₃处理可产生带有较大浆果的较松束。IBA + GA ₃增加了总的血管束面积（木质部和韧皮部）和Rachis的水力传导性。同样，IBA + GA ₃改善了萝卜和浆果的硬度，冷藏60 d后也表现出新鲜感。总之，IBA + GA ₃的单次喷雾盛开时，“高级无核”食用葡萄的品质和冷藏能力得到改善，但尚不清楚GA ₃或IBA和GA ₃的组合是否对观察到的效果有所贡献。