Berry abscission is a serious problem in table grape during postharvest storage and transport, causing significant economic losses. To explore the mechanism of berry abscission, we compared the abscission-susceptible grape genotype ‘Hutai No. 8’ with the abscission-resistant grape genotype ‘Xiangfei’ during post-harvest storage. Compared with ‘Xiangfei’, in ‘Hutai No. 8’, the berry detachment force was lower and the berry abscission percentage was higher; the contents of auxin and gibberellin in the berries, rachis and abscission zone were lower, and the contents of abscisic acid and ethylene were higher. Compared with ‘Xiangfei’, ‘Hutai No. 8’ had higher activities cell wall-degrading enzymes in the abscission zone; lower contents of total pectin and intact pectin fractions, and higher contents of degraded pectin. The activities of antioxidant enzymes in the abscission zone were lower in ‘Hutai No. 8’ than in ‘Xiangfei’, resulting in higher contents of reactive oxygen species and malondialdehyde, and higher relative conductivity. The distribution of calcium in different fractions differed between the two varieties. Ultimately, these differences resulted in softer berries and higher berry weight loss percentage and decay percentage in ‘Hutai No. 8’ than in ‘Xiangfei’ during storage. These results shed light on the mechanism of grape berry abscission during storage.

浆果脱落是鲜食葡萄采后贮运过程中的严重问题，造成重大经济损失。为了探索浆果脱落的机制，我们在采后贮藏过程中比较了易脱落的葡萄基因型'沪台8号'和抗脱落的葡萄基因型'香飞'。与‘香飞’相比，‘沪太8号’的离果力较低，离果率较高；浆果、轴和离区的生长素和赤霉素含量较低，而脱落酸和乙烯的含量较高。与‘香飞’相比，‘沪太8号’离区细胞壁降解酶活性较高；总果胶和完整果胶组分含量较低，降解果胶含量较高。'沪太8号'脱落区抗氧化酶活性低于'香妃'，导致活性氧和丙二醛含量较高，相对电导率较高。两个品种之间不同部分的钙分布不同。最终，这些差异导致在贮藏过程中，'沪太 8 号'比'香妃'的浆果更柔软，浆果重量损失率和腐烂率更高。这些结果揭示了葡萄浆果在贮藏过程中脱落的机制。这些差异导致在贮藏过程中，'沪太8号'比'香妃'的浆果更柔软，浆果重量损失率和腐烂率更高。这些结果揭示了葡萄浆果在贮藏过程中脱落的机制。这些差异导致在贮藏过程中，'沪太8号'比'香妃'的浆果更柔软，浆果重量损失率和腐烂率更高。这些结果揭示了葡萄浆果在贮藏过程中脱落的机制。