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GA(3) Treatment Delays the Deterioration of 'Shixia' Longan during the On-Tree Preservation and Room-Temperature Storage and Up-Regulates Antioxidants

文献类型： 外文期刊

作者： Luo, Tao 1 ; Lin, Xiaolan 1 ; Lai, Tingting 1 ; Long, Libing 1 ; Lai, Ziying 1 ; Du, Xinxin 1 ; Guo, Xiaomeng 1 ; Shuai, Liang 4 ; Han, Dongmei 5 ; Wu, Zhenxian 1 ;

作者机构： 1.South China Agr Univ, Coll Hort, Guangzhou 510642, Peoples R China

2.Minist Educ, Engn Res Ctr Southern Hort Prod Preservat, Guangdong Prov Key Lab Postharvest Sci Fruits & Ve, Guangzhou 510642, Peoples R China

3.South China Agr Univ, Coll Hort, Key Lab Biol & Genet Improvement Hort Crops South, Minist Agr & Rural Affairs, Guangzhou 510642, Peoples R China

4.Nanchang Normal Univ, Coll Chem & Food Sci, Nanchang 330032, Peoples R China

5.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Key Lab South Subtrop Fruit Biol & Genet Resource, Minist Agr, Guangzhou 510640, Peoples R China

关键词： longan (Dimocarpus longan Lour.) fruit; preharvest GA(3) treatment; antioxidants; total flavonoid content; total phenolic content; storability

期刊名称：FOODS （ 影响因子：5.2； 五年影响因子：5.5 ）

ISSN：

年卷期： 2023 年 12 卷 10 期

页码：

收录情况： SCI

摘要： Gibberellic acids had been proven to improve the fruit quality and storability by delaying deterioration and maintaining the antioxidant system. In this study, the effect of GA(3) spraying at different concentrations (10, 20, and 50 mg L-1) on the quality of on-tree preserved 'Shixia' longan was examined. Only 50 mg L-1 GA(3) significantly delayed the decline of soluble solids (22.0% higher than the control) and resulted in higher total phenolics content (TPC), total flavonoid content (TFC), and phenylalanine ammonia-lyase activity in pulp at the later stages. The widely targeted metabolome analysis showed that the treatment reprogrammed secondary metabolites and up-regulated many tannins, phenolic acids, and lignans during the on-tree preservation. More importantly, the preharvest 50 mg L-1 GA(3) spraying (at 85 and 95 days after flowering) led to significantly delayed pericarp browning and aril breakdown, as well as lower pericarp relative conductivity and mass loss at the later stages of room-temperature storage. The treatment also resulted in higher antioxidants in pulp (vitamin C, phenolics, and reduced glutathione) and pericarp (vitamin C, flavonoids, and phenolics). Therefore, preharvest 50 mg L-1 GA(3) spraying is an effective method for maintaining the quality and up-regulating antioxidants of longan fruit during both on-tree preservation and room-temperature storage.

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