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低温贮藏荔枝在梯度回温后的货架期品质变化
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吴丹,(2000-),女,硕士研究生,研究方向:农产品保鲜,E-mail:wudan123youxiang@163.com 通讯作者:徐玉娟,(1974-),女,博士,研究员,研究方向:农产品保鲜与加工,E-mail:xyj6510@126.com

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广东省科技计划项目(2024B0202010007);广东省区域创新能力与支撑保障体系建设专项(2023B0202090004);广州市重点研发计划项目(2023B01J2001)


Quality Changes Within Shelf Life of the Litchi during Gradient Rewarming after Low-temperature Storage
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    摘要:

    为研究梯度回温对低温贮藏荔枝货架期品质保持的作用,以“八月红”荔枝为实验材料,经过1 d 1 ℃冷库贮藏后,依次经过9、18和25 ℃三个温度环境后逐渐回到室温(25 ℃),设为“梯度回温”处理组,同时设置1 d 1 ℃冷库贮藏后直接放入25 ℃环境恢复室温(25 ℃)的荔枝为“直接回温”处理组作为对照,分别模拟货架在常温放置0、1、3、5 d,并对货架期荔枝果实各项指标进行测定。结果表明,“梯度回温”处理能够缓解荔枝褐变,回温处理后在常温放置5 d时,“直接回温”荔枝的褐变指数为1.50,“梯度回温”荔枝的褐变指数仅为1.00。此外检测发现“梯度回温”延缓了可溶性固形物、可滴定酸、总酚、类黄酮、花青素含量的减少,并有效抑制了果皮中多酚氧化酶和过氧化物酶活性的增加。因此,采用梯度回温方式处理能有效缓解低温贮藏荔枝品质劣变,延长货架保鲜期,具有广阔的应用前景。

    Abstract:

    In order to investigate the impact of gradient warming on the quality preservation of the litchi stored at low temperature during shelf life, "August Red" litchi was selected as the experimental material. After 1 day of storage at 1 ℃, the litchi fruits were gradually brought back to room temperature (25 ℃) in three different temperature environments: 9, 18, and 25 ℃ , which was set as the "gradient rewarming" treatment group. Meanwhile, another group of litchi fruits stored at 1 ℃ for 1 d were directly placed in a room temperature environment (25 ℃) to restore to room temperature, which was set as the “direct rewarming” group as the control, to simulate the shelves placed under room temperature conditions for 0, 1, 3, and 5 d, respectively, and various indicators related to litchi fruit quality during the shelf life were measured. The results demonstrated that the "gradient rewarming" treatment effectively mitigated browning of litchi fruits. After the "gradient rewarming" treatment followed by standing at room temperature for five days, the browning coefficient of the “direct rewarming” litchi was 1.50, whilst the browning coefficient of the "gradient rewarming" litchi was only 1.00. In addition, "gradient rewarming" was found to delay the decreases in soluble solids content, titratable acids content, total phenols content, flavonoids content, and anthocyanins content, while also inhibiting effectively the increases in the activities of polyphenol oxidase and peroxidase in the peels. Therefore, the use of gradient rewarming treatment can effectively alleviate the quality deterioration of litchi stored at low temperature, extend litchi’s shelf life, indicating broad application prospects.

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吴丹,戴凡炜,刘湘玲,陈敏慧,陈飞平,戚英伟,陈于陇,叶明强,王玲,罗政,徐玉娟.低温贮藏荔枝在梯度回温后的货架期品质变化[J].现代食品科技,2025,41(7):160-167.

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  • 收稿日期:2024-04-11
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  • 在线发布日期: 2025-09-30
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