| 方 方 1,2，马娜璇 1,2，张雪莲 2,3，庞学群 2,3，张昭其1,2.聚丙烯酰胺树脂处理对荔枝低温贮藏期间果皮褐变和病害的影响[J].广东农业科学,2020,47(7):148-154 |
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聚丙烯酰胺树脂处理对荔枝低温贮藏期间果皮褐变和病害的影响 |
| Effects of Polyacrylamide Resin on Pericarp Browning and Diseases of Litchi Fruits During Low Temperature Storage |
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| DOI：10.16768/j.issn.1004-874X.2020.07.019 |
| 中文关键词: 荔枝果实 贮藏 聚丙烯酰胺 果皮褐变 果实腐烂 |
| 英文关键词: litchi fruit storage polyacrylamide（PAM） pericarp browning fruit decay |
| 基金项目:广东省自然科学基金（2018B030311057）；国家自然科学基金（31772036）；国家荔枝龙眼产业技术体系（CARS-32-15） |
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| 中文摘要: |
| 【目的】探讨荔枝低温自发气调贮藏过程中保鲜袋内的湿度对果皮褐变及果实病害发展的影响。【方法】以怀枝为材料，以聚丙烯酰胺（PAM）树脂作为湿度调控剂，在聚乙烯薄膜包装中添加 PAM（10 g PAM /kg 荔枝果实），研究荔枝贮藏过程中的病情指数、腐烂率及其他生理生化指标变化。【结果】与对照相比，在聚乙烯薄膜袋中添加 PAM 进行湿度调控，能有效降低荔枝 5 ℃贮藏期间包袋内的相对湿度，波动范围为 80%~90%。贮藏 28 d 后，对照果实腐烂率和病情指数分别为 31%、2%，而 PAM 处理的仅为 11% 和 1.2%，PAM 显著抑制了病害发展；PAM 处理果实的褐变指数和失重率略高于对照，果实含水量和果皮花色素苷含量比对照略低。【结论】PAM 处理能有效降低荔枝低温自发气调贮藏过程中的病情指数和腐烂率，对果皮褐变影响不明显。筛选出合适剂量的 PAM 结合特定厚度的保鲜薄膜包装，以期解决荔枝贮运保鲜过程中果实腐烂与果皮褐变这一矛盾。 |
| 英文摘要: |
| 【Objective】The purpose of this study was to investigate the effect of humidity control on pericarp browning and fruit disease development during low-temperature storage with modified-atmosphere packaging of litchi.【Method】With polyacrylamide（PAM）resin as a humidity regulator, PAM（10 g PAM for 1 kg litchi fruit）was added in polyethylene（PE）film packaging bag with Huaizhi fruit, and the disease index, decay rate and other physiological and biochemical changes of litchi during storage were studied.【Result】Compared with the control treatment, the application of PAM resin in PE film packaging bag could effectively reduce the relative humidity in the litchi package during storage at 5℃ , with the fluctuation range of 80%-90%. After 28 days of storage, the decay rate and the disease index of the control fruits were 31% and 2%, respectively while those of the litchi treated with PAM were 11% and 1.2%. PAM treatment inhibited the development of diseases significantly.However, The pericarp browning and loss of fresh weight of fruits treated with PAM were slightly higher than those of the control, while the water content in fruit and anthocyanin content in the pericarp were slightly lower than those of control.【Conclusion】PAM treatment significantly inhibited the disease index and fruit decay during lowtemperature storage with modified-atmosphere packaging, and had little effect on pericarp browning. Application of appropriate amount of humidity regulator and combining with the appropriate thickness film could be a promising strategy to solve the contradiction between fruit decay and pericarp browning during postharvest storage and transportation of litchi fruits. |
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