臭氧处理对红灯樱桃保鲜效果的影响
Effects of ozone treatment on the preservation of Hongdeng cherries
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摘要: 以市售红灯樱桃(九成熟)为研究对象,经低、中、高3种质量浓度臭氧处理后,分析其低温贮藏期间各理化指标和超微结构变化情况,探究臭氧处理对红灯樱桃保鲜效果的影响。结果表明:不同质量浓度臭氧处理均能有效改善红灯樱桃的贮藏品质,延缓红灯樱桃贮藏期间腐烂率的上升,降低细胞膜脂过氧化产物丙二醛(MDA)的累积,减缓硬度下降,提高花青素含量和抗氧化酶活性。与对照组相比,贮藏末期中等质量浓度(6.39 mg/m3)臭氧处理后的红灯樱桃腐烂率降低了76.19 %,硬度提高了36.46 %,色差(ΔE)和MDA含量维持在69.45和6.83 μmol/g,花青素含量增加至0.581 ΔOD/g,超氧化物歧化酶(SOD)活性提高至69.31 U/g;同时,可诱导红灯樱桃果皮气孔缩小,有效控制果实水分流失,并通过延缓细胞壁降解,维持细胞组织结构,达到提高红灯樱桃贮藏品质、延长市场供应期的目的。Abstract: Commercially available Hongdeng cherries (nine-tenths ripe) were used as the research object. After ozone treatment at low, medium and high concentrations, changes in physicochemical indexes and ultrastructures during low-temperature storage were analyzed to investigate the effects of ozone treatment on the preservation efficacy of Hongdeng cherries. Results showed that ozone treatment at all concentrations improved storage quality by delaying the increase in decay rate, reducing the accumulation of malondialdehyde (MDA, a lipid peroxidation product), retarding the loss of firmness, and enhancing anthocyanin content and antioxidant enzyme activities during storage. Specifically, compared to the control group, medium-concentration ozone treatment (6.39 mg/m3) at the end of storage reduced decay rate by 76.19%, elevated firmness by 36.46%, maintained ΔE and MDA content at 69.45 and 6.83 μmol/g, increased anthocyanin content to 0.581 ΔOD/g, and enhanced superoxide dismutase (SOD) activity to 69.31 U/g. Additionally, ozone treatment induced stomatal narrowing in the cherry pericarp, effectively controlled water loss, and preserved cellular integrity by delaying cell wall degradation, thereby improving storage quality and extending market availability of Hongdeng cherries.
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Key words:
- Hongdeng cherry /
- ozone treatment /
- low-temperature storage /
- preservation efficacy
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