短波紫外线照射对‘金都’火龙果采后保鲜的影响

doi:10.3969/j.issn.1009-7791.2021.05.004

亚热带植物科学 ›› 2021, Vol. 50 ›› Issue (05): 353-359.DOI: 10.3969/j.issn.1009-7791.2021.05.004

短波紫外线照射对‘金都’火龙果采后保鲜的影响

罗恩锡1，李真琴1，洪克前2，宋康华2，梁永康1，王俊宁1*

(1. 广东海洋大学滨海农业学院，广东湛江 524088；2. 中国热带农业科学院南亚热带作物研究所海南省热带园艺产品采后生理与保鲜重点实验室，广东湛江 524091)

收稿日期:2021-10-02 修回日期:2021-10-21 出版日期:2021-10-30 发布日期:2021-10-30
通讯作者: 王俊宁
基金资助:
广东海洋大学大学生创新训练项目(CQ201810566077)；国家级农科教合作人才培养基地资助项目(GDOU2013040301)；园艺和园林专业实践技能型农林人才培养模式改革试点资助项目(GDOU2014041208)；教育部卓越农林人才培养计划资助项目(园艺，GDOU2014041204)；园艺专业综合改革试点资助项目(GDOU2013040402)

Effect of UV-C Irradiation on Preservation of Hylocereus polyrhizus ‘Jindu’ Fruits

LUO En-xi1, LI Zhen-qin1, HONG Ke-qian2, SONG Kang-hua2, LIANG Yong-kang1, WANG Jun-ning1*

(1. College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang 524088, Guangdong China; 2. Hainan Province Key Laboratory for Postharvest Physiology and Technology of Tropical Horticultural Products, South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524091, Guangdong China)

Received:2021-10-02 Revised:2021-10-21 Online:2021-10-30 Published:2021-10-30
Contact: WANG Jun-ning

摘要/Abstract

摘要： 以‘金都’火龙果(Hylocereus polyrhizus ‘Jindu’)果实为试材，采用波长254 nm紫外杀菌灯为辐射源，给予不同剂量短波紫外线(Ultraviolet-C，UV-C)照射处理，探讨低剂量UV-C对火龙果采后保鲜的影响及作用机理。结果表明，不同剂量UV-C照射处理能有效抑制‘金都’火龙果果实腐烂和电导率上升，降低果实TSS含量，其中1.0 kJ·m–2紫外线辐照效果最好。1.0 kJ·m–2 UV-C处理能极显著提高贮藏期火龙果的SOD和CAT活性，显著提高贮藏早中期的几丁质酶活性和PPO活性，β-1,3葡聚糖酶活性在贮藏后期也显著高于对照，但降低了火龙果贮藏中期(第6天)的POD活性。此外，1.0 kJ·m–2 UV-C处理显著提高火龙果贮藏期H2O2含量(除第6天外)，对果实的失水率无影响。采后火龙果应用适当剂量UV-C照射可提高抗病性，延长贮藏保鲜期。

关键词: 火龙果, 短波紫外线, 腐烂, 防御酶活性, 保鲜

Abstract: Influences of low dose short wave ultraviolet (UV-C) on the preservation of dragon fruit and its action mechanisms were studied for providing scientific basis of UV-C application in dragon fruit storage. The test material was ‘Jindu’ dragon fruit and common ultraviolet germicidal lamp with wavelength of 254 nm was used as the radiation source. The dragon fruits were irradiated with the radiation dose of 0, 1.0, 2.0, 3.0, 1.0 kJ·m–2, respectively. Then we conducted the experiment that the optimal dose of UV-C was selected by measuring the decay rate, electrical conductivity and TSS content of the dragon fruit. Dragon fruits treated with optimal dose of UV-C were stored under the condition of 22±1 ℃. Water loss rate, H2O2 content and defensive enzyme activity were measured periodically during storage. Different doses of UV-C treatment effectively inhibited the rot of dragon fruit and the increase in electrical conductivity, and reduced the TSS content in dragon fruit. 1.0 kJ·m–2 UV-C treatment had the best effect with significantly increasing of SOD and CAT activities in dragon fruit during the whole storage period, and significantly improving to chitinase and PPO activities in the early and middle storage period. The β-1,3-glucanase activity in the late storage period was also significantly higher than that of the control. But it reduced the POD activity in the middle storage period (the 6th day). In addition, 1.0 kJ·m–2 UV-C also significantly increased the H2O2 content during storage (except for the 6th day), and had no effect on the water loss rate of the fruit.

Key words: Hylocereus polyrhizusd, short-wave ultraviolet (UV-C), decay, defense enzyme activity, preservation

中图分类号:

S667

罗恩锡，李真琴，洪克前，宋康华，梁永康，王俊宁. 短波紫外线照射对‘金都’火龙果采后保鲜的影响[J]. 亚热带植物科学, 2021, 50(05): 353-359.

LUO En-xi, LI Zhen-qin, HONG Ke-qian, SONG Kang-hua, LIANG Yong-kang, WANG Jun-ning. Effect of UV-C Irradiation on Preservation of Hylocereus polyrhizus ‘Jindu’ Fruits[J]. Subtropical Plant Science, 2021, 50(05): 353-359.

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短波紫外线照射对‘金都’火龙果采后保鲜的影响

Effect of UV-C Irradiation on Preservation of Hylocereus polyrhizus ‘Jindu’ Fruits

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