高氧处理对冬枣货架期间膜脂过氧化和保护酶活性的影响

园艺学报 ›› 2006, Vol. 33 ›› Issue (3): 609-612.

高氧处理对冬枣货架期间膜脂过氧化和保护酶活性的影响

王贵禧¹;李鹏霞^{1, 2};梁丽松¹;樊金拴²

(¹中国林业科学研究院林业研究所, 国家林业局林木培育重点实验室, 北京100091; ²西北农林科技大学林学院,陕西杨凌712100)

收稿日期:2005-06-06 修回日期:2005-09-25 出版日期:2006-06-25 发布日期:2006-06-25

Effect of Postharvest High-oxygen Treatments on ‘Dongzao’Jujube Membrane Lipids Peroxidation and Defensive Enzyme Activities during Shelf-life

Wang Guixi¹; Li Pengxia^{1, 2};Liang Lisong¹;Fan Jinshuan²

(¹Institute of Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China; ² College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China)

Received:2005-06-06 Revised:2005-09-25 Online:2006-06-25 Published:2006-06-25

摘要/Abstract

摘要： 研究了在- 1～ - 2℃条件下冬枣果实经流动的21% O₂(空气对照) 、70% O₂ ( 30%N₂ ) 、100% O₂ 分别处理7 d和15 d, 在20℃货架期期间测定果实相对电导率、丙二醛(MDA) 含量以及保护酶系( SOD、CAT、POD) 活性的变化。结果表明, 高O₂处理可抑制冬枣货架期相对电导率的升高, 100%O₂ 处理效果好于70% O₂ 处理。70% O₂处理7 d对冬枣货架期期间的膜脂过氧化作用没有显著影响, 但诱导了SOD、CAT和POD活性的升高, 促进冬枣果实在货架期衰老。100% O₂ 处理能抑制冬枣果实货架期膜脂过氧化作用, 在货架期期间保持较稳定的SOD和CAT活性, 但对POD 活性的升高有促进作用。总体来看, 100% O₂ 处理15 d对减缓冬枣货架期的衰老代谢有较好效果。

关键词: 冬枣, 高氧处理, 货架期, 膜脂过氧化, 保护性酶

Abstract: The effects of postharvest high-oxygen treatments on relative electric conductivity, malondialdehyde (MDA) content, and activities of defensive enzymes ( SOD, CAT, POD) in ‘Dongzao’ jujube( Zizyphus Jujuba Mill. ) fruit were investigated during shelf-life. ‘Dongzao’ jujube fruitwere p laced in jars and ventilated continuously with air (21% O₂ ) , 70% O₂ + 30%N₂ or 100% O₂ at - 1 to - 2℃ for 7 or 15 days, and then placed at 20℃ for the test of shelf-life. The results showed that high-oxygen treatments could inhibit the increase of relative electric conductivity and the treatment with 100% O₂ was more effective than that of 70% O₂. 70% O₂ treatment for 7 d had not positive effects on reducing the MDA contents, but induced the high levels of SOD, CAT and POD activities. The result indicated that 70% O₂ postharvest treatment fastened the senescence of jujube fruits during shelf-life. Treatment with 100% O₂ for 15 d was the most effective in keeping membrane permeability and maintaining the activities of defensive enzyme during shelf-life.

Key words: Jujube, High-oxygen treatment, Shelf-life, Membrane lipid peroxidation, Defensive enzymes

王贵禧;李鹏霞;;梁丽松;樊金拴. 高氧处理对冬枣货架期间膜脂过氧化和保护酶活性的影响[J]. 园艺学报, 2006, 33(3): 609-612.

Wang Guixi;Li Pengxia;;Liang Lisong;Fan Jinshuan. Effect of Postharvest High-oxygen Treatments on ‘Dongzao’Jujube Membrane Lipids Peroxidation and Defensive Enzyme Activities during Shelf-life[J]. ACTA HORTICULTURAE SINICA, 2006, 33(3): 609-612.

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