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

ACTA HORTICULTURAE SINICA ›› 2006, Vol. 33 ›› Issue (3): 609-612.

• 研究简报 • Previous Articles Next Articles

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

Abstract

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

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

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