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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (5): 294-298.

所属专题： 园艺

• 农学 农业基础科学 • 上一篇    下一篇

壳聚糖涂膜对常温保鲜番木瓜膜脂过氧化的影响

李茂富,李绍鹏   

  • 收稿日期:2009-10-09 修回日期:2009-10-31 出版日期:2010-03-05 发布日期:2010-03-05
  • 基金资助:

    2007海南大学校科技基金项目;海南省重点学科建设项目“热带园艺教育部重点实验室及重点学科建设”

Effect of Chitosan on the Membrane Lipids Peroxidation of Papaya Fruits

  • Received:2009-10-09 Revised:2009-10-31 Online:2010-03-05 Published:2010-03-05

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摘要：

以马来6号番木瓜果实为试材，用不同浓度壳聚糖(CTS)涂膜处理后放入人工气候箱中于25±2℃下贮藏，研究了壳聚糖对常温保鲜番木瓜膜脂过氧化的影响。结果表明，一定浓度的壳聚糖处理可显著降低膜脂过氧化过程中脂氧合酶（LOX）活性的增长，减缓超氧阴离子（O2-）的产生速率，提高超氧化物歧化酶（SOD）和超氧化物酶（POD）等膜保护酶的活性，减少了膜脂过氧化物产物丙二醛（MDA）的积累，从而有利于果实硬度的维持。结论：壳聚糖可减轻膜脂过氧化程度，延缓番木瓜果实的后熟，以1.25%处理浓度最好。

关键词: 多功能保水剂, 多功能保水剂, 条施, 拌种, 撒施, 产量

Abstract:

In this experiment, the effect of chitosan(CTS) on the membrane lipids peroxidation of papaya fruits(CV. Malaya 6﹟) was studied, which were stored in artificial bioclimatic chamber under room temperature 25±2℃ after dip coating with different contents of CTS. The results indicated that proper content of CTS could reduce the activity growth of Lipoxygenase(LOX), slow down the production rate of superoxide anion(O2-), enhance the activity of Superoxide Dismutase(SOD) and Peroxydase(POD), decrease the content of malonaldehyde(MDA), thus keep higher firmness of papaya fruits during the storage. So it can be drawn a conclusion that CTS has effect on alleviating the peroxidation degree of membrane lipids, defering the store maturity time of papaya fruit. The best content of CTS is 1.25%.