食品科学 ›› 2007, Vol. 28 ›› Issue (5): 339-343.

• 包装贮运 • 上一篇    下一篇

低温对白兰瓜果实膜脂过氧化和渗透调节物质的影响

 刘芳, 陈年来, 李仲芳, 李喜娥   

  1. 乐山师范学院化学与生命科学系; 甘肃农业大学农学院; 甘肃农业大学农学院 四川乐山614004甘肃农业大学农学院; 甘肃兰州730070; 四川乐山614004;
  • 出版日期:2007-05-15 发布日期:2011-12-31

Effects of Chilling Injury to Honey Dew Fruits on Membrane Lipid Peroxidation and Osmotic Constituents Adjustment

 LIU  Fang, CHEN  Nian-Lai, LI  Zhong-Fang, LI  Xi-E   

  1. 1.Department of Chemistry and Life Sciences,Leshan Normal College,Leshan 614004,China; 2.College of Agriculture,Gansu Agricultural University,Lanzhou 730070,China
  • Online:2007-05-15 Published:2011-12-31

摘要: 研究了白兰瓜果实在冷害温度(2、4、7℃)和非冷害温度(9℃)下膜脂过氧化作用和膜保护酶的活性及渗透调节物质脯氨酸、可溶性蛋白、可溶性糖含量的变化。试验结果表明,SOD的活性随温度的降低逐渐降低,冷害温度下POD活性在7d时出现峰值。21d时冷害温度下MDA含量迅速增加,并且差异显著高于非冷害温度下的果实。冷害温度下脯氨酸含量先升后降。在28d,冷害温度下的可溶性蛋白质含量显著高于非冷害温度下的。不同的低温贮藏没有改变白兰瓜果实的可溶性糖含量的变化趋势,只是含量的多少有所不同,除21d外,各处理均为贮藏温度越低,果实可溶性糖含量越高,且在贮藏期末差异极显著(p<0.01)。

关键词: 甜瓜, 保护酶, 冷害, MDA, 渗透调节物质

Abstract: Membrane lipid peroxidation,activity of SOD and POD,proline,soluble protein and soluble sugar chilling injuries of Honey Dew fruits at temperatures(2℃,4℃,7℃)and un-chilling injury temperature(9℃)respectively were studied.The results showed that with the decrease of temperature,the activity of SOD and POD decreases .But under chilling injury temperature POD activity appears the peak value in 7day and MDA increases sharply in 21day,and Pro content becomes higher at the beginning of stressing but lower later on.The ehiiling injury temperature has the same effect on soluble protein and soluble sugar:the lower the temperature,the higher the contents of them.

Key words: Cucumis melo L, protective enzyme, chilling injury, MDA, osmotic adjustment