食品科学 ›› 2013, Vol. 34 ›› Issue (8): 313-316.doi: 10.7506/spkx1002-6630-201308067

• 包装贮运 • 上一篇    下一篇

外源甜菜碱处理对黄瓜冷藏期间活性氧代谢的影响

王富贵,韩 涛,张海英*,许 丽   

  1. 北京农学院食品科学与工程学院,北京 102206
  • 收稿日期:2012-02-24 修回日期:2013-03-17 出版日期:2013-04-25 发布日期:2013-05-07
  • 通讯作者: 张海英 E-mail:zhanghaiying8079@sina.com

Effect of Exogenous Glycine Betaine on Oxidative Metabolism in Cucumber during Low-Temperature Storage

WANG Fu-gui,HAN Tao,ZHANG Hai-ying*,XU Li   

  1. College of Food Science and Engineering, Beijing University of Agriculture, Beijing 102206, China
  • Received:2012-02-24 Revised:2013-03-17 Online:2013-04-25 Published:2013-05-07

摘要: 目的:研究不同浓度的外源甜菜碱(GB)处理对低温胁迫下黄瓜抗氧化作用的影响,探讨甜菜碱对黄瓜抗冷性作用的机理。方法:以“中农8号”黄瓜为试材,分别用浓度0、5、10、15mmol/L的甜菜碱浸泡黄瓜15min,置于4℃条件贮藏。结果:外源甜菜碱处理提高了黄瓜甜菜碱含量,降低果实中脂氧合酶(LOX)活性、增强过氧化物酶(POD)和过氧化氢酶(CAT)活性并有效清除过氧化氢(H2O2)、减少丙二醛(MDA)积累。结论:以10mmol/L甜菜碱处理黄瓜效果最为明显。

关键词: 黄瓜, 甜菜碱, 抗冷性, 氧化代谢

Abstract: The aim of this work was to investigate the effect and possible mechanism of glycine betaine (GB) treatment on the antioxidant properties of cucumber during low-temperature storage. ‘Zhongnong 8’ cucumbers were immersed in GB solutions at 0, 5, 10 mmol/L and 15 mmol/L and stored at 4 ℃. Changes in parameters related to oxidative metabolism were observed. The results showed that increasing GB concentration resulted in a decrease in lipoxygenase (LOX) activity. The activities of peroxidase (POD) and catalase (CAT) were enhanced by exogenous GB treatment. Meanwhile, the accumulation of malondialdehyde (MDA) and hydrogen peroxide (H2O2) were restrained. GB at a dose of 10 mmol/L revealed the most obvious effect.

Key words: cucumber, glycine betaine (GB), low-temperature resistance, oxidation metabolism