FOOD SCIENCE

Previous Articles     Next Articles

Effect of Micro-Vacuum Conditions on Broccoli Chlorophyll Degradation and Endogenous Oxidation Resistance

WANG Li-jiao,MU Qi-yun,LI Wen-xiang,WANG Shi-kui,ZHANG Sheng-jie   

  1. Key Laboratory of Modern Agricultural Quality and Safety Engineering of Qingdao, School of Food Science and Engineering,Qingdao Agricultural University, Qingdao 266109, China
  • Online:2013-10-25 Published:2013-09-28

Abstract:

In order to explore the physiological mechanisms of micro-vacuum storage conditions for delaying chlorophyll
degradation, broccoli was stored at (3.0 ± 0.5) ℃ and vacuum pressure of 53.33 to 66.66 kPa. The changes of chlorophyll
degradation, endogenous antioxidant enzyme activity, free radicals and membrane lipid peroxidation as well as the
relationship between chlorophyll degration and these indicators were studied during the micro-vacuum storage. The results
showed that vacuum pressure could delay the degradation rate of chlorophyll, improve SOD, POD and CAT activities,
reduce the release rate of superoxide anion free radical and H2O2 as well as MDA content, and retard the increase of
membrane permeability significantly (P < 0.05) when compared with atmospheric storage at the same temperature. The
degradation rate of chlorophyll revealed a significantly negative correlation with SOD, POD and CAT activities, chlorophyll
content, superoxide anion free radical release rate, H2O2 and MDA contents, and cell membrane permeability.

Key words: micro-vacuum, broccoli, chlorophyll, degradation