FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (10): 326-329.doi: 10.7506/spkx1002-6630-201010072

• Packaging & Storage • Previous Articles     Next Articles

Effect of 1-MCP Treatment on Reactive Oxygen Metabolism and Related Enzymes in Melon during Postharvest Storage

SUN Ai-ping1，ZHENG Yong-hua2，YANG Hai-yan1，LI Xue-wen1,2,*，HAN Wei1，ZHANG Xi-jun1   

  1. 1. College of Food Science, Xinjiang Agricultural University, Urumqi 830052, China；
    2. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2008-11-28 Revised:2010-02-25 Online:2010-05-15 Published:2010-12-29
  • Contact: LI Xue-wen E-mail:xjndsp@sina.com

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Abstract:

The fruits of Zaohuangmi melon, an early ripening melon cultivar, were treated with 1 μL/L 1-methylcyclopropene (1-MCP) for 24 h at ambient temperature (22－25 ℃) and then stored at 22 ℃. The activities of reactive oxygen species (ROS) metabolism related enzymes: SOD, POD, CAT and POD, superoxide anion radical production rate and the content of MDA in the treated melon fruits were measured periodically during 22 days of storage. The results showed that exposure of melon fruits to 1-CMP prevented the decline of CAT activity, caused the increase of SOD activity at the beginning of storage and significantly increased POD activity, reaching a peak value after 3 days. The POD activity of 1-CMP-treated melon fruits was higher than that of control fruits over the entire storage period. 1-CMP-treated melon fruits exhibited significantly lower superoxide anion radical production rate and lower MDA content and thus, the postharvest senescence of melon fruits was postponed.

Key words: 1-methylcyclopropene (1-MCP), melon fruit, reactive oxygen species (ROS) metabolism

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