Effect of methyl jasmonate on quality and antioxidant activity of postharvest loquat fruit
Effect of methyl jasmonate on quality and antioxidant activity of postharvest loquat fruit
复制标题
茉莉酸甲酯对采后枇杷果实品质及抗氧化活性的影响
DOI：
10.1002/jsfa.3691
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发表时间：
2009-09-01
影响因子：
4.1
通讯作者：
Rui, Huaijing
中科院分区：
文献类型：
--
作者：
Cao, Shifeng;Zheng, Yonghua;Rui, Huaijing
BACKGOUND: Loquat fruit is rich in natural antioxidants and has shown a remarkably high antioxidant activity. To search for an effective method for maintaining or even improving antioxidant activity during postharvest storage, we investigated the effect of 10 µmol L−1 methyl jasmonate (MeJA) treatment on levels of major individual sugars and organic acids, total phenolics, total carotenoids, total flavonoids and antioxidant activity in loquat fruit during storage at 1 °C for 35 days.
RESULTS: The MeJA-treated fruit exhibited significantly lower levels of respiration rate, ethylene production, phenylalanine ammonia-lyase and polyphenol oxidase activities, and higher levels of sugars, organic acids, total phenolics and total flavonoids than control fruit. Meanwhile, the treatment also maintained significantly higher antioxidant activity as measured by the scavenging capacity against 1,1-diphenyl-2-picrylhydrazyl (DPPH), superoxide and hydroxyl radicals, and by the reducing power test compared to the control. There was a significant positive linear relationship between total phenolic content and DPPH radical scavenging activity.
CONCLUSION: MeJA treatment can improve the quality and functional properties of harvested loquat fruit by maintaining a higher level of antioxidants and enhancing antioxidant activity. Copyright © 2009 Society of Chemical Industry
