Effects of 1-MCP on reactive oxygen species, polyphenol oxidase activity, and cellular ultra-structure of core tissue in 'Yali' pear (Pyrus bretschneideri Rehd.) during Storage

文献类型： 外文期刊

第一作者： Dong, Yu

作者： Dong, Yu;Liu, Liqin;Zhao, Zhe;Guan, Junfeng;Dong, Yu;Zhi, Huanhuan

作者机构：

关键词： antioxidants;cellular structure;core browning;1-methylcyclopropene;oxidative stress;Pyrus bretschneideri Rehd

期刊名称：HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY （ 影响因子：1.842； 五年影响因子：2.083 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： 1-methylcyclopropene (1-MCP) has been shown to delay fruit ripening and senescence during storage. In this study, we investigated the effects of 1.0 mu L center dot L-1 1-MCP on the biochemical changes and cellular ultra-structure of the core tissue in 'Yali' pear (Pyrus bretschneideri Rehd.) fruits stored at 25 +/- 2A degrees C. Our results showed that 1-MCP treatment significantly decreased the rates of respiration and ethylene production before their climacteric peaks, inhibited the development of core browning, lowered the chlorogenic acid content and polyphenol oxidase activity before the onset of core browning, and preserved high levels of superoxide dismutase activity, ascorbic acid, and glutathione contents. Furthermore, it suppressed the accumulation of hydrogen peroxide, superoxide anion, and malondialdehyde in the core tissue, maintained the integral structure of the cell membrane and organelle, and delayed the accumulation of electron-opaque matters in the vacuoles of core cells. These results suggested that 1-MCP treatment could reduce the injury caused by reactive oxygen, inhibit the oxidation of phenolics, and keep the cell membrane intact in core cells, thus, delaying the core browning in 'Yali' pear during storage.

分类号： S6

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