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Effects of a phospholipase D inhibitor on postharvest enzymatic browning and oxidative stress of litchi fruit

文献类型： 外文期刊

作者： Sun, Jian 2 ; You, Xiangrong 1 ; Li, Li 1 ; Peng, Hongxiang 3 ; Su, Weiqiang 4 ; Li, Changbao 1 ; He, Quanguang 1 ; Liao, 1 ;

作者机构： 1.Guangxi Acad Agr Sci, Inst Agrofood Sci & Technol, Nanning 530007, Peoples R China

2.Guangxi Crop Genet Improvement Lab, Nanning 530007, Peoples R China

3.Guangxi Acad Agr Sci, Inst Hort Res, Nanning 530007, Peoples R China

4.Guangxi Acad Agr Sci, Inst Hort Res,

关键词： Phospholipase D;Postharvest litchi;Inhibitor;Enzymatic browning;Oxidative stress

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：5.537； 五年影响因子：5.821 ）

ISSN： 0925-5214

年卷期： 2011 年 62 卷 3 期

页码：

收录情况： SCI

摘要： Membrane lipid degradation catalyzed by phospholipase D (PLD) results in postharvest browning and senescence of litchi fruit. The effects of n-butanol, a specific PLD inhibitor, on enzymatic browning and oxidative stress during storage of litchi fruit at room temperature were evaluated. n-Butanol-treated fruit had a lower browning index and disease index than untreated fruit. n-Butanol treatment also decreased PLD activity. As a result, the decompartmentalization of litchi polyphenoloxidase and substrates was reduced. The conversion of substrates (-)-epicatechin and procyanidin A(2) into quinones was slowed down and enzymatic browning of litchi pericarp tissues was lower after 6 d storage. Additionally, n-butanol-treated fruit possessed significantly lower malondialdehyde contents than untreated fruit after 4 d storage. Analysis of antioxidative enzyme activities showed that n-butanol treatment inhibited oxidative stress mainly by maintaining high catalase activity in litchi pericarp tissues. Consequently, senescence of litchi fruit during storage was moderated. (C) 2011 Elsevier B.V. All rights reserved.

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