食品科学

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外源L-Arg处理对蜜橘果实贮藏品质的影响

李芋萱1,曾凯芳1,2,邓丽莉1,2,*   

  1. 1.西南大学食品科学学院,重庆 400715;2.重庆市特色食品工程技术研究中心,重庆 400715
  • 出版日期:2015-12-25 发布日期:2015-12-24
  • 通讯作者: 邓丽莉
  • 基金资助:

    中央高校基本科研业务费专项(一般项目)(XDJK2014C068);“十二五”国家科技支撑计划项目(2015BAD16B07);
    国家自然科学基金青年科学基金项目(31401540)

Effect of Exogenous L-Arginine Treatment on Storage Quality of Mandarin Orange

LI Yuxuan1, ZENG Kaifang1,2, DENG Lili1,2,*   

  1. 1. College of Food Science, Southwest University, Chongqing 400715, China;
    2. Chongqing Engineering Research Center of Regional Food, Chongqing 400715, China
  • Online:2015-12-25 Published:2015-12-24
  • Contact: DENG Lili

摘要:

用100、200 μmol/L外源L-精氨酸(L-arginine,L-Arg)溶液浸泡处理蜜橘果实10 min,探讨该处理对采后蜜橘果实贮藏品质的影响。结果表明,适宜浓度(200 μmol/L)的外源L-Arg处理可以有效抑制蜜橘果实黄化,在一定程度上抑制果皮细胞膜透性的增加;在贮藏的前28 d内,L-Arg浸泡处理能够维持果实可溶性固形物的含量;各处理组之间的呼吸速率没有显著性差异,适宜浓度(200 μmol/L L-Arg)的L-Arg浸泡处理能够在一定程度上抑制蜜橘果实质量损失率的增加;延缓果实总酚、抗坏血酸含量的减少,贮藏前期(0~21 d)处理组果实果肉类黄酮含量与对照组之间无显著差异,贮藏后期(28~35 d)处理组果实类黄酮含量显著低于对照组果实。即200 μmol/L外源L-Arg处理能够在一定程度上有效延缓采后蜜橘果实的衰老和品质下降。

关键词: 外源L-Arg, 蜜橘, 色泽, 贮藏特性

Abstract:

In order to investigate the effect of exogenous L-arginine on the storage quality of mandarin orange (Citrus
reticulata Blanco), mandarin fruits were soaked in L-Arg solutions at 100 μmol/L and 200 μmol/L for 10 min, respectively
and then stored at 20 ℃ with 85%–90% relative humidity. The results showed that at optimal concentration (200 μmol/L),
exogenous L-Arg effectively inhibited the yellowing of mandarin fruits and the increase of the peel cell membrane
permeability to a certain extent. L-Arg treatments maintained the content of soluble solids in fruits during the first 28 days
of storage and showed no significant difference in respiratory rate compared with the control group. L-Arg at appropriate
concentration of 200 μmol/L inhibited the increase of weight loss of fruits to a certain extent and delayed the decrease of
total phenols and ascorbic acid. There was no significant difference in flavonoid contents between the treatment and control
groups during the first 21 days of storage, but flavonoid contents decreased quickly in the treated fruits thereafter. It was
suggested that exogenous L-Arg treatment at 200 μmol/L can effectively delay the senescence and quality loss of mandarin
oranges after harvest.

Key words: exogenous L-Arg, mandarin orange, color, storage quality

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