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Effects of melatonin treatment on the enzymatic browning and nutritional quality of fresh-cut pear fruit

机译：褪黑素处理对鲜切梨果实酶促褐变和营养品质的影响

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摘要

The effects of exogenous melatonin treatment on the enzymatic browning and nutritional quality of fresh-cut pear fruit were investigated. Fresh-cut fruit soaked with 0, 0.05, 0.1 and 0.5 mM melatonin were stored at 4 degrees C. Our results showed that 0.1 mM melatonin treatment was optimal for reducing the surface browning and maintaining the titratable acidity of the fresh-cut fruit, which significantly decreased MDA and H2O2 contents and the growth of microorganism, enhanced total phenolic content and antioxidant capacity, and delayed the reduction of ascorbic acid. Furthermore, melatonin treatment at 0.1 mM decreased the expression of genes involving in enzymatic browning pathway including POD, PPO1, PPO5 and LOX1, and reduced PPO activity. Moreover, this treatment increased the expression of PAL and CHS, and enhanced PAL and CHS activities. These results showed that melatonin treatment might be a promising strategy to alleviate browning and improve the nutritional quality of fresh-cut pear fruit.
机译：研究了外源褪黑素处理对鲜切梨果实酶促褐变和营养品质的影响。将浸泡有0、0.05、0.1和0.5 mM褪黑素的鲜切水果保存在4摄氏度下。我们的结果表明，0.1 mM褪黑素处理对于减少鲜切水果的表面褐变和保持可滴定酸度是最佳的，显着降低了MDA和H2O2含量以及微生物的生长，提高了总酚含量和抗氧化能力，并延迟了抗坏血酸的还原。此外，以0.1 mM褪黑素处理会降低涉及酶促褐变途径的基因（包括POD，PPO1，PPO5和LOX1）的表达，并降低PPO活性。而且，这种治疗增加了PAL和CHS的表达，并增强了PAL和CHS的活性。这些结果表明褪黑激素治疗可能是减轻鲜切梨果实褐变和改善营养品质的一种有前途的策略。

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  • 来源
    《Food Chemistry》 |2019年第30期|125116.1-125116.8|共8页
  • 作者

    Zheng Huanhuan; Liu Wei; Liu Shuai; Liu Changhong; Zheng Lei;

  • 作者单位

    Hefei Univ Technol, Sch Food & Biol Engn, Hefei 230009, Anhui, Peoples R China;

    Hefei Univ, Intelligent Control & Compute Vis Lab, Hefei 230601, Anhui, Peoples R China;

    Hefei Univ Technol, Sch Food & Biol Engn, Hefei 230009, Anhui, Peoples R China;

    Hefei Univ Technol, Sch Food & Biol Engn, Hefei 230009, Anhui, Peoples R China;

    Hefei Univ Technol, Sch Food & Biol Engn, Hefei 230009, Anhui, Peoples R China|Anhui Modern Agr Ind Technol Syst, Res Lab Agr Environm & Food Safety, Hefei 230009, Anhui, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Melatonin; Enzymatic browning; Nutritional quality; Antioxidant capacity; Fresh-cut pear fruit;

    机译：褪黑素;酶促褐变;营养质量;抗氧化能力;鲜切梨果;

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