食品科学

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O2/CO2气调中CO2对西兰花叶绿素降解及保鲜作用

孙志文1,吕凤艳1,郭衍银1,*,王兆全2   

  1. 1.山东理工大学农业工程与食品科学学院,山东 淄博 255049;
    2.潍坊昌邑市检验检测中心,山东 潍坊 261300
  • 出版日期:2016-09-25 发布日期:2016-09-26
  • 通讯作者: 郭衍银
  • 基金资助:

    山东理工大学青年教师发展支持计划项目(4072-115008);国家自然科学基金面上项目(31671900)

Effect of CO2 Concentration in O2/CO2 Controlled Atmosphere on Chlorophyll Degradation and Quality Preservation in Chilled Broccoli

SUN Zhiwen1, LÜ Fengyan1, GUO Yanyin1,*, WANG Zhaoquan2   

  1. 1. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255049, China;
    2. Inspection and Testing Center of Changyi City, Weifang 261300, China
  • Online:2016-09-25 Published:2016-09-26
  • Contact: GUO Yanyin

摘要:

为研究O2/CO2气调环境下CO2对西兰花叶绿素降解及保鲜效果的影响,在固定O2为50%的前提下,分别设置CO2体积分数为20%、30%、40%和50%,同时以自然大气为对照,对5 ℃贮藏条件下西兰花的总叶绿素、叶绿素a和叶绿素b含量,叶绿素还原酶、脱镁叶绿素酶活性,乙醇、乙醛和抗坏血酸含量进行了定期测定。结果表明:过低或过高的CO2体积分数都会对西兰花贮藏品质造成不利影响,CO2体积分数过高易造成西兰花无氧呼吸生成乙醇、乙醛;CO2体积分数过低则造成西兰花叶绿素还原酶、脱镁叶绿素酶活性升高,导致叶绿素迅速降解,引起西兰花黄化和抗坏血酸的损失。本实验条件下,50% O2+40% CO2处理可有效延缓西兰花叶绿素降解,且不会造成乙醇、乙醛的积累,达到很好的保鲜效果。

关键词: 西兰花, 二氧化碳, 氧气, 品质, 气调, 保鲜

Abstract:

In order to study the effect of CO2 concentration in O2/CO2 controlled atmosphere on chlorophyll degradation
and quality preservation in chilled broccoli, fresh broccoli were in atmospheres consisting of 50% O2 and CO2 at four
different concentration levels of 20%, 30%, 40% and 50% or air and then stored at 5 ℃. During storage, the contents of
total chlorophyll, chlorophyll a, chlorophyll b, ethanol, acetaldehyde and ascorbic acid, and the activities of chlorophyllase
and Mg-dechelatase were regularly determined. The results showed that too low or too high CO2 proportion in controlled
atmospheres had a disadvantageous effect on the storage quality of broccoli. Too high CO2 could accumulate the contents of
ethanol and acetaldehyde through anaerobic respiration. However, too low CO2 could promote the activities of chlorophyllase
and Mg-dechelatase, leading to rapid degradation of chlorophyll, yellowing and ascorbic acid loss in broccoli. Under the
experimental condition in this study, 50% O2 + 40% CO2 treatment could effectively retard chlorophyll degradation and avoid
the accumulation of ethanol and acetaldehyde and therefore have an ideal effect on quality maintenance of stored broccoli.

Key words: broccoli, carbon dioxide, oxygen, quality, controlled atmosphere, storage

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