植物精油对冷藏大黄鱼优势腐败菌的抑制作用及其机制
作者:
作者单位:

大连海洋大学,大连海洋大学,大连海洋大学,大连海洋大学,大连海洋大学,大连海洋大学

作者简介:

通讯作者:

中图分类号:

基金项目:

国家科技支撑计划(2015BAD16B00)子项目(2015BAD16B08);辽宁省教育厅项目(L201607);辽宁省博士启动基金(20131010)


Antimicrobial effects and mechanism of action of essential oils against dominant spoilage bacteria isolated from large yellow croaker (Larimichthys crocea) during chilled storage
Author:
Affiliation:

Dalian Ocean University,,,,,Dalian Ocean University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为探讨天然植物精油对冷藏大黄鱼贮藏过程中优势腐败菌的抑制作用及其机制,实验首先对冷藏大黄鱼的优势腐败菌进行分离纯化,并通过16S rDNA序列分析及生理生化实验进行菌株鉴定;采用纸片扩散法和微量肉汤稀释法检测14种植物精油或其组分对腐败菌株的抑菌活性;在阐明植物精油抗菌活性的基础上,再对植物精油处理后的大黄鱼气味进行感官可接受度检验,以筛选出具有高效抗菌活性和良好感官接受性的精油保鲜剂;实验通过细菌形态扫描电镜观察、胞内乳酸脱氢酶及核酸释放研究山苍子精油对不同腐败菌株的膜损伤作用,以初步阐明其抗菌机制;最后,通过检测微生物数量、产硫菌数量、挥发性盐基氮(TVB-N)及组胺含量变化来考察山苍子精油对冷藏大黄鱼潜在的保鲜效果;从冷藏大黄鱼中分离得到6株优势腐败菌,分别为腐败希瓦氏菌4株,热杀索丝菌1株,温和气单胞菌1株;14种植物精油对腐败菌株具有不同抑制活性,其中肉桂醛抑菌活性最强,最低抑菌浓度为0.125 μL/mL,其次为丁香酚、百里香酚、柠檬醛、柠檬草及山苍子精油,最低抑菌浓度均 ≤ 0.5 μL/mL;丁香酚、百里香酚、柠檬醛、柠檬草及山苍子精油使用后未导致大黄鱼气味的感官劣化,且可矫正大黄鱼肉的腥味;山苍子精油可破坏腐败菌株的细胞膜,并导致胞内蛋白酶和核酸外泄。经4 μL/mL山苍子精油处理后,冷藏过程中大黄鱼片的菌落总数、产硫菌数、TVB-N及组胺含量显著降低。研究表明,肉桂醛、丁香酚、百里香酚、柠檬醛、柠檬草及山苍子精油对大黄鱼特定腐败菌具有显著抑制作用,芳香酚和富含柠檬醛的精油使用后不影响大黄鱼的感官接受性,有望作为天然保鲜剂用于冷藏海产品的保鲜。

    Abstract:

    To evaluate the feasibility of essential oils as natural preservatives in extending the shelf life of chilled large yellow croaker, the antimicrobial efficacy of 14 essential oils against the dominant spoilage bacteria from large yellow croaker (Larimichthys crocea) during chilled storage at 4℃ was investigated. The dominant spoilage bacteria were isolated from skin, body cavity, gill and intestine of large yellow croaker, and identified by the sequence similarity analysis of the 16S rDNA genes and physiological and biochemical test. The paper disc diffusion method and microbroth dilution technique were employed for the determination of antimicrobial activity of 14 essential oils. Sensory acceptability of fish treated with different quantities of essential oils were evaluated using a nine-point hedonic scale ranging from 1 (most disliked) to 9 (most liked). The mode of action of Litsea cubeba oil against spoilage bacteria was studied by scanning electron micrograph, measurement of release of intracellular lactate dehydrogenase (LDH), and 260 nm absorbing material. After dipping in a solution containing 4 μL/mL L. cubeba oil, the total microbial load, H2S- producing bacteria, total volatile bases nitrogen(TVB-N), and histamine content of refrigerated large yellow croaker fillets as a function storage time were determined. The results showed that a total of 6 strains of bacteria were identified as four strains of Shewanella spp., one strain of Brochothrix thermosphacta and one strain of Aeromonas sobria. The 14 essential oils showed different antimicrobial activity against spoilage bacteria isolates, and cinnamaldehyde had thse highest activity with a minimum inhibitory concentration(MIC) of 0.125 μL/mL, followed by eugenol, thymol, citral, Cymbopogon citratus and L. cubeba oil, with MIC ≤ 0.5 μL/mL. The flavours of large yellow croaker fillets treated with eugenol, thymol, citral, C. citratus and L. cubeba oil were found to be acceptable. L. cubeba oil can disrupt the cytomembrane of spoilage bacteria isolates and cause the leakage of protease and nucleic acid. Dipping fish fillets in a solution of 4 μL/mL L. cubeba oil significantly reduced the total microbial load, H2S-producing bacteria, TVB-N, and histamine content. Eugenol, thymol, citral, C. citratus, and L. cubeba oil showed high antimicrobial activity against the dominant spoilage bacteria isolates from chilled large yellow croaker, and had no adverse effects on the organoleptic properties of the fish fillets. Therefore, it can be concluded that essential oils had the potential to be used as natural preservatives to enhance the shelf-life of seafood during chilled storage.

    参考文献
    相似文献
    引证文献
引用本文

孟玉霞,崔惠敬,赵前程,李萌,边楚涵,白如健,马永生.植物精油对冷藏大黄鱼优势腐败菌的抑制作用及其机制[J].水产学报,2018,42(7):1140~1153

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2017-03-03
  • 最后修改日期:2017-06-08
  • 录用日期:2017-10-11
  • 在线发布日期: 2018-06-27
  • 出版日期: