食品科学 ›› 2018, Vol. 39 ›› Issue (10): 131-137.doi: 10.7506/spkx1002-6630-201810021

• 生物工程 • 上一篇    下一篇

椪柑浮皮时挥发性成分变化及萜烯类物质合成基因表达特征

姚世响1,2,曹琦1,谢姣1,邓丽莉1,2,曾凯芳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:2018-05-25 发布日期:2018-05-15
  • 基金资助:
    国家自然科学基金青年科学基金项目(31601520);重庆市社会事业与民生保障科技创新专项(cstc2016shms-ztzx80005); 中国博士后科学基金项目(2016M592620);重庆市博士后科研项目(Xm2016119); 中央高校基本科研业务费专项(XDJK2016C060;SWU115083)

Changes in Volatile Constituents and Gene Expression Involved in Terpenoid Biosynthesis in Ponkan Fruit Peel during Peel Puffing

YAO Shixiang1,2, CAO Qi1, XIE Jiao1, DENG Lili1,2, ZENG Kaifang1,2,*   

  1. (1. College of Food Science, Southwest University, Chongqing 400715, China; 2. Chongqing Engineering Research Center for Special Food, Chongqing 400715, China)
  • Online:2018-05-25 Published:2018-05-15

摘要: 以椪柑果实为材料,运用气相色谱-质谱和RNA-Seq技术分析在浮皮时,果皮挥发性物质的变化规律以及萜烯类物质合成途径基因的表达特征。结果表明:从椪柑果皮中鉴定到53?种挥发性物质,其中萜烯类化合物的相对含量为96%。浮皮发生时,果皮挥发性物质的组分并没有改变,但有32?种组分的含量发生了变化;挥发性物质总量在浮皮时降低为正常果实的82%,萜烯类化合物降为正常果实的81.4%。鉴定到12?个萜烯类化合物合成途径的关键基因,大部分在浮皮时表达量降低。本研究首次阐明椪柑果皮挥发性物质组分及含量在浮皮时的变化特征,并且这种含量的降低与萜烯类物质合成途径基因的下调密切相关。

关键词: 浮皮, 挥发性物质, 椪柑, 气相色谱-质谱法, RNA-Seq

Abstract: The present study employed gas chromatography-mass spectrometry (GC-MS) and RNA-Seq to probe the changes in volatile constituents and the expression of genes involved in terpenoid biosynthesis in ponkan fruit peel during peel puffing. The results obtained were as follows. A total of 53 volatile components were identified in normal and puffing fruits, with terpenoids accounting for up to 96% of the total amount. Normal and puffing fruits did not differ with respect to volatile composition except for the contents of 32 volatile components. The contents of total volatile compounds and terpenoids in puffing fruits decreased to 82% and 81.4% as compared with the normal fruits, respectively. A total of 12 key genes involved in terpenoid biosynthesis were identified, most of which were down-regulated significantly during peel puffing. This study revealed for the first time the pattern of change in volatile constituents in ponkan fruit peel during peel puffing, and that this dynamic pattern was closely related with the down-regulation of gene expression involved in terpenoid biosynthesis.

Key words: peel puffing, volatile constituents, ponkan fruits, gas chromatography-mass spectrometry (GC-MS), RNA-Seq

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