中国农业科学 ›› 2018, Vol. 51 ›› Issue (13): 2551-2560.doi: 10.3864/j.issn.0578-1752.2018.13.010

• 园艺 • 上一篇    下一篇

超高效液相色谱-四级杆飞行时间质谱结合Progenesis QI 分析不同品种橙的指纹图谱及其差异性代谢物

赵希娟,赵无疾,许华超   

  1. 西南大学园艺园林学院/南方山地园艺学教育部重点实验室,重庆 400715
  • 收稿日期:2017-12-14 出版日期:2018-07-01 发布日期:2018-07-01
  • 作者简介:赵希娟,E-mail:xijuanzh@swu.edu.cn
  • 基金资助:
    中央高校基本科研业务费(XDJK2016B014,XDJK2017D093和SWU115065)

Analysis of the Fingerprints of Different Orange Varieties and Their Differential Metabolites Based on Ultra-Performance Liquid Chromatography Coupled with Quadrupole Time-of-Flight Mass Spectrometry and Progenesis QI

ZHAO XiJuan, ZHAO WuJi, XU HuaChao   

  1. Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education/College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715
  • Received:2017-12-14 Online:2018-07-01 Published:2018-07-01

摘要: 【目的】建立分析不同品种橙之间差异性代谢物的方法,找出各品种橙的特征代谢物,服务于橙的代谢组学研究,为橙果实和橙汁的鉴别提供参考。【方法】选取相同产地8个不同的橙品种,取其果皮的甲醇提取物,使用超高效液相色谱-四级杆飞行时间质谱(UPLC-QToF-MS)得到对应的指纹图谱,结合组学软件Progenesis QI,通过主成分分析、偏最小二乘判别分析和变量变化趋势图等进行综合评价,筛选出各品种间的差异性代谢物。根据精确分子量、二级碎片、标准品以及数据库和相关文献信息,对差异性代谢物进行鉴定。【结果】通过UPLC-QToF-MS指纹图谱得出8个橙品种的代谢物存在明显差异,使用Progenesis QI建立的流程筛选得到各品种正、负离子模式下的差异性代谢物,包含保留时间、分子式、二级碎片等信息。鉴定出17种差异代谢物,其中3-羟基-5,7,3',4'-四甲氧基黄酮和木犀草素-7-O-新橙皮糖苷是血橙区别于其他7种橙的特征代谢物,橙皮苷是S26锦橙的代谢标志物,芸香柚皮苷-4'-O-葡萄糖苷和异橙黄酮可以作为8045甜橙的特征代谢物。【结论】基于UPLC-QToF-MS和Progenesis QI建立的方法可以筛选出8个品种橙果实的差异性代谢物,鉴定了其中的17种物质,分别对应不同品种。该研究方法和技术路线具有通用性,适用于不同水果、不同产地、不同成熟度等因素引起的样品差异分析。

关键词: 超高效液相色谱-四级杆飞行时间质谱, 橙, Progenesis QI, 代谢物

Abstract: 【Objective】The objective of this study is to establish an efficient method to investigate the differences between different varieties of oranges, and to find their differential metabolites, which will serve the citrus metabolomics and provide reference for the identification of oranges and orange juice. 【Method】 8 orange cultivars from the same area were chosen to obtain the methanol extracts of their peels, and then based on ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-QToF-MS), the LC-MS fingerprints of the 8 oranges were obtained with obvious differences. Combined with the software Progenesis QI, the differential metabolites were screened in positive and negative modes through principal component analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA) as well as loadings plots and VIP (variable importance for projection) values. Furthermore, the differential metabolites were identified based on retention times, accurate mass, MS/MS fragments, reference standards and public databases.【Result】Based on the established method, differential metabolites of the 8 orange cultivars were screened. 17 compounds had been identified and among them, and 6 compounds were confirmed by comparison with their commercial standards. 3-Hydroxy-5,7,3',4'-tetramethoxyflavone and luteolin-7-O-neohesperidoside were the characteristic metabolites of Xuecheng. Hesperidin was the marker compound of S26 Jincheng. Narirutin-4'-glucoside and Isosinensetin could act as the characteristic metabolites of 8045 Tiancheng. 【Conclusion】 The method was versatile and suitable for the analysis of sample differences caused by varieties, geographical origins and maturity.

Key words: ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry, orange, Progenesis QI, metabolites