基于植物代谢组学的栽培型与野生型野菊花的化学成分比较及定量分析
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摘要
目的为研究栽培型与野生型野菊花药材之间的化学成分差异。方法采用基于超高效液相色谱-四极杆-飞行时间质谱(UPLC-Q-T0F/MS)技术结合化学计量学对栽培和野生型野菊花药材的整体化学轮廓进行比较,并采用超高效液相(UPLC)对其中的主要差异成分进行定量分析。结果主成分分析(PCA)分析结果显示栽培型与野生型野菊花在主成分t[1]方向有明显区分,表明两者的化学组成存在显著差异。随后采用正交偏最小二乘法判别分析(0PLS-DA)方法筛选和鉴定两者的差异成分,结果显示,香叶木素-7-0-芸香苷、刺槐素-7-0-(6″-0-α-L-鼠李吡喃糖-β-槐糖苷)、木犀草素、蒙花苷、5-羟基-4′-甲氧基-黄酮-7-0-α-L-吡喃鼠李糖(1→6)[2-0-乙酰-β-D-吡喃葡萄糖(1→2)]-β-D吡喃葡萄糖苷、芹菜素、3,5-二咖啡酰奎宁酸、4,5-二咖啡酰奎宁酸和刺槐素含量在两者间存在显著性差异,可以作为区分栽培和野生野菊花的特征性成分。结论植物代谢组学技术能快速筛选特征性化学成分,为野菊花的质量评价提供有效的手段。
OBJECTIVE To evaluate the quality of cultivated and wild Flos Chrysanthemi Indici and to uncover the differential chemical ingredients and the contents.METHODS An integrated strategy of global chemical profiling using ultra performance liquid chromatography coupled with tandem quadmpole time-of-flight mass spectrometry and chemometric approach was applied to compare the global chemical profiling of cultivated and wild Flos Chrysanthemi Indici,then determination the main differential ingredients by UPLC.RESULTS Principal component analysis showed that wild and cultivated Flos Chrysanthemi Indici could be separated clearly,suggesting a big chemical difference existed between them.Supervised OPLS-DA analysis was applied to screening and identifying the differential ingredients.As a result,nine ingredients including diosmetin-7-O-rutinoside,acacetin-7-O-(6"-O-α-L-rhamnopyranosyl-β-sophoroside),luteolin,linarin,5-hydroxy-4'-methoxy-flavone-7-O-α-L-rhamnopyranosyl(1→6)[2-O-acetyl-β-D-glucopyr anosyl(1→2)]-β-Dglucopyranoside,apigenin,3,5-dicaffeoylquinic acid,4,5-dicaffeoylquinic acid and acacetin have a significant difference between cultivated and wild types,which could been considered as characteristic chemical markers for distinguishing cultivated Flos Chrysanthemi Indici from wild type.CONCLUSION This metabolomics-based approach is effective to screening characteristic chemical markers for quality evaluation of Flos Chrysanthemi Indici.
引文
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