Cichoric acid is the main phenolic compound in the root and rhizome of the medicinal part, Echinacea purpurea that is known for possessing immune enhancing characteristics. In this study, we analysis the the synthesis...Cichoric acid is the main phenolic compound in the root and rhizome of the medicinal part, Echinacea purpurea that is known for possessing immune enhancing characteristics. In this study, we analysis the the synthesis and storage sites of phenolic compound in E. purpurea. We used fluorescent microscopy, transmission electron microscopy, cytochemical and immunocytochemical localization to observe the distribution of phenolic compounds. Our results show that the phenolic compounds were mostly distributed in the cortex parenchyma cells, vascular parenchyma cells and pith parenchyma cells in the root and rhizome, and mainly present in the vacuoles, large intercellular spaces and their surrounding cell walls. No phenolic compounds were observed in the cytoplasm and the organelles. We concluded that the phenolic compounds were synthetized in the cortex parenchyma cells, vascular parenchyma cells and pith parenchyma cells in the root and rhizome, and stored in the vacuoles of parenchyma cells. The above results provided significantly cytological information for further approaching the metabolic regulation and transfer pathways of phenolic compounds in biochemistry and molecular biology.展开更多
目的：建立RP-HPLC测定紫锥菊提取物中2种咖啡酸衍生物含量的方法，同时测定5种样品。方法：采用RP．HPLC同时测定紫锥菊提取物中2种主要咖啡酸衍生物：单咖啡酰酒石酸、菊苣酸的含量。色谱条件为Agilent ZORBAX Stable Bond C18柱（5μ...目的：建立RP-HPLC测定紫锥菊提取物中2种咖啡酸衍生物含量的方法，同时测定5种样品。方法：采用RP．HPLC同时测定紫锥菊提取物中2种主要咖啡酸衍生物：单咖啡酰酒石酸、菊苣酸的含量。色谱条件为Agilent ZORBAX Stable Bond C18柱（5μm，4．6mm×250mm）；流动相：A（乙腈）-B（0．1％磷酸溶液）梯度洗脱，流速：1．2mL／min；检测波长：330nm。结果：2种主要咖啡酸衍生物在色谱条件下有良好的分离度，浓度与峰面积之间线性关系良好，线性范围：单咖啡酰酒石酸在0．064～0．416μg，菊苣酸0．1—0．7μg。平均回收率：单咖啡酰酒石酸为99．37％．RSD为1．50％；菊苣酸为100．44％，RSD为1．71％。结论：方法简便、精确、专属性强，可作为提取物和研发新药的质量控制。展开更多
文摘Cichoric acid is the main phenolic compound in the root and rhizome of the medicinal part, Echinacea purpurea that is known for possessing immune enhancing characteristics. In this study, we analysis the the synthesis and storage sites of phenolic compound in E. purpurea. We used fluorescent microscopy, transmission electron microscopy, cytochemical and immunocytochemical localization to observe the distribution of phenolic compounds. Our results show that the phenolic compounds were mostly distributed in the cortex parenchyma cells, vascular parenchyma cells and pith parenchyma cells in the root and rhizome, and mainly present in the vacuoles, large intercellular spaces and their surrounding cell walls. No phenolic compounds were observed in the cytoplasm and the organelles. We concluded that the phenolic compounds were synthetized in the cortex parenchyma cells, vascular parenchyma cells and pith parenchyma cells in the root and rhizome, and stored in the vacuoles of parenchyma cells. The above results provided significantly cytological information for further approaching the metabolic regulation and transfer pathways of phenolic compounds in biochemistry and molecular biology.
文摘目的：建立RP-HPLC测定紫锥菊提取物中2种咖啡酸衍生物含量的方法，同时测定5种样品。方法：采用RP．HPLC同时测定紫锥菊提取物中2种主要咖啡酸衍生物：单咖啡酰酒石酸、菊苣酸的含量。色谱条件为Agilent ZORBAX Stable Bond C18柱（5μm，4．6mm×250mm）；流动相：A（乙腈）-B（0．1％磷酸溶液）梯度洗脱，流速：1．2mL／min；检测波长：330nm。结果：2种主要咖啡酸衍生物在色谱条件下有良好的分离度，浓度与峰面积之间线性关系良好，线性范围：单咖啡酰酒石酸在0．064～0．416μg，菊苣酸0．1—0．7μg。平均回收率：单咖啡酰酒石酸为99．37％．RSD为1．50％；菊苣酸为100．44％，RSD为1．71％。结论：方法简便、精确、专属性强，可作为提取物和研发新药的质量控制。
