Anthersisolated from tetraploid purple coneflowerplants were cultured in vitro. The highest callus induction rate was obtained when the medium was consisted of N6 basal elements, 4% sucrose, 0.5 mg?L?1 BA, and 0.10 mg...Anthersisolated from tetraploid purple coneflowerplants were cultured in vitro. The highest callus induction rate was obtained when the medium was consisted of N6 basal elements, 4% sucrose, 0.5 mg?L?1 BA, and 0.10 mg?L?1 NAA. Various morphogenesis such as globular, heart-shape, torpedo-shapeand final state embryos as well asvarious texture calluses around were observed. Out of 110 plantlets regenerated, 104 were confirmed as diploid and the rest were as tetraploid. Plants of one diploid offspring strain presented aspecialcharacter in pot: unlike the original tetraploid plants, it grown tubular, bisexual ray florets. The results obtained in the present studies indicated that although the tetraploid purple coneflower plants produced only diploid microspores, the recovery of some useful mutants through in vitro anther cultures might be reasonably expected.展开更多
Mannitol or sorbitol was added into the Murashige and Skoog (MS) medium contain-ing certain concentrations of 6-Benzyladenine (BA) which was used to induce adventi-tious buds of Echinacea purpurea L. Results showed th...Mannitol or sorbitol was added into the Murashige and Skoog (MS) medium contain-ing certain concentrations of 6-Benzyladenine (BA) which was used to induce adventi-tious buds of Echinacea purpurea L. Results showed that the induced adventitious buds growing from medium added with 15 g·L-1 mannitol or sorbitol of the same con-centration were more consistent in height. The regeneration rates in MS medium containing 0.2 mg·L-1 BA and 15 g·L-1 mannitol were increased, while in MS medium containing 0.2 and 0.5 mg·L-1 BA, and 15 g·L-1 sorbitol, the regeneration rates were suppressed. On the other hand, genotype of explants and the concentration of BA in-fluenced the incidence of hyperhydricity, and the hyperhydricity of regenerated buds was more severe when the petiole explants were inoculated on medium with 15 g·L-1 mannitol or 15 g·L-1 sorbitol. The present study offers new possibility to the production of uniform plantlets for commercial cultivation in this important medicinal plant.展开更多
Objective:Polyphenols are complex compounds containing multiple phenolic hydroxyl groups.They are widely distributed in plants and have antioxidant activities.Whether the antioxidant activities of the cultivated varie...Objective:Polyphenols are complex compounds containing multiple phenolic hydroxyl groups.They are widely distributed in plants and have antioxidant activities.Whether the antioxidant activities of the cultivated varieties of Echinacea are similar to or better than those of the wild ones and the relationship between the accumulation of polyphenols and their antioxidant activities are still not clear.Methods:Folin-Ciocalteu method,high performance liquid chromatography(HPLC),2,2-diphenyl-1-picrylhydrazyl(DPPH)radical scavenging assay,ferric ion reducing antioxidant power(FRAP)assay,2,2'-azino-bis(3-ethylbenzothiazoline-6)-sulfonic acid(ABTS)radical scavenging assay,and Fe^(2+)chelating ability assay were used,respectively,to detect the total polyphenols and 5 kinds of caffeic acid derivatives(chicoric acid,caffeic acid,caftaric acid,chlorogenic acid,and 1,5-dicaffeoylquinic acid)in the roots,stems,leaves,and flowers,and the antioxidant activities of 3 varieties of Echinacea:E.purpurea L.,cultivar E.purpurea'Aloha',and E.purpurea'White Swan'.Results:E.purpurea L.had the highest contents of total polyphenols,5 caffeic acid derivatives and antioxidant activities,followed by E.purpurea'White Swan'and E.purpurea'Aloha',respectively.E.purpurea'White Swan'had the strongest ability to remove the DPPH,ABTS·^(+)and free radicals,and to chelate Fe^(2+);E.purpurea L.had the strongest ability to reduce FRAP.The correlation analyses revealed that the contents of total polyphenols and caffeic acid derivatives of E.purpurea L.and E.purpurea'White Swan'were correlated with their antioxidant activities.Conclusion:E.purpurea L.was the most appropriate material for the development of medicinal plants.E.purpurea'White Swan'could be used as a substitute for E.purpurea L.in terms of its antioxidant activity.展开更多
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
The extraction yields, active compounds and antioxidant properties of 50%-aqueous-ethanolic extracts of freeze-dried Echinacea purpurea flower with multi-steps and multi-batches extraction methods were assessed. In mu...The extraction yields, active compounds and antioxidant properties of 50%-aqueous-ethanolic extracts of freeze-dried Echinacea purpurea flower with multi-steps and multi-batches extraction methods were assessed. In multi-steps extraction, the extraction yields of 1st, 2nd, and 3rd extracts were 21.52%, 9.33%, and 2.90%, and their total phenols contents were 182.08, 176.33, and 177.08 mg CAE/g, respectively, with cichoric acid (62.07 - 66.57 mg/g) being the main phenolic compound. No differences in the contents of individual and total caffeic acids derivates existed among 1st, 2nd, and 3rd extracts. The dodeca-2E, 4E, 8Z, 10(E/Z)-tetraenoic acid isobutylamide (alkamide 8/9) contents of 1st, 2nd, and 3rd extracts were 505.38, 598.61, and 585.99 µg/g, respectively. In multi-batches extraction, the extracted dry weight increased with increasing the sample batches, with the extraction yields and alkamide 8/9 contents of samples decreased from 19.93% to 12.98% and 534.36 to 269.76 µg/g, respectively. The total phenol (177.25 - 186.92 mg CAE/g), individual and total caffeic acid derivatives (85.99 - 95.06 mg/g) contents of extracts among different sample batches were not significantly different, with cichoric acid (63.66 - 70.31 mg/g) being the main phenolic compound. All the prepared extracts also exhibited potent antioxidant properties. Overall, the two-step sequential extraction is desirable for extracting bioactive compounds from freeze-dried E. purpurea flower.展开更多
The plant growth regulator diethyl aminoethyl hexanoate (DA-6) has proved highly effective on micropropagation of the medicinal plant purple coneflower (Echinacea purpurea (L.) Moench), however, sharp variation of the...The plant growth regulator diethyl aminoethyl hexanoate (DA-6) has proved highly effective on micropropagation of the medicinal plant purple coneflower (Echinacea purpurea (L.) Moench), however, sharp variation of the effects existed among explants in the same treatment, making the application of DA-6 in micropropagation difficult. In order to clarify factors that influencing the treating results of DA-6, explants with different biomass dosage were prepared and inoculated onto medium supplemented with different concentrations of DA-6. It was found that among the three kinds of biomass dosage explants, the lowest biomass explants required the lowest concentration of DA-6, and the highest biomass explants required the highest concentration of DA-6 for the best results on adventitious buds regeneration. Similar results were obtained when regenerated buds of three different biomass dosages were cultured. It could be concluded from the above experimental results that for achieving better DA-6 application results, the concentration of DA-6 should be determined not only by the types but also by the biomass dosage of the explants. The present finding might help to improve the micropropagation efficiency in E. purpurea, and might be applicable for other species展开更多
Echinacea purpurea (Purple coneflower) is an immunostimulating drug, containing multiple substances. The most important substance in activity is polysaccharide, caffeic acid derivatives (cichoric acid), alkamides and ...Echinacea purpurea (Purple coneflower) is an immunostimulating drug, containing multiple substances. The most important substance in activity is polysaccharide, caffeic acid derivatives (cichoric acid), alkamides and glycoproteins. It is not clear yet, which substances are responsible for activity. Cichoric acid is an appropriate marker of the quality of Echinacea purpurea containing product, because it has immune stimulatory effects and it is susceptible to degradation. In this study a TLC scanner system and HPLC method has been used for identification and determination of cichoric acid in aerial parts of Echinacea purpurea. The results showed that the cichoric acid content of Echinacea purpurea cultivated in Iran is about 1.50 ±0.65% (w/w) which is comparable with cichoric acid content in native plants. The local conditions have no significant effect on cichoric acid content as a biomarker of Echinacea purpurea quality.展开更多
Aim To separate and identify chemical constituents of Ehinacea purpurea. Methods Five compounds were isolated from the plant using chromatography. Their structures were elucidated by spectroscopy. Results Five compoun...Aim To separate and identify chemical constituents of Ehinacea purpurea. Methods Five compounds were isolated from the plant using chromatography. Their structures were elucidated by spectroscopy. Results Five compounds were isolated and their structures were identified as 2, 6-dimethyl-7-octene-2, 3, 6-triol-2-O-β-D-gtucopyranoside (1), 7, 8-furocoumarin (2), 6-methoxy-7-hydroxycoumarin (3), caffeic acid (4), methyl catfeate (5), and ethyl catfeate(6). Conclusion All these compounds were obtained from the plant for the first time.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Anthersisolated from tetraploid purple coneflowerplants were cultured in vitro. The highest callus induction rate was obtained when the medium was consisted of N6 basal elements, 4% sucrose, 0.5 mg?L?1 BA, and 0.10 mg?L?1 NAA. Various morphogenesis such as globular, heart-shape, torpedo-shapeand final state embryos as well asvarious texture calluses around were observed. Out of 110 plantlets regenerated, 104 were confirmed as diploid and the rest were as tetraploid. Plants of one diploid offspring strain presented aspecialcharacter in pot: unlike the original tetraploid plants, it grown tubular, bisexual ray florets. The results obtained in the present studies indicated that although the tetraploid purple coneflower plants produced only diploid microspores, the recovery of some useful mutants through in vitro anther cultures might be reasonably expected.
文摘Mannitol or sorbitol was added into the Murashige and Skoog (MS) medium contain-ing certain concentrations of 6-Benzyladenine (BA) which was used to induce adventi-tious buds of Echinacea purpurea L. Results showed that the induced adventitious buds growing from medium added with 15 g·L-1 mannitol or sorbitol of the same con-centration were more consistent in height. The regeneration rates in MS medium containing 0.2 mg·L-1 BA and 15 g·L-1 mannitol were increased, while in MS medium containing 0.2 and 0.5 mg·L-1 BA, and 15 g·L-1 sorbitol, the regeneration rates were suppressed. On the other hand, genotype of explants and the concentration of BA in-fluenced the incidence of hyperhydricity, and the hyperhydricity of regenerated buds was more severe when the petiole explants were inoculated on medium with 15 g·L-1 mannitol or 15 g·L-1 sorbitol. The present study offers new possibility to the production of uniform plantlets for commercial cultivation in this important medicinal plant.
基金supported by the Technology and Development Project of the Finance Department of Guangdong Province,China(No.[2015]639)the Technology Project of the Educational Commission of Guangdong Province of China(No.[2015]3)。
文摘Objective:Polyphenols are complex compounds containing multiple phenolic hydroxyl groups.They are widely distributed in plants and have antioxidant activities.Whether the antioxidant activities of the cultivated varieties of Echinacea are similar to or better than those of the wild ones and the relationship between the accumulation of polyphenols and their antioxidant activities are still not clear.Methods:Folin-Ciocalteu method,high performance liquid chromatography(HPLC),2,2-diphenyl-1-picrylhydrazyl(DPPH)radical scavenging assay,ferric ion reducing antioxidant power(FRAP)assay,2,2'-azino-bis(3-ethylbenzothiazoline-6)-sulfonic acid(ABTS)radical scavenging assay,and Fe^(2+)chelating ability assay were used,respectively,to detect the total polyphenols and 5 kinds of caffeic acid derivatives(chicoric acid,caffeic acid,caftaric acid,chlorogenic acid,and 1,5-dicaffeoylquinic acid)in the roots,stems,leaves,and flowers,and the antioxidant activities of 3 varieties of Echinacea:E.purpurea L.,cultivar E.purpurea'Aloha',and E.purpurea'White Swan'.Results:E.purpurea L.had the highest contents of total polyphenols,5 caffeic acid derivatives and antioxidant activities,followed by E.purpurea'White Swan'and E.purpurea'Aloha',respectively.E.purpurea'White Swan'had the strongest ability to remove the DPPH,ABTS·^(+)and free radicals,and to chelate Fe^(2+);E.purpurea L.had the strongest ability to reduce FRAP.The correlation analyses revealed that the contents of total polyphenols and caffeic acid derivatives of E.purpurea L.and E.purpurea'White Swan'were correlated with their antioxidant activities.Conclusion:E.purpurea L.was the most appropriate material for the development of medicinal plants.E.purpurea'White Swan'could be used as a substitute for E.purpurea L.in terms of its antioxidant activity.
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The extraction yields, active compounds and antioxidant properties of 50%-aqueous-ethanolic extracts of freeze-dried Echinacea purpurea flower with multi-steps and multi-batches extraction methods were assessed. In multi-steps extraction, the extraction yields of 1st, 2nd, and 3rd extracts were 21.52%, 9.33%, and 2.90%, and their total phenols contents were 182.08, 176.33, and 177.08 mg CAE/g, respectively, with cichoric acid (62.07 - 66.57 mg/g) being the main phenolic compound. No differences in the contents of individual and total caffeic acids derivates existed among 1st, 2nd, and 3rd extracts. The dodeca-2E, 4E, 8Z, 10(E/Z)-tetraenoic acid isobutylamide (alkamide 8/9) contents of 1st, 2nd, and 3rd extracts were 505.38, 598.61, and 585.99 µg/g, respectively. In multi-batches extraction, the extracted dry weight increased with increasing the sample batches, with the extraction yields and alkamide 8/9 contents of samples decreased from 19.93% to 12.98% and 534.36 to 269.76 µg/g, respectively. The total phenol (177.25 - 186.92 mg CAE/g), individual and total caffeic acid derivatives (85.99 - 95.06 mg/g) contents of extracts among different sample batches were not significantly different, with cichoric acid (63.66 - 70.31 mg/g) being the main phenolic compound. All the prepared extracts also exhibited potent antioxidant properties. Overall, the two-step sequential extraction is desirable for extracting bioactive compounds from freeze-dried E. purpurea flower.
文摘The plant growth regulator diethyl aminoethyl hexanoate (DA-6) has proved highly effective on micropropagation of the medicinal plant purple coneflower (Echinacea purpurea (L.) Moench), however, sharp variation of the effects existed among explants in the same treatment, making the application of DA-6 in micropropagation difficult. In order to clarify factors that influencing the treating results of DA-6, explants with different biomass dosage were prepared and inoculated onto medium supplemented with different concentrations of DA-6. It was found that among the three kinds of biomass dosage explants, the lowest biomass explants required the lowest concentration of DA-6, and the highest biomass explants required the highest concentration of DA-6 for the best results on adventitious buds regeneration. Similar results were obtained when regenerated buds of three different biomass dosages were cultured. It could be concluded from the above experimental results that for achieving better DA-6 application results, the concentration of DA-6 should be determined not only by the types but also by the biomass dosage of the explants. The present finding might help to improve the micropropagation efficiency in E. purpurea, and might be applicable for other species
文摘Echinacea purpurea (Purple coneflower) is an immunostimulating drug, containing multiple substances. The most important substance in activity is polysaccharide, caffeic acid derivatives (cichoric acid), alkamides and glycoproteins. It is not clear yet, which substances are responsible for activity. Cichoric acid is an appropriate marker of the quality of Echinacea purpurea containing product, because it has immune stimulatory effects and it is susceptible to degradation. In this study a TLC scanner system and HPLC method has been used for identification and determination of cichoric acid in aerial parts of Echinacea purpurea. The results showed that the cichoric acid content of Echinacea purpurea cultivated in Iran is about 1.50 ±0.65% (w/w) which is comparable with cichoric acid content in native plants. The local conditions have no significant effect on cichoric acid content as a biomarker of Echinacea purpurea quality.
文摘Aim To separate and identify chemical constituents of Ehinacea purpurea. Methods Five compounds were isolated from the plant using chromatography. Their structures were elucidated by spectroscopy. Results Five compounds were isolated and their structures were identified as 2, 6-dimethyl-7-octene-2, 3, 6-triol-2-O-β-D-gtucopyranoside (1), 7, 8-furocoumarin (2), 6-methoxy-7-hydroxycoumarin (3), caffeic acid (4), methyl catfeate (5), and ethyl catfeate(6). Conclusion All these compounds were obtained from the plant for the first time.
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。
文摘目的建立高效液相色谱法(HPLC)对紫锥菊中3种酚酸类成分菊苣酸,绿原酸和咖啡酸的含量进行测定,为紫锥菊及其制剂的质量评价和进一步应用提供依据。方法色谱柱为Diamonsil^(TM)C_(18)色谱柱(5μm,250 mm×4.6 mm);乙腈(B)-0.1%磷酸水(A)梯度洗脱;流速1.0 m L/min;检测波长330nm;柱温为室温;进样量为20μL。结果紫锥菊中3种酚酸类化合物在该色谱条件下有良好的分离度,在相应的线性范围内呈现良好的线性关系,重复性良好。平均回收率均在99.3%~100.4%范围内,RSD<2.0%。结论该测定方法简便、准确,可用于紫锥菊及紫锥菊提取物的质量控制。
基金Supported by National Natural Science Foundation of China(31472230)Natural Science Foundation of Hebei Province(C2014407068)Project of Science and Technology Department of Hebei Province(14966610D)
