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Correlation between polyphenol Contents and Antioxidant Activities in Different Echinacea Purpurea Varieties

Current Medical Science 2023年第4期43卷 831-837页

作者： Xiao-jing LIN Zheng-shi-yu LAI Qun LUO Mei KONG Min-jian LIANG Hong WU Mei BAI Guangdong Technology Research Center for Traditional Chinese Veterinary Medicine and Natural Medicine South China Agricultural UniversityGuangzhou 510642China Qilu Animal Health Products Company Jinan 250033China State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources College of Life SciencesSouth China Agricultural UniversityGuangzhou 510642China

Objective:polyphenols are complex compounds containing multiple phenolic hydroxyl *** are widely distributed in plants and have antioxidant *** 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 ***: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:*** L.,cultivar ***'Aloha',and ***'White Swan'.Results:*** *** the highest contents of total polyphenols,5 caffeic acid derivatives and antioxidant activities,followed by ***'White Swan'and ***'Aloha',***'White Swan'had the strongest ability to remove the DPPH,ABTS·^(+)and free radicals,and to chelate Fe^(2+);*** *** the strongest ability to reduce *** correlation analyses revealed that the contents of total polyphenols and caffeic acid derivatives of *** *** ***'White Swan'were correlated with their antioxidant ***:*** *** the most appropriate material for the development of medicinal ***'White Swan'could be used as a substitute for *** *** terms of its antioxidant activity.

关键词： antioxidant activity caffeic acid derivatives Echinacea purpurea medicinal plants total polyphenol

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Mobilizing the seed storage oil in milk thistle (Silybum marianum) can supply energy for seed germination and early seedling growth and apply as TAGs breakdown marker

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Oil Crop Science 2023年第4期8卷 207-216页

作者： Mohammad Shahin Daneshmandi Maryam Mohammadi Maryam Asadi Adele Robati Department of Plant Production Faculty of Agriculture Science and Natural ResourcesUniversity of Torbat HeydariehP.O.Box 95161-68595Torbat HeydariehIran

Milk thistle(Silybum marianum)is a crucial medicinal plant containing a large amount of *** the study,the changes in storage oil during seed germination and seedling transition from heterotrophic phases were *** results showed that seed oil decreased from 19.53%to 0.88%on the 7th day of seedling *** hydrolysis continued until the 4th day of germination with a low slope,but then increased the use of oils in seed germination end seedling growth *** results indicated that the quantitative changes in fatty acids,presented at lower amount,were relatively higher than dominant fatty *** were decreasing phenolic content in the developing seedlings,but overall,lowest level of total phenolic content can be attributed to the control(30.52 mg⋅100 g⋅Oil^(-1)).In contrast,the maximum peroxide value(2.58 meq⋅kg Oil^(-1))in the developing seedling was observed on the last day of the *** results showed that there was a significant correlation between saturated fatty acid,unsaturated fatty acid,and lipase ***,the correlation between lipase activity and polyunsaturated fatty acids was significantly higher than between lipase activity and monounsaturated fatty acids(R^(2)=90%and R^(2)=77%,respectively).Therefore,the lipolysis process acts selectively in milk thistle *** to the results,C12:0 exhibits a greater impact on the early seedling growth rather than on the germination process and is one of the determining factors in the transition from heterotroph to ***,it can be a marker for TAGs breakdown.

关键词： Fatty acid Lipase Milk thistle Lauric acid TAGs total polyphenol

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