polyphenolic content, antioxidant and antimicrobial activities of lycium barbarum l. and lycium chinense mill. leaves
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ID: 200089
2014
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Abstract
This study was performed to evaluate the in vitro antioxidant and antimicrobial activities and the polyphenolic content of Lycium barbarum L. and L. chinense Mill. leaves. The different leave extracts contain important amounts of flavonoids (43.73 ± 1.43 and 61.65 ± 0.95 mg/g, respectively) and showed relevant antioxidant activity, as witnessed by the quoted methods. Qualitative and quantitative analyses of target phenolic compounds were achieved using a HPLC-UV-MS method. Rutin was the dominant flavonoid in both analysed species, the highest amount being registered for L. chinense. An important amount of chlorogenic acid was determined in L. chinense and L. barbarum extracts, being more than twice as high in L. chinense than in L. barbarum. Gentisic and caffeic acids were identified only in L. barbarum, whereas kaempferol was only detected in L. chinense. The antioxidant activity was evaluated by DPPH, TEAC, hemoglobin ascorbate peroxidase activity inhibition (HAPX) and inhibition of lipid peroxidation catalyzed by cytochrome c assays revealing a better antioxidant activity for the L. chinense extract. Results obtained in the antimicrobial tests revealed that L. chinense extract was more active than L. barbarum against both Gram-positive and Gram-negative bacterial strains. The results suggest that these species are valuable sources of flavonoids with relevant antioxidant and antimicrobial activities.
| Reference Key |
mocan2014moleculespolyphenolic
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| Authors | ;Andrei Mocan;Laurian Vlase;Dan Cristian Vodnar;Cristina Bischin;Daniela Hanganu;Ana-Maria Gheldiu;Radu Oprean;Radu Silaghi-Dumitrescu;Gianina Crișan |
| Journal | Journal of ethnopharmacology |
| Year | 2014 |
| DOI |
10.3390/molecules190710056
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| URL | |
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