Constituents of flavonol O-glycosides and antioxidant activities of extracts from seeds, sprouts, and aerial parts of Polygonum tinctorium Lour
Autor: | Yu Hirabayashi, Kazushige Yokota, Tomoe Ishihara, Hideto Kimura, Mitsuo Jisaka, Shota Tokuyama-Nakai |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
0301 basic medicine
Pharmaceutical science Food technology Food science Analytical chemistry Food analysis Flavonoid Biology Polygonaceae Indigo Article 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine lcsh:Social sciences (General) lcsh:Science (General) chemistry.chemical_classification Multidisciplinary Traditional medicine fungi Glycoside food and beverages biology.organism_classification 030104 developmental biology Aglycone chemistry Polyphenol lcsh:H1-99 Kaempferol Quercetin 030217 neurology & neurosurgery lcsh:Q1-390 |
Zdroj: | Heliyon Heliyon, Vol 5, Iss 3, Pp e01317-(2019) |
ISSN: | 2405-8440 |
Popis: | Polygonum tinctorium Lour. (family Polygonaceae), known as indigo plant, has been useful as a medicinal or edible plant abundant in polyphenolic compounds. We have recently shown that flavonol O-glycosides with 3,5,4′-trihydroxy-6,7-methylenedioxyflavone (TMF) are predominant flavonoids in indigo leaves. However, no study has been performed regarding changes in the levels of flavonoid species during the germination and growth of indigo plant. Here, we attempted to determine the individual constituents of flavonol O-glycosides and the changes in their contents of the seeds, sprouts, and aerial parts. These results revealed that only the seeds predominantly contained flavonol O-(acetyl)-rhamnosides with quercetin or kaempferol as an aglycone. During the development of the sprouts and aerial parts, flavonol O-glycosides with TMF as an aglycone became mainly detectable and accounted for 79.4% and 74.9% of total flavonol O-glycosides from the extracts of aerial parts harvested in 2016 and 2017, respectively. Of the plant organs tested, the aerial parts exhibited the highest antioxidant activities concomitant with greatly increased levels of total polyphenols. Thus, we were able to conduct the identification and quantification of flavonol O-glycosides from the seeds, sprouts, and aerial parts of indigo plant and to evaluate antioxidant activities of their extracts. Taken together, our findings clearly provide the evidence that the aerial parts of indigo plant are a rich source of flavonol O-glycosides with TMF and exhibit much higher antioxidant activities, indicating the usefulness for the application to food and nutraceutical purposes. |
Databáze: | OpenAIRE |
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