Evaluation of Flavonoid Contents and Antioxidant Capacity of the Aerial Parts of Common and Tartary Buckwheat Plants

Zielińska, Danuta; Turemko, Marcin; Kwiatkowski, J.; Zieliński, Henryk

doi:10.3390/molecules17089668

Cited by 100 publications

(86 citation statements)

References 28 publications

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“…Bamby). These results are higher than the results of Zielińska et al (2012a), who determined rutin in seeds of common and tartary buckwheat in the amount of 43 and 13 500 mg/kg DM, respectively. The analysis results show that there are highly significant differences in total polyphenol and rutin contents as well as in total antioxidant capacity between the studied buckwheat cultivars.…”

Section: Resultscontrasting

confidence: 73%

Cultivar influence on total polyphenol and rutin contents and total antioxidant capacity in buckwheat, amaranth, and quinoa seeds

Vollmannová¹,

Margitanová²,

Tóth³

et al. 2013

Czech J. Food Sci.

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Vollmannová A., Margitanová E., Tóth T., Timoracká M., Urminská D., Bojňanská T., Čičová I. (2013): Cultivar influence on total polyphenol and rutin contents and total antioxidant capacity in buckwheat, amaranth, and quinoa seeds. Czech J. Food Sci., 31: 589-590.Five cultivars from each of the three types of pseudocereals, i.e. buckwheat, amaranth, and quinoa, were studied for total polyphenol and rutin contents as well as total antioxidant capacity of seeds. A spectrophotometric method was used for the determination of total polyphenol content (using the Folin-Ciocalteau reagent) and total antioxidant capacity (using DPPH). Rutin content in pseudocereal seeds was determined by HPLC. The determined total polyphenol content in seeds of buckwheat, amaranth, and quinoa cultivars was in the intervals of 15 874-71 359 mg/kg DM, 1381-2870 mg/kg DM, and 459-1839 mg/kg DM, respectively. Rutin content in buckwheat, amaranth, and quinoa seeds was in the intervals of 8722-17 125 mg/kg DM, 310-508 mg/kg DM, and 170-368 mg/kg DM, respectively. The presented results confirmed a statistically significant influence of cultivar on total polyphenol and rutin contents as well as on total antioxidant capacity of pseudocereal seeds.

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Section: Resultscontrasting

confidence: 73%

Cultivar influence on total polyphenol and rutin contents and total antioxidant capacity in buckwheat, amaranth, and quinoa seeds

Vollmannová¹,

Margitanová²,

Tóth³

et al. 2013

Czech J. Food Sci.

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“…Li et al [30] showed that leaves of buckwheat contained rutin, but they did not identified quercetin. Also Zielińska et al [31] reported that leaves of common and tartary buckwheat were a good source of rutin. The results of Kreft et al [32] revealed that buckwheat beer and vinegar contained a negligible amount of this polyphenolic compound.…”

Section: Discussionmentioning

confidence: 99%

Identification of polyphenolic compounds and determination of antioxidant activity in extracts and infusions of buckwheat leaves

Dziadek

Kopeć

Piątkowska

et al. 2017

Eur Food Res Technol

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flavanols (catechin) and flavonols (rutin, quercetin) in the extracts and infusions, were found. Both extracts and infusions were the richest in ferulic acid. These studies indicate that the buckwheat leaves can be used for preparation of various types of tea and can also be introduced for consumers as the source of bioactive compounds.Keywords Buckwheat · Leaves · Extract · Infusion · Polyphenols · Antioxidant activity · Ferulic acid IntroductionBuckwheat (Fagopyrum esculentum Moench) is an annual plant, which is cultivated mainly for seeds. Buckwheat seeds can be recognized as an important food source, because they contain proteins with high biological value and balanced amino acid composition as well as bioactive compounds, mainly polyphenols [1,2]. Buckwheat seeds are used to produce groats, flour, pasta and bread [3,4]. In China, leaves and flowers of buckwheat are also used in traditional medicine. Food producers utilize these parts of plant for tea production, which decreases cholesterol and glucose level in the blood. These properties are due to the high content of phenolic compounds and dietary fibre in the leaves of buckwheat [5]. Dietary fibre protects from hyperglycaemia, hypercholesterolaemia, obesity and some types of cancer, especially colon cancer [6].Most studies focus on chemical composition of buckwheat seeds as well as healthy properties [7][8][9][10]. In the available literature there are little data concerning the other parts of buckwheat. Therefore, there is a need to examine other parts of buckwheat, such as leaves, in terms of their chemical composition, content of bioactive compounds and antioxidant activity. Thus, it is very important to examine Abstract The objective of this study was to determine the chemical composition in the dried leaves and the content of bioactive compounds, antioxidant activity as well as the identification of polyphenolic compounds not only in extracts but also in infusions prepared from leaves of selected strains of buckwheat. To the best of our knowledge, it is the first comprehensive and in-depth study, which focuses on identification and quantitative determination of individual polyphenolic compounds of buckwheat leaves. Furthermore, the aim of presented research is to analyse the new, unknown strains of buckwheat. A statistically significant effect of strain on the content of individual components was observed. The extracts contained more polyphenols and were characterized by higher antioxidant activity than infusions. Strains DW15 and DWO Karzel were characterized by one of the highest contents of polyphenols, dietary fibre, protein, ash and antioxidant activity. Phenolic acids (3,5-diCQA, ferulic acid, sinapinic acid, p-coumaric acid), flavanones (hesperidin), flavonoids (isorhamnetin) as well as these by-products because this knowledge can be used in the prevention and treatment of the chronic non-communicable diseases. It would be possible to create novel functional food products and to better use of the byproduct of buckwheat production. The objecti...

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“…Zielińska et al [2010] demonstrated a low contribution of rutin in the antioxidant potential of buckwheat seed products (fl our, hull, groats and sprouts) and concluded that the focus on rutin as the main antioxidant in buckwheat can be overestimated. For whole common buckwheat seeds, the contribution of rutin in the antioxidant capacity was estimated at 25% [Zielińska et al, 2012]. Because lipophilic antioxidants, e.g.…”

Section: Introductionmentioning

confidence: 99%

Fractionation of Buckwheat Seed Phenolics and Analysis of Their Antioxidant Activity

Karamać¹,

Biskup²,

Kulczyk³

2015

Pol. J. Food Nutr. Sci.

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Five fractions of phenolic compounds were obtained from the extract of common buckwheat seed (Fagopyrum esculentum Moench) using Sephadex LH-20 column chromatography with methanol as a mobile phase. The total phenolics content ranged from 19.8±1.5 (fraction I) to 164±2.2 mg (+)-catechin eq/g (fraction IV). The profi les of phenolic acids and fl avonoids in the fractions were analysed using RP-HPLC-DAD. The antioxidant activity was tested as ABTS •+ and DPPH • scavenging activity and capability to reduce the Fe(III)/2,4,6-Tris(2-pyridyl)-s-triazine complex to the ferrous form. Results were expressed as Trolox equivalent antioxidant capacity (TEAC), IC 50 and ferric reducing antioxidant power (FRAP) values, respectively. The highest antioxidant activity was noted for fraction IV that was predominated by fl avones. TEAC, IC 50 and FRAP values were: 1.47±0.01 mmol Trolox eq/g, 0.058±0.003 mg/assay and 2.18±0.05 mmol Fe(II)/g, respectively. Rutin constituted 77.7% of the compounds identifi ed in fraction III. The antiradical activity and reducing capability of this fraction were lower compared to fraction IV, but signifi cantly higher than in fractions I and II. The main phenolic compounds of fractions I and II were phenolic acids (caffeic, 5-O-caffeoylquinic and p-coumaric). The antioxidant activity of fraction V was similar to that of fraction III. Unauthenticated Download Date | 5/11/18 5:42 PM

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Evaluation of Flavonoid Contents and Antioxidant Capacity of the Aerial Parts of Common and Tartary Buckwheat Plants

Cited by 100 publications

References 28 publications

Cultivar influence on total polyphenol and rutin contents and total antioxidant capacity in buckwheat, amaranth, and quinoa seeds

Cultivar influence on total polyphenol and rutin contents and total antioxidant capacity in buckwheat, amaranth, and quinoa seeds

Identification of polyphenolic compounds and determination of antioxidant activity in extracts and infusions of buckwheat leaves

Fractionation of Buckwheat Seed Phenolics and Analysis of Their Antioxidant Activity

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