Polyphenolic compounds and antioxidants of skin and berry grapes of Greek Vitis vinifera cultivars in relation to climate conditions

Biniari, Katerina; Xenaki, Melitini; Daskalakis, Ioannis; Rusjan, Dennis; Bouza, Despoina; Stavrakaki, Maritina

doi:10.1016/j.foodchem.2019.125518

Cited by 41 publications

(30 citation statements)

References 28 publications

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“…In this same study evaluating the crop of 2017, the skins revealed flavonoid contents ranging from 3.37 to 23.39 mg of catechin/g of skins, while the seeds showed 38.38 to 79.09 mg of catechin/g of seeds. In their results, Biniari et al (2020) also found a wide-ranging variation in the phenolic concentration and composition among the different cultivars. These observations showed to be true even for specific biotypes of a cultivar, possibly clones, such as the Liatiko cultivar biotypes which were included in the assay.…”

Section: G R Ape Re S Idue S a S A Source Of Phenolic Comp Oundsmentioning

confidence: 85%

“…In some grape varieties, the total phenolic content in the seeds is over 10 times higher than that found in the skins, according to Pantelić et al (2016) in Pinot Noir, Sauvignon Blanc, Chardonnay, Riesling, and Pinot Gris grapes. In a recent study, a total phenolic content in the seeds ranging from 19.84 to 47.19 mg equivalent to gallic acid/g of seeds was obtained from different parts of the grapes from 19 cultivars, including Merlot, Cabernet Sauvignon, and Cabernet Franc (Biniari et al, 2020).…”

Section: G R Ape Re S Idue S a S A Source Of Phenolic Comp Oundsmentioning

confidence: 99%

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New trends in the use of enzymes for the recovery of polyphenols in grape byproducts

et al. 2021

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Residues from wine and juice processing still contain about 70% of the phenolic compounds in grapes. These compounds are valued for having several bioactive properties that are explored in the pharmaceutical and food sectors. This paper aims to summarize the most recent advances in the use of enzymatic techniques for the recovery of bioactive compounds from GP for industrial application. For this, we analyzed scientific articles and patent applications from the last 20 years in the main indexed and patent databases. Among the most used enzymes in the recovery of bioactive compounds in wastes, cellulases, pectinases, tannases, glucoamylases, and proteases such as trypsin and chymotrypsin, are the most important. As a result, extracts are obtained with greater retrieval of compounds such as anthocyanins, gallic acid, catechins, epicatechins, and trans-resveratrol and the improvement of coloring, anti-inflammatory, antioxidant and vasoprotective properties. Although the use of enzymes for the recovery of phenolics is an old strategy, the number of studies focusing on the functional characteristics and industrial applicability of the extracts obtained has been recently growing. Practical applicationsPhenolic compounds have acted as anti-inflammatories, antioxidants, anticarcinogens, and antimicrobials, being additives or relevant ingredients for various products in the food and pharmaceutical industry. Although there are several techniques for extracting/recovering phenolics from grape pomace, there is still no agreement on which method is ideal. In recent years, several extractions methods have been applied in seeking optimized conditions to recover phenolics from grape residues. Among them, the use of enzymes has been gaining attention for being considered a green and promising technology. The present study aims to carry out a review that would bring a new perspective to the recovery of bioactive compounds from grape residues by enzymatic techniques, with a view to industrial purpose.

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Section: G R Ape Re S Idue S a S A Source Of Phenolic Comp Oundsmentioning

confidence: 85%

Section: G R Ape Re S Idue S a S A Source Of Phenolic Comp Oundsmentioning

confidence: 99%

New trends in the use of enzymes for the recovery of polyphenols in grape byproducts

et al. 2021

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“…Statistical analysis and correlations were obtained using JMP v. 11 statistical software (SAS Institute Inc., Cary, NC, USA). Principal Component analysis (PCA) was used in evaluating the measurements and their contribution to the variability of the biotypes studied (Biniari et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Comparative study of polyphenolic content and antioxidant capacity in fruits of Arbutus unedo, A. andrachne and their natural hybrid A.× andrachnoides

Bertsouklis

Daskalakis

Biniari

et al. 2021

Not Bot Horti Agrobo

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Fruits of the three Arbutus species native in the Eastern Mediterranean region, i.e. Arbutus andrachne, A. unedo and their natural hybrid A. × andrachnoides, collected from two different regions in Greece (Kalamos and Varympompi), were analysed comparatively in order to determine their phenolic profile and measure the antioxidant activity using two different single electron transfer-based assays, ferric reducing ability (FRAP) and 2,2-diphenylpicrylhydrazil radical scavenging capacity (DPPH). The pomological characteristics of the hybrid were similar to A. andrachne, while A. unedo had about 2.0-2.5 times larger fruits, with 20% more moisture being 175% heavier. All three species and their biotypes from the two areas had high phenolic content and antioxidant properties and were clearly pulled in different groups. Total flavanols scored a very strong correlation to antioxidant capacity. Highest total flavanols concentrations were found in A. andrachne fruits, while the hybrid had similar concentrations with A. unedo. In samples from Kalamos, concerning condensed tannins, total flavones, flavonols, phenolics and antioxidant capacity FRAP, as well as total anthocyanin and delphinidin 3-O-galactoside, the hybrid presented average values compared to the two parental species, while A. andrachne had the highest values. A strong correlation was found between ortho-diphenols and total soluble solids, as well as of total phenolics and flavonoids with total anthocyanins. The polyphenolic content and the antioxidant capacity varied in different biotypes. A. andrachne biotype from Kalamos showed the highest antioxidant capacity and anthocyanin potential. All A. unedo biotypes and A. × andrachnoides from Varympompi showed higher concentrations of ascorbic acid compared to the other biotypes.

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“…The flow rate stood at 0.5 mL min -1 . The linear gradient program used for the elution was the one described in Biniari et al (2020).…”

Section: Methodsmentioning

confidence: 99%

Variations in phenolic levels in grapevine buds at eco-dormancy after chemically-induced stress conditions

Daskalakis

Stavrakaki

Sotirakoglou

et al. 2021

Preprint

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Viticulture is one of the briskest economic activities worldwide. A major obstacle impeding such grape yields to satisfy the demand for increased production is the insufficient period of chilling temperatures which, due to climate change, is becoming briefer. The shorter period of cold leads to poor budbreak which, in turn, results in reduced yields. To combat this issue, agronomists have resorted to treatments with chemical regulators to meet the chilling requirement for bud dormancy release several fruit-bearing plants have, including grapevines.This study aimed at identifying and quantifying during eco-dormancy the individual polyphenolic compounds, and their possible variations, in the latent buds of the ‘Prime©’ and ‘Ralli’ table grape cultivars. The study induced chemical stress by means of four different solutions, at three discrete dates per year, for three consecutive years. Phenolics in the latent buds of the studied varieties were analyzed via HPLC. Their quantitative analysis showed variations both between the varieties and between the samples of those varieties collected after the eight treatments. The analysis indicated that the concentration of phenolics continued progressing during the annual growth cycle of the grapevine, with strong positive correlations being detected between catechin, epicatechin, chlorogenic acid, o-coumaric, piceid, procyanidins B1-B2, rutin, ε-viniferin. Luteolin registered a positive correlation with quercetin, resveratrol, o-coumaric, but not with the remaining polyphenols. The results confirmed that (a) the concentration of phenolics of the latent buds is affected by chemically-induced stress conditions, (b) depending on the date of application, significant changes appear in the variations of those phenolics.One sentence summaryChanges in the levels of polyphenol compounds of the grapevine’s latent buds hints, for the first time, how much stress the buds actually undergo under chemically-induced stress conditions

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Polyphenolic compounds and antioxidants of skin and berry grapes of Greek Vitis vinifera cultivars in relation to climate conditions

Cited by 41 publications

References 28 publications

New trends in the use of enzymes for the recovery of polyphenols in grape byproducts

New trends in the use of enzymes for the recovery of polyphenols in grape byproducts

Comparative study of polyphenolic content and antioxidant capacity in fruits of Arbutus unedo, A. andrachne and their natural hybrid A.× andrachnoides

Variations in phenolic levels in grapevine buds at eco-dormancy after chemically-induced stress conditions

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