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Stilbenes and tyrosol as target compounds in the assessment of antioxidant and hypolipidemic activity of Vitis vinifera red wines from southern Brazil.

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The contents of stilbene monomers, cis-resveratrol, trans-resveratrol, cis-piceid, trans-piceid, and tyrosol, were quantified in Vitis vinifera red wines, cvs. Cabernet Franc, Merlot, Sangiovese, and Syrah, 2006 and 2007 vintages, from the São Joaquim region, a new grape-growing region at southern

Purine and pyrimidine dinucleoside polyphosphates differentially affect the phenylpropanoid pathway in Vitis vinifera L. cv. Monastrell suspension cultured cells.

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It is known that the concentration of dinucleoside polyphosphates (Np_nN's) in cells increases under stress and that adverse environmental factors induce biosynthesis of phenylpropanoids, which protect the plant against stress. Previously, we showed that purine Np_nN's such as

Diadenosine triphosphate is a novel factor which in combination with cyclodextrins synergistically enhances the biosynthesis of trans-resveratrol in Vitis vinifera cv. Monastrell suspension cultured cells.

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Dinucleoside polyphosphates are considered as signal molecules that may evoke response of plant cells to stress. Other compounds whose biological effects have been recognized are cyclodextrins. They are cyclic oligosaccharides that chemically resemble the alkyl-derived pectic oligosaccharides

Stilbene production in cell cultures of Vitis vinifera L. cvs Red Globe and Michele Palieri elicited by methyl jasmonate.

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Cell cultures obtained from Vitis vinifera cvs Michele Palieri and Red Globe were cultured in order to stimulate stilbene production. In the calli, stilbene production peaked at day 22 of culture for both cultivars; the main compound was trans-piceid, followed by cis-piceid. Methyl jasmonate, which

Pancreatic lipase inhibitory stilbenoids from the roots of Vitis vinifera.

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Bioassay-guided isolation of an aqueous methanolic extract of Vitis vinifera using pancreatic lipase inhibitory activity led to isolation of seven stilbenoids, wilsonol C (1), heyneanol A (2), ampelopsin A (3), pallidol A (4), cis-piceid (5), trans-piceid (6) and trans-resveratrol (7). The

Potential cancer-chemopreventive activities of wine stilbenoids and flavans extracted from grape (Vitis vinifera) cell cultures.

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Moderate consumption of wine is associated with a reduced risk of cancer. Grape plant cell cultures were used to purify 12 phenols: the stilbenoids trans-astringin, trans-piceid (2), trans-resveratroloside, trans-resveratrol, trans-piceatannol, cis-resveratroloside, cis-piceid, and cis-resveratrol;

Postharvest stilbenes and flavonoids enrichment of table grape cv Redglobe (Vitis vinifera L.) as affected by interactive UV-C exposure and storage conditions.

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Flavonoids and stilbenes are secondary metabolites produced in plants that can play an important health-promoting role. The biosynthesis of these compounds generally increases as a response to biotic or abiotic stress; therefore, in order to achieve as high phenolic accumulation as possible, the

A Focused Multiple Reaction Monitoring (MRM) Quantitative Method for Bioactive Grapevine Stilbenes by Ultra-High-Performance Liquid Chromatography Coupled to Triple-Quadrupole Mass Spectrometry (UHPLC-QqQ).

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Grapevine stilbenes are a family of polyphenols which derive from trans-resveratrol having antifungal and antimicrobial properties, thus being considered as phytoalexins. In addition to their diverse bioactive properties in animal models, they highlight a strong potential in human health maintenance

Determination of stilbene derivatives in Burgundy red wines by ultra-high-pressure liquid chromatography.

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The polyphenols, for example stilbenes and flavonoids, are an important family of compounds present in grapes and wines. Several studies have shown that stilbenes are antioxidants and cancer-preventing agents. For the first time, eight natural stilbenes (trans-resveratrol, trans-piceid, cis-piceid,

Effect of ochratoxin A-producing Aspergilli on stilbenic phytoalexin synthesis in grapes.

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Berries of Vitis vinifera L. cv. Barbera were infected, at veraison and during ripening, by a conidial suspension of A. japonicus, A. ochraceus, A. fumigatus and two isolates of A. carbonarius to control ochratoxin A production and stilbene induced synthesis. The experimental design provided also

Water deficit increases stilbene metabolism in Cabernet Sauvignon berries.

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The impact of water deficit on stilbene biosynthesis in wine grape (Vitis vinifera) berries was investigated. Water deficit increased the accumulation of trans-piceid (the glycosylated form of resveratrol) by 5-fold in Cabernet Sauvignon berries but not in Chardonnay. Similarly, water deficit

Antioxidant and anti-inflammatory properties of tomato fruits synthesizing different amounts of stilbenes.

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Resveratrol, a plant phenolic compound, is found in grapes and red wine, but is not widely distributed in other common food sources. The pathway for resveratrol biosynthesis is well characterized. Metabolic engineering of this compound has been achieved in tomato plants (Lycopersicon esculentum

Resistance to Plasmopara viticola in a grapevine segregating population is associated with stilbenoid accumulation and with specific host transcriptional responses.

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BACKGROUND Downy mildew, caused by the oomycete Plasmopara viticola, is a serious disease in Vitis vinifera, the most commonly cultivated grapevine species. Several wild Vitis species have instead been found to be resistant to this pathogen and have been used as a source to introgress resistance

The Study of Antioxidant Components in Grape Seeds

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The paper deals with the study of antioxidant properties of extracts from vine seeds (Vitis vinifera L.) using spectrometric and chromatographic techniques. Ten vine varieties (Cerason, Laurot, Kofranka, Gewürztraminer, Hibernal, Blaufrankisch, Zweigeltrebe, Erilon, Palava, and

The phytoalexin resveratrol regulates the initiation of hypersensitive cell death in Vitis cell.

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Resveratrol is a major phytoalexin produced by plants in response to various stresses and promotes disease resistance. The resistance of North American grapevine Vitis rupestris is correlated with a hypersensitive reaction (HR), while susceptible European Vitis vinifera cv. 'Pinot Noir' does not

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