Cluster Sun Exposure and Quercetin in Pinot noir Grapes and Wine

Price, Steven F.; Breen, Patrick J.; Valladao, Marilin; Watson, Barney

doi:10.5344/ajev.1995.46.2.187

Cited by 346 publications

(20 citation statements)

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“…Delphinidin-3-Oarabinoside O-arabinoside accumulated a lot, while Procyanidin B1 and Procyanidin B2 were only detected in Q, indicating that Delphinidin-3-O-arabinoside is a typical representative of light-inducible anthocyanins. The effect of light on fruit has been reported in previous studies, such as shading reduced the accumulation of total anthocyanins and 3′-hydroxylated anthocyanins in 'Nebbiolo' grape fruit, but increased the 3′, 5′-The concentration of hydroxylated anthocyanins [39]. Likewise, the content of 3, 4′, 5′-hydroxylated anthocyanins was reduced in 'Yan-73' under dark conditions [40].…”

Section: Light-induced Anthocyanin Components Can Be Divided Into Two...supporting

confidence: 61%

Metabolome and transcriptome profiling unveil the mechanisms of light-induced anthocyanin synthesis in rabbiteye blueberry (vaccinium ashei: Reade)

et al. 2022

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Background Blueberry is one of the most important fruit crops worldwide. Anthocyanin is an important secondary metabolites that affects the appearance and nutritive quality of blueberries. However, few studies have focused on the molecular mechanism underlying anthocyanin accumulation induced by light intensity in blueberries. Results The metabolic analysis revealed that there were 134 significantly changed metabolites in the natural light compared to the control, and flavone, flavonol, and anthocyanins were the most significantly increased. Transcriptome analysis found 6 candidate genes for the anthocyanin synthesis pathway. Quantitative reverse transcription PCR (qRT-PCR) results confirmed changes in the expression levels of genes encoding metabolites involved in the flavonoid synthesis pathways. The flavonoid metabolic flux in the light intensity-treatment increased the accumulation of delphinidin-3-O-arabinoside compared to under the shading-treatment. Furthermore, we performed qRT-PCR analysis of anthocyanin biosynthesis genes and predicted that the gene of VcF3’5’H4 may be a candidate gene for anthocyanin accumulation and is highly expressed in light intensity-treated fruit. Through the co-expression analysis of transcription factors and anthocyanin synthesis pathway genes, we found that the VcbHLH004 gene may regulate VcF3’5’H4, and then we transformed VcbHLH004 heterologously into tomato to verify its function. Conclusion These results provide novel insights into light intensity regulation of blueberry anthocyanin accumulation and represent a valuable data set to guide future functional studies and blueberry breeding.

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Section: Light-induced Anthocyanin Components Can Be Divided Into Two...supporting

confidence: 61%

Metabolome and transcriptome profiling unveil the mechanisms of light-induced anthocyanin synthesis in rabbiteye blueberry (vaccinium ashei: Reade)

et al. 2022

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“…Flavonols are phenolic compounds found in grape skin cells and sunlight exposure influences their biosynthesis. They also have an important role in winemaking decisions because they participate in the wine color stability through their co‐pigmentation with anthocyanins 14 . Finally, grape‐derived volatile compounds are present in wines and their accumulation during ripening is variable and dependent on the cultivar and viticultural practices 15‐17 .…”

Section: Introductionmentioning

confidence: 99%

Longer cluster hanging time decreases the impact of grapevine red blotch disease in Vitis vinifera L. Merlot across two seasons

Girardello,

Rumbaugh,

Perry

et al. 2023

J Sci Food Agric

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BACKGROUNDGrapevine red blotch virus (GRBV) is a recently discovered virus and a major concern for the wine industry. Prior research indicated that GRBV delays grape ripening by reducing °Brix and anthocyanin concentrations in grapes from infected vines, resulting in higher ethanol concentrations in wines made from healthy fruit compared to diseased vines, which impacted sensory properties. In this study, infected fruit (Vitis vinifera L. Merlot) was sequentially harvested (in 2016 and 2017) and chaptalized (in 2017) to ameliorate the impact of GRBV on grape and final wine composition.RESULTSChemical parameters including phenolic and volatile profiles of grapes and their subsequent wines were measured. Sensory properties were determined by descriptive analyses. Results demonstrated that GRBV decreased sugar accumulation and anthocyanin synthesis in grapes. Wines from GRBV grapes harvested at later ripening stage produced wines that were more similar chemically and sensorially to wines made from healthy fruit than to wines made from GRBV fruit harvested earlier.CONCLUSIONThe longer hang time of GRBV grapes is a potential strategy to mitigate the impacts of GRBV. However, chaptalization of diseased fruit must was inefficient at increasing similarities with wines made from healthy fruit.This article is protected by copyright. All rights reserved.

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“…In general, LR and cluster exposure is more convenient in cool climates in comparison to warm grape growing regions (Vasconcelos & Castagnoli, 2000). Although LR may lead to better soluble solids accumulation and increase total anthocyanins (TA) and total polyphenols (TP) content (Nicolosi et al, 2012;Vilanova et al, 2012), excessive LR in warm climates can decrease anthocyanin concentration, and therewith the berry colour (Price et al, 1995). Early LR treatments resulted in an increase in total phenols, TA, and boosted antioxidant activity in Cabernet Sauvignon red wine (Drenjančevi c et al, 2017), but reduced the concentration of some esters (Drenjančevi c et al, 2018).…”

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Impact of leaf removal as a source of stresses on grapevine yields, chemical characteristics, and anthocyanin content in the grapevine variety Babica

Drenjančević

Kujundžić

Jukić

et al. 2023

Annals of Applied Biology

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Leaf removal (LR) treatments improve the photosynthetic capacity of the remaining leaves and induce flavonoid synthesis as a stress response in the common grapevine (Vitis vinifera L.). However, excessive exposure of grape berries to UV-B radiation as a result of cultural practices in the Mediterranean climate may have negative effects on berry composition. This 2-year study determined the effects of defoliation on the autochthonous red grape variety 'Babica' in a Mediterranean climate (wine-growing region Dalmatia, Croatia). Six leaves were removed before flowering (FLR) and at the end of véraison (the onset of grape ripening; VerLR) and were compared to the untreated control. Yield parameters, sugar content, grape must pH, total polyphenols (TP), total anthocyanin (TA) content, and individual anthocyanin compounds were measured in grape skin extracts and wines. However, the greater mean daily temperature during the vegetation period and lesser rainfall before harvest in 2018 increased yield per vine, average cluster weights, density, and total acidity, compared to 2017. Both defoliation treatments significantly reduced TP in grape extracts, but these differences were not observed in wine. Compared to the control (NLR), VerLR treatment significantly reduced TA in grape skin extracts and wine. Significantly lesser TP concentrations, in grape skin extracts and wine, as well as TA were noticed during the 2017 season. VerLR treatment reduced the concentration of nine individual anthocyanins compared to the control in grape skin extracts, while this effect was not observed in wine. Season year was a statistically significant source of variability of the individual anthocyanin contents in wine. Under specific environmental conditions LR can decrease polyphenols, especially anthocyanins, and negatively impact grape and wine quality.

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Cluster Sun Exposure and Quercetin in Pinot noir Grapes and Wine

Cited by 346 publications

References 0 publications

Metabolome and transcriptome profiling unveil the mechanisms of light-induced anthocyanin synthesis in rabbiteye blueberry (vaccinium ashei: Reade)

Metabolome and transcriptome profiling unveil the mechanisms of light-induced anthocyanin synthesis in rabbiteye blueberry (vaccinium ashei: Reade)

Longer cluster hanging time decreases the impact of grapevine red blotch disease in Vitis vinifera L. Merlot across two seasons

Impact of leaf removal as a source of stresses on grapevine yields, chemical characteristics, and anthocyanin content in the grapevine variety Babica

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