Nitrogen and potassium fertilization effects on anthocyanin content and color of Tempranillo grapes. Home Industry Info Research Summaries Nitrogen and potassium fertilization effects on anthocyanin content and color of Tempranillo grapes. Canopy Management A review of pyrazines in grapes and wine. Berry temperature and solar radiation alter anthocyanin populations in Merlot. Canopy management for fruitfulness.
Effects of Forchlorfenuron and Abscisic Acid on the Quality of ‘Flame Seedless’ Grapes
PhD: Anthocyanin profile of the Macedonian red wines
Mizuno, K. Hirano , G. Berry skin coloration, the content and composition of anthocyanin and anthocyanic vacuolar inclusion AVI development were investigated in two black cultivars, Cabernet Sauvignon Vitis vinifera and Pione V. The two black cultivars had high contents of malvidin, while the major anthocyanidin of Red Port was cyanidin and delphinidin. This difference of anthocyanidin composition was responsible for the red color of Red Port. Whereas the anthocyanidin composition of the two black cultivars showed little difference, the percentage of acylated anthocyanins was markedly higher in Pione than in Cabernet Sauvignon.
Macedonian Journal of Chemistry and Chemical Engineering
The variation between grapes in terms of the incidence and levels of copigmentation cofactors, and the color due to copigmentation has been studied. The levels of copigmentation in several hundred wines ranging from California and dozens of Italian wines from Marche and Tuscany have been measured and correlated with analytical measures of individual components. Prediction functions for the color due to copigmentation, based solely on anthocyanin and phenolic composition have been developed and tested successfully. Preliminary studies of the formation of polymeric pigment, associated with the decline of copigmented color have been completed. Alternative rapid spectroscopic methods such as NIR and FTIR in the MIR region have been applied to the quantification of the color due to copigmentation, free anthocyanins and polymeric pigment.
Food plants rich in anthocyanins include the blueberry, raspberry, black rice , and black soybean, among many others that are red, blue, purple, or black. Some of the colors of autumn leaves are derived from anthocyanins. Anthocyanins belong to a parent class of molecules called flavonoids synthesized via the phenylpropanoid pathway.
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