Macrowine 2021
IVES 9 IVES Conference Series 9 Influence of the type of flavonol and the presence of mannoproteins in the copigmentation with malvidin 3-O-glucoside

Influence of the type of flavonol and the presence of mannoproteins in the copigmentation with malvidin 3-O-glucoside

Abstract

AIM: To study the copigmentation between different wine flavonols (myricetin, quercetin, kaempferol, isorhamnetin and syringetin 3-O-glucosides) and malvidin 3-O-glucoside to detect differences in the interactions due to the flavonol type. Considering the existing interactions of anthocyanins and flavonols in wines with mannoproteins1, copigmentation was also studied in the presence of 5 different mannoproteins.

METHODS: 36 model systems were built in wine-like solution in triplicate. One of them contained only the anthocyanin. 10 were anthocyanin-flavonol (AF) or anthocyanin-mannoprotein (AM) binary systems. 25 contained the anthocyanin, one type of flavonol and one type of mannoprotein (AFM). Concentrations used were 0.41mM for the anthocyanin and flavonol and 400 mg/L for the mannoprotein. UV-vis spectra were measured at days 1, 2, 5, 8 and 22, calculating then, CIELAB parameters and copigmentation indexes, such as CCI (% of colour due to copigmentation)2. HPLC-DAD-MSn analyses1 were performed at day 22 to study anthocyanin degradation and the possible and distinct formation of anthocyanin-derived pigments.

RESULTS: In AF binary systems, the occurrence of copigmentation was demonstrated from the CCI values (>23 in all model systems from day 1 to day 22). Copigmentation increased during the first 8 days and then tended to decrease until day 22. Isorhamnetin 3-O-glucoside appeared to be the best copigment (CCI 70) whereas kaempferol 3-O-glucoside caused the lowest CCI values. In AM binary systems, copigmentation was not observed and, for some mannoproteins, even an anticopigmentation effect was detected. In AFM ternary systems, the effect depended both on the flavonol and on the mannoprotein, pointing to different interactions probably related to structural differences. 

CONCLUSIONS

The magnitude of the copigmentation phenomenon between malvidin 3-O-glucoside and different flavonols depend on the structure of the flavonol and can be differently affected by the presence of different types of mannoproteins in the medium.

Publication date: September 14, 2021

Issue: Macrowine 2021

Type: Article

Authors

Cristina Alcalde Eon

Grupo de Investigación en Polifenoles, University of Salamanca, Salamanca, Spain,María de las Nieves FELIPE-JIMÉNEZ. Grupo de Investigación en Polifenoles, University of Salamanca, Salamanca, Spain Ignacio GARCÍA-ESTÉVEZ. Grupo de Investigación en Polifenoles, University of Salamanca, Salamanca, Spain María Teresa ESCRIBANO-BAILÓN. Grupo de Investigación en Polifenoles, University of Salamanca, Salamanca, Spain

Contact the author

Keywords

anthocyanins, flavonols, copigmentation, mannoproteins, colour stability

Citation

Related articles…

Application of DEXI PM Vigne sustainability tool to the assessment of alternative vineyard protection strategies

Implementing alternative grapevine systems that incorporate sustainable strategies and innovative farming practices is essential. However, we lack tools for measuring the impact of these new practices on the overall sustainability of vineyards. DEXi PM Vigne (Gary et al., 2015) is a tool developed for ex ante assessment of the sustainability of grapevine cropping systems, from the plot to the farm scale. In the present study, we focused on implementing new strategies of integrated crop protection management with limited pesticide use in vineyards.

Defoliation timing impacts berry secondary metabolites and sunburn damage

Sunburn is a physiological disorder that leads to yield and quality losses in a range of fruits such as grapes and apples. It affects the visual appearance and the composition of the fruit, leading to irreversible changes and ultimately, cell death in extreme situations.

Investigation of the effect of gelatine and egg albumin fining and cross-flow microfiltration on the phenolic composition of Pinotage red wine

Results indicated that cross-flow microfiltration removed similarly to fining treatments the most astringent tannins, but cross-flow microfiltration also removed up to 14 % more colour. RP-HPLC and spectrophotometric results showed that egg albumin is a softer fining treatment compared to gelatine and cross-flow microfiltration.

Effect of irrigation regime on carbon isotope ratio (δ13c) in different grapevines

In Castilla-La Mancha as other winegrowing regions, vineyards suffer the effects of the global climate warming. Severe spring and summer droughts are increasingly frequent, which concur with the phenological stages most susceptible to water and temperature stress. Under these conditions, irrigation use is required in order to ensure the vineyard growing sustainability. However water resources are increasingly limited, for this reason is required to choose cultivars displaying high water use efficiency.

Effets de l’application d’acide gibbérellique (GA3) sur la qualité de raisins et de vins produits en climat tropical au Nord-Est du Brésil

The honeydew moth Cryptoblabes gnidiella is the main problem for the wineries in the Northeast of the Brazil, because it attacks the bunch and reduces the quality of the grapes and the wines. In order to stretch out the bunch to facilitate the penetration of the insecticides, it was used gibberellic acid. Six treatments with different concentrations and different dates of application, and the control were compared.