This study systematically evaluated the color-enhancing effects of different co-pigmented molecules (amino acids, peptides, flavonoids and phenolic acids) with cranberry anthocyanins under different environmental conditions (light, dark, high temperature and ascorbic acid) and their potential mechanisms by various means, such as degradation kinetics, color stability, H NMR spectroscopy, and structural simulation analyses. The results showed that the introduction of co-pigments induced a strong color-enhancing effect and bathochromic shift, inhibited the degradation of anthocyanins (9.34 % ∼ 45.00 %), and prolonged the half-life of anthocyanins (14.33 % ∼ 104.56 %). Among them, catechin, ferulic acid and tryptophan, by virtue of their large molecular planes, flexible side chains and abundant substituents, altered the core structure of anthocyanins and the electron cloud density of H atoms on the acylated molecules, which significantly enhanced their stability upon binding to anthocyanins. In addition, molecular docking simulations revealed an interaction mode between co-pigments and anthocyanins dominated by hydrogen bonding and π-π stacking interactions.
This study systematically evaluated the color-enhancing effects of different co-pigmented molecules (amino acids, peptides, flavonoids and phenolic acids) with cranberry anthocyanins under different environmental conditions (light, dark, high temperature and ascorbic acid) and their potential mechanisms by various means, such as degradation kinetics, color stability, H NMR spectroscopy, and structural simulation analyses. The results showed that the introduction of co-pigments induced a strong color-enhancing effect and bathochromic shift, inhibited the degradation of anthocyanins (9.34 % ∼ 45.
3-Deoxyanthocyanidins, a rare class of anthocyanins, have gained increasing popularity due to their notable stability and bioactive properties. The enhanced stability of these colorants is attributed to the absence of a hydroxyl group at the C-3 position. This absence leads to unique response mechanisms to environmental factors, such as pH, temperature, and light exposure.
* Results showed that these co-pigments reduce the degradation of anthocyanins, leading to improved color and antioxidant properties, with quercetin and others being particularly effective.
* Analysis techniques revealed that these co-pigments form non-covalent complexes with anthocyanins, providing protection against degradation and suggesting their potential to enhance color quality during juice processing.
In this research, the co-pigmentation reactions between black cherry plum ( Ehrh. cv. Pissardii Nigra) anthocyanins and caffeic, gallic, 4-hydroxybenzoic, malic, and tannic acids with different concentrations (0, 120, 240, 480, and 960 mg L) at various temperatures (20, 40, 60, 80, and 100°C) were investigated at pH 3.
Sunlight boosts anthocyanin synthesis/accumulation in sunny pericarp of litchi fruit, directly leading to uneven pigmentation. Distribution discrepancy of mineral element aggravates uneven coloration by modulating synthesis/accumulation of anthocyanin and sugar. Uneven coloration, characterized by red pericarp on sunny side and green pericarp on shady side, impacts fruit quality of 'Feizixiao' (cv.
