Influences of Shading on Ascorbic Acid Biosynthesis of Blackcurrant (Ribes nigrum L.)

Cultivation conditions may greatly affect fruit quality, especially in the accumulation of functional metabolites. Blackcurrant fruits (Ribes nigrum L.) have high ascorbic acid (AsA) concentrations. The purpose current study was to investigate influence different shading treatments (full sunlight, and 40% 60% sunlight) on fruits’ maturity, levels firmness, soluble solid, AsA, enzyme activity involved AsA biosynthesis recycling two blackcurrant nigrum) cultivars, ‘Heifeng’ ‘Adelinia’. Shading sunlight delayed ripening increased firmness both ‘Adelinia’ ‘Heifeng’. Soluble solids were markedly reduced by compared with Compared full content significantly decreased ripe under treatments. Additionally, during development process treatment, which associated enzymes monodehydroascorbate reductase (MDHAR), dehydroascorbate (DHAR), glutathione oxidoreductase (GR), ascorbate peroxidase (APX), L-galactose dehydrogenase (GalDH) pathway AsA. correlation analysis results showed that MDHAR, DHAR, GR, APX, GalDH positively correlated concentrations treatment fruits, suggesting affected cultivars similar mechanisms deal shading. Our not only provide a better understanding regulation mechanism shading, but also theoretical basis for taking effective cultivation measures aimed at improvement fruits.