Biochemical changes in two Aronia melanocarpa cultivars’ berries during the harvest season
Biochemical changes that undergo during the harvest season in 2020 (between 28 July and 11 September) were evaluated by a comparative study of two Aronia cultivars. The experiment was conducted at the Research Institute for Fruit Growing Pitesti, Arges County, Romania, on ‘Melrom’ and ‘Nero’ cultivars. Dry matter, total soluble content, pH, vitamin C, and biologically active components such as anthocyanins and phenolics variations were assessed from 28 July to 11 September 2020, for berries harvested every five days. ‘Melrom’ cultivar berries had significantly higher dry weight content, 251.43 g kg-1. ‘Nero’ showed a significantly higher vitamin C (1.87 g /kg-1 DW), total anthocyanins content (29.71 g cyanidin 3 – glucoside kg-1 DW), and juice pH (3.87). As harvest time main effect over the two cultivars taken together, dry weight, anthocyanins, total soluble content, and juice pH content increased significantly during the harvest season with 43.32%, 54.10%, 36.33%, and 17.98%, respectively, whereas significant losses of vitamin C, by 26.21%, and total phenolics compounds, by 27.90%, were recorded. Overall, early harvested fruits contained higher levels of moisture, vitamin C, and phenolics compounds, although the last crops provided less acidic fruits, with higher total soluble solids and anthocyanins content.
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