Journal
SCIENTIA HORTICULTURAE
Volume 217, Issue -, Pages 189-196Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2017.01.042
Keywords
Mulberry; Maturity; Potyphenol; Anthocyanin; Phenolic acid; Antioxidant activity
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Mulberry fruits contain various substances known to have physiological activities in human health. The aim of this study was to investigate changes in physicochemical properties of mulberry fruits at seven maturity stages during ripening. As the fruits were ripening, lightness and yellowness decreased. Firmness rapidly decreased when the fruits fully matured, changing from 12.7 to 1.1 kg(f.) Soluble solids and pH tended to increase, while acidity, crude ash, dietary fiber, protein, minerals, and amino acids decreased during ripening. Free sugars of the fully matured fruits were ten times higher than those of the immature fruits. Content of y-aminobutyric acid tended to decrease, changing from 113.2 to 17.1 mg/100g during ripening. Free phenolic acids, quercetin-3-rutinoside, and 1-deoxynojirimycin decreased during ripening, especially over six times more chlorogenic acid in the immature fruits than in the fully matured fruits. Total phenolics, anthocyanins, and antioxidant activities increased during ripening. (C) 2017 Elsevier B.V. All rights reserved.
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