Bioactive compounds contents, antioxidant and antimicrobial activities during ripening of Prunus persica L. varieties from the North West of Tunisia

• Published in: Food chemistry 2016-08, Vol.204, p.29-36
• Main Authors: Belhadj, Feten, Somrani, Imen, Aissaoui, Neyssene, Messaoud, Chokri, Boussaid, Mohamed, Marzouki, M.Nejib
• Format: Article
• Language: English
• Subjects: Anthocyanins - analysis; Anti-Infective Agents - analysis; Antimicrobial; Antioxidant; Antioxidants - analysis; Bacillus cereus - drug effects; Bacillus subtilis - drug effects; Candida albicans; Candida albicans - drug effects; Carotenoids - analysis; Enzymes inhibition; Escherichia coli - drug effects; Flavonoids - analysis; Fruit - chemistry; Klebsiella pneumoniae - drug effects; Listeria monocytogenes; Listeria monocytogenes - drug effects; Phytochemicals - analysis; Plant Extracts - analysis; Polyphenols - analysis; Prunus; Prunus persica; Prunus persica - chemistry; Staphylococcus aureus; Staphylococcus aureus - drug effects; Tannins - analysis; Tunisia
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2016.02.111

•Phytochemical composition depends on stage of maturation and variety.•Antioxidant power is proportional to concentrations and stages of maturation.•Antimicrobial potential is more pronounced during the first stage of maturation.•Enzymes inhibition assays give an idea about therapeutic applications. Bioactive molecules from fruits of four varieties of Prunus persica at different stages of ripening (green, small orange, red) were studied. For example, contents on polyphenols (20.36mg GAE/g FW) and flavonoids (0.764mg RE/g FW) were high and varied according variety. The antioxidant activity, using four different tests (DPPH radical scavenging activity, reducing power, β carotene bleaching system and TBARS assay) showed that the variety Chatos exhibited the highest antioxidant activity comparing with others varieties. The antibacterial activity of Prunus persica varieties studied seems to be more sensitive against Staphylococcus aureus and Listeria monocytogenes. The capacity of peach DMSO extracts to inhibit Candida albicans growth was more pronounced, especially, in the presence of Chatos DMSO extract. Enzymes inhibition gives results which correlate with polyphenols, flavonoids and condensed tannins contents, and so, confirm the fascinating bioactivity of this fruit.