Antimicrobial Activity of Tunisian Quince (Cydonia oblonga Miller) Pulp and Peel Polyphenolic Extracts

Abstract

Quince (Cydonia oblonga Miller) fruit aqueous acetone extracts were evaluated. High-performance liquid chromatography-diode array detection and electrospray ionization-mass spectrometry were used for the identification and quantification of the phenolic compounds. The total phenolic content of the pulp and peel parts ranged from 37 to 47 and 105 to 157 mg/100 g of fresh weight, respectively. Chlorogenic acid (5-O-caffeoylquinic acid) was the most abundant phenolic compound in the pulp (37%), whereas rutin (quercetin 3-O-rutinoside) was the main one in the peel (36%). The radical scavenging potential of the extracts was determined and compared with that of synthetic antioxidants. The stronger properties corresponded to those obtained from peel material with a 70-80% inhibitory effect on DPPH radicals. The antimicrobial activity of the extracts against different microorganism strains was also investigated. Quince peel extract was the most active for inhibiting bacteria growth with minimum inhibitory and bactericide concentrations in the range of 102-5 x 103 microg polyphenol/mL. It seems that chlorogenic acid acts in synergism with other components of the extracts to exhibit their total antimicrobial activities.

Pomegranate and mint syrup addition to green tea beverage stabilized its polyphenolic content and biofunctional potentials during refrigerated storage

“…All samples were stored in the refrigerator (4± 1°C) during 15 days. Aqueous-acetone polyphenolic extracts were prepared at 0, 6 and 15 day of storage by mixing thoroughly 3 ml from each sample with 7 ml of cold acetone (−20°C) (Fattouch et al 2007). Following a centrifugation at 3500 rpm for 15 min at room temperature, the supernatant was collected and acetone was evaporated using a rotary evaporator (40°C) until reaching 3 ml of final volume.…”

Biochemical Characteristics, Antimicrobial and Mutagenic Activity in Organically and Conventionally Produced Malus domestica, Annurca

“…Since many years, phenolic compounds became the subject of anti-infective research, due to their antibacterial, antifungal and antiviral activity [28][29][30][31]. They can have an effect on growth and metabolism of bacteria, activating or inhibit- lytic uremic syndrome.…”

Drying method effects on the antioxidant activity of quince (Cydonia oblonga Miller) tea

“…Pomes of Quince, have hard fl esh of high fl avour, but very acid, and these are largely used for marmalade, liqueur, jelly and preserves [Alesiani et al 2010]. At present, quince fruit is recognized as an important dietary source of health promoting compounds, due to its antioxidant, antimicrobial and antiulcerative properties [Fattouch et al 2007, Hamauzu et al 2005, 2006, Silva et al 2004.…”

“…At present, quince fruit is recognized as an important dietary source of health promoting compounds, due to its antioxidant, antimicrobial and antiulcerative properties [Fattouch et al 2007, Fiorentino et al 2006, 2007, García-Alonso et al 2004, Hamauzu et al 2005, 2006, Silva et al 2004, Yildirim 2006, Wang et al 2006. Quince fruit (Cydonia oblonga Miller) is not appreciated fresh due to its pulp hardness, bitterness and astringency.…”