Abstract Detail

Horticulture

Abeywickrama, Gihan [1], Debnath, Samir C. [2], Fereidoon, Shahidi [3].

Phenolic compounds of cranberry genotypes and their antioxidant capacity and bioactivities.

Canada Cranberry species are a rich source of natural antioxidants with potential health benefits linked to the prevention of certain chronic and degenerative diseases. This study compared the antioxidant activity of phenolic constituents of five different cranberry genotypes (pilgrim, wild clone NL2, wild clone NL3, wild clone PEI, wild clone NL1) and a market sample. Phenolic constituents were separated into free, esterified and bound fractions; the content of each fraction and the total phenolic content (TPC) as well as that of their flavonoids (FC) evaluated. The antioxidant efficacy was assessed using trolox equivalent antioxidant capacity (TEAC), oxygen radical absorbance capacity (ORAC), DPPH radical scavenging capacity (DRSC) and reducing power (RP) as well as metal chelation assays. Among cranberry varieties, pilgrim genotype showed the highest phenolic (30.02 mg of gallic acid equivalents (GAE)/g dried fruit weight) and flavonoid (19.94 mg of catechin equivalents (CE)/g of dried fruit weight) contents. The phenolic compounds in cranberry were predominantly present in the esterified and free forms, as exemplified in the pilgrim and wild clone NL2 for which HPLC-MS analysis was performed to identify the individual components. This study has clearly demonstrated that, in addition to the control Pilgrim, wild clone NL2 and NL3 may serve as promising sources of natural antioxidants for the further development.

1 - Memorial University of Newfoundland, Department of Biology , St. John’s, NL, A1B3X9, Canada
2 - Agriculture and Agri-Food Canada, Atlantic Cool Climate Crop Research Centre, 308 Brookfield Road, Bldg 25, St. John's, NL, A1E 0B2, Canada
3 - Memorial University of Newfoundland, Department of Biochemistry, St. John’s, NL, A1B3X9, Canada

Keywords:
Cranberry
Antioxidant capacity
Bioactivities
Free, esterified and bound fractions.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PHO007
Abstract ID:1052
Candidate for Awards:Ian and Syvia Taylor Award,2015 Graduate Student Best Poster Presentation Award,2015 Macoun-Hill Graduate Student Travel Award