| Abstract Detail
Breeding and Genetics Stushnoff, Cecil [1], Külen, Oktay [1], Wilson, Paula E [2], Holm, DG [3]. Some Antioxidant Properties of Purple Potato Cultivars and Selections. THE primary objective of this study was to characterize some antioxidant properties of purple pigmented potato genotypes in the Colorado breeding program. Of the 90 plus cultivars and selections examined yearly since 2000, pigmented entries consistently emerged as the highest in total phenolics and ABTS radical scavenging capacity. Antioxidant properties of uncooked samples fluctuated from year to year, but the same selections and cultivars consistently emerged among the highest over the five-year period. While antioxidant properties of the pigmented genotypes decreased in microwaved, boiled, and baked tubers, they remained higher than non-pigmented genotypes. Total phenolics content as determined by a Folin-Ciocalteau assay, increased an average of 24 % (14 to 42% range) in nine color-pigmented potato cultivars and selections after 3 months storage at 7-8 ºC. LC/MS analyses revealed that eight anthocyanin compounds contributed to the purple skin and flesh color and antioxidant properties of ‘Purple Majesty’. Chlorogenic acid levels were also higher in ‘Purple Majesty’ compared to non-pigmented cultivars. Purple segments extracted from the same tuber that expressed chimeral zones for both purple and white tissues contained up to 5 times more total phenolics than the non-pigmented segments.
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1 - Colorado State University, Department of Horticulture & Landscape Architecture,, Fort Collins, CO, 80523, USA
2 - New Zealand Institute for Crop & Food Research Ltd, Private Bag 4704, Christchurch, , New Zealand
3 - Colorado State University, Horticulture and Landscape Architecture, San Luis Valley Research Center, 0249 East Road 9 North, Center, CO, 81125, USA
Keywords:
antioxidant
ABTS radical scavenging
Folin-Ciocalteau assay
Chlorogenic acid
Total Phenolics.
Session: Poster-48
Location: Ballroom CD/Monona Terrace
Date: Tuesday, July 25th, 2006
Time: 8:00 AM
Abstract ID:366 |
