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Variation for antioxidant activity and antioxidants in a subset of AVRDC—the World Vegetable Center Capsicum core collection

Published online by Cambridge University Press:  12 February 2007

Peter M. Hanson*
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
Ray-yu Yang
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
Susan Lin
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
Samson C. S. Tsou
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
Tung-Ching Lee
Affiliation:
Department of Food Science and the Center for Advanced Food Technology, Rutgers, State University of New Jersey, 65 Dudley Road, New Brunswick, NJ 08901-8520, USA
Jane Wu
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
Jin Shieh
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
Paul Gniffke
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
Dolores Ledesma
Affiliation:
AVRDC—the World Vegetable Center, Box 42 Shanhua, Tainan, 741, Taiwan
*
*Corresponding author: E-mail: [email protected]

Abstract

Pepper (Capsicum sp.) is important in human diets in many parts of the world and a major source of several antioxidants, including carotenoids, ascorbic acid, tocopherols and phenolics. More information on genetic diversity within Capsicum for antioxidant (AO) content and antioxidant activity (AOA) could contribute to improved human health. We evaluated 46 Capsicum accessions from AVRDC—the World Vegetable Center Capsicum core collection for content of nine AO (five carotenoids, ascorbic acid, tocopherols α and γ, and total phenolics) and two AOA assays for 2 years in south Taiwan. Ample genetic diversity exists within C. annuum to increase AO content. Based on dry weight values, non-pungent C. annuum entries as a group were significantly greater than pungent entries for contents of β-cryptoxanthin (36%), ascorbic acid (65%), total phenolics (36%) and α-tocopherol (11%). Group means of the brown-fruited entries exceeded the means of red-fruited entries for capsanthin (34%), zeaxanthin (37%), lutein (36%), β-cryptoxanthin (71%), β-carotene (82%), ascorbic acid (19%) and α-tocopherol (40%). Red-fruited C. annuum entries ‘Verdano Poblano’ and ‘Guajillo Ancho’ from Mexico ranked among the entries highest for all carotenoids, ascorbic acid and α-tocopherol. The inhibition of lipid peroxidation (ILP) assay could be adopted for AOA characterization or selection because of high variation among entries and consistent entry performance over years. ILP was positively correlated with phenolics (r=0.72**) and ascorbic acid (r=0.58**) contents. Significant positive correlations were detected between most carotenoids as well as a significant positive correlation between ascorbic acid and total phenolics contents (r=0.78**).

Type
Research Article
Copyright
Copyright © NIAB 2004

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