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Phytochemical profiles and antioxidant capacity of improved cowpea varieties and landraces grown in Ethiopia

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Abstract
The phytochemical profiles and antioxidant capacities of 14 cowpea varieties (7 improved and 7 landraces) grown in Ethiopia were studied. The total phenolic, flavonoids, and monomeric anthocyanin contents (mg/100 g flour dry matter basis, db) ranged from 1210 to 1610 gallic acid equivalents, 250 to 1110 catechin equivalents and 3 to 7 cyanidin-3-glucoside equivalents, respectively. The antioxidant capacity measured using the 2,2diphenyl-1-picrylhydrazyl radical scavenging activity (DPPH), 2,2'-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) assays ranged from 26 to 92 and 89-125 mu mol Trolox equivalent (TE)/g, and 62-90 mu mol Fe2+/g db, respectively. p-Coumaric acid followed by sinapic acid predominated in the soluble fractions while salicylic acid followed by rosmarinic acid predominated in the bound fractions. The principal component analysis showed that most landrace cowpea grains showed higher total phenolic contents and antioxidant capacities than the improved grain varieties. The results suggested that landraces should be given due attention in future planning of cowpea breeding strategies.
Keywords
Food Science, Biochemistry, Anthocyanins, Antioxidant capacities, Cowpea, Flavonoids, Phenolic acids, Vigna unguiculata, VIGNA-UNGUICULATA, PHENOLIC COMPOSITION, BOUND PHENOLICS, ACIDS, ANTHOCYANINS, POLYPHENOLS, MECHANISMS, EXTRACTION, ALKALINE, LEGUMES

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MLA
Teka, Tilahun, et al. “Phytochemical Profiles and Antioxidant Capacity of Improved Cowpea Varieties and Landraces Grown in Ethiopia.” FOOD BIOSCIENCE, vol. 37, 2020, doi:10.1016/j.fbio.2020.100732.
APA
Teka, T., Retta, N., Bultosa, G., Udenigwe, C., Abraha, H. S., & Raes, K. (2020). Phytochemical profiles and antioxidant capacity of improved cowpea varieties and landraces grown in Ethiopia. FOOD BIOSCIENCE, 37. https://doi.org/10.1016/j.fbio.2020.100732
Chicago author-date
Teka, Tilahun, Negussie Retta, Geremew Bultosa, Chibuike Udenigwe, Habtu Shumoy Abraha, and Katleen Raes. 2020. “Phytochemical Profiles and Antioxidant Capacity of Improved Cowpea Varieties and Landraces Grown in Ethiopia.” FOOD BIOSCIENCE 37. https://doi.org/10.1016/j.fbio.2020.100732.
Chicago author-date (all authors)
Teka, Tilahun, Negussie Retta, Geremew Bultosa, Chibuike Udenigwe, Habtu Shumoy Abraha, and Katleen Raes. 2020. “Phytochemical Profiles and Antioxidant Capacity of Improved Cowpea Varieties and Landraces Grown in Ethiopia.” FOOD BIOSCIENCE 37. doi:10.1016/j.fbio.2020.100732.
Vancouver
1.
Teka T, Retta N, Bultosa G, Udenigwe C, Abraha HS, Raes K. Phytochemical profiles and antioxidant capacity of improved cowpea varieties and landraces grown in Ethiopia. FOOD BIOSCIENCE. 2020;37.
IEEE
[1]
T. Teka, N. Retta, G. Bultosa, C. Udenigwe, H. S. Abraha, and K. Raes, “Phytochemical profiles and antioxidant capacity of improved cowpea varieties and landraces grown in Ethiopia,” FOOD BIOSCIENCE, vol. 37, 2020.
@article{8678569,
  abstract     = {{The phytochemical profiles and antioxidant capacities of 14 cowpea varieties (7 improved and 7 landraces) grown in Ethiopia were studied. The total phenolic, flavonoids, and monomeric anthocyanin contents (mg/100 g flour dry matter basis, db) ranged from 1210 to 1610 gallic acid equivalents, 250 to 1110 catechin equivalents and 3 to 7 cyanidin-3-glucoside equivalents, respectively. The antioxidant capacity measured using the 2,2diphenyl-1-picrylhydrazyl radical scavenging activity (DPPH), 2,2'-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) assays ranged from 26 to 92 and 89-125 mu mol Trolox equivalent (TE)/g, and 62-90 mu mol Fe2+/g db, respectively. p-Coumaric acid followed by sinapic acid predominated in the soluble fractions while salicylic acid followed by rosmarinic acid predominated in the bound fractions. The principal component analysis showed that most landrace cowpea grains showed higher total phenolic contents and antioxidant capacities than the improved grain varieties. The results suggested that landraces should be given due attention in future planning of cowpea breeding strategies.}},
  articleno    = {{100732}},
  author       = {{Teka, Tilahun and Retta, Negussie and Bultosa, Geremew and Udenigwe, Chibuike and Abraha, Habtu Shumoy and Raes, Katleen}},
  issn         = {{2212-4292}},
  journal      = {{FOOD BIOSCIENCE}},
  keywords     = {{Food Science,Biochemistry,Anthocyanins,Antioxidant capacities,Cowpea,Flavonoids,Phenolic acids,Vigna unguiculata,VIGNA-UNGUICULATA,PHENOLIC COMPOSITION,BOUND PHENOLICS,ACIDS,ANTHOCYANINS,POLYPHENOLS,MECHANISMS,EXTRACTION,ALKALINE,LEGUMES}},
  language     = {{eng}},
  pages        = {{10}},
  title        = {{Phytochemical profiles and antioxidant capacity of improved cowpea varieties and landraces grown in Ethiopia}},
  url          = {{http://dx.doi.org/10.1016/j.fbio.2020.100732}},
  volume       = {{37}},
  year         = {{2020}},
}

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