title: Peanut skin color: a biomarker for total polyphenolic content and antioxidative capacities of peanut cultivars.
abstract: Attempts to establish a relationship between peanut skin color (PSC) and total flavonoid (TF) content have produced inconclusive results. This study investigated the potential of PSC as a biomarker for polyphenol content and antioxidant capacity. Peanut cultivars were objectively evaluated for their skin color, total phenolic (TP), flavonoid (TF), proanthocyanidin (TPC) contents and antioxidant capacities (AC). Their relationship was determined by Pearson's correlation analyses. TP had stronger correlations with CIE a*, hue angle and AC (r(2) = 0.77, 0.82 and 0.80, respectively) compared to TF. Therefore, hue angle of peanut skin may be used as a biomarker for TP content rather than TF.
authors.affiliation: Department of Food and Animal Sciences, Alabama A&M University, P O Box 1628, Normal, AL 35762, USA.
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Chukwumah
authors.affiliation: Department of Food and Animal Sciences, Alabama A&M University, P O Box 1628, Normal, AL 35762, USA.
authors.forename: Lloyd T
authors.initials: LT
authors.lastname: Walker
authors.affiliation: Department of Food and Animal Sciences, Alabama A&M University, P O Box 1628, Normal, AL 35762, USA.
authors.forename: Martha
authors.initials: M
authors.lastname: Verghese
mesh_terms: D000975:Antioxidants / Q000032:analysis* / Q000737:chemistry; D010367:Arachis / Q000737:chemistry* / Q000378:metabolism; D005419:Flavonoids / Q000032:analysis / Q000737:chemistry; D010858:Pigmentation / Q000502:physiology*; D010936:Plant Extracts / Q000737:chemistry*; D059808:Polyphenols / Q000032:analysis* / Q000737:chemistry; D044945:Proanthocyanidins / Q000032:analysis / Q000737:chemistry
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D010936:Plant Extracts; D059808:Polyphenols; D044945:Proanthocyanidins; C013221:proanthocyanidin