Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 10, Issue 11, Pages 4941-4952Publisher
MDPI
DOI: 10.3390/ijms10114941
Keywords
peanut (Arachis hypogaea L.); groundnut; skin color; polyphenols; flavonoids proanthocyanidin; cultivars, biomarker
Funding
- Alabama Agricultural Experimental Station, Alabama Agricultural and Mechanical University
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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.
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