Abstract:
Phenolic compounds are associated with cell walls in cereals and legumes. Phenolic
composition and bioactive properties of cell walls and whole grain of
sorghum, teff and cowpea were determined.Whole grain extracts had higher total
phenolic content (630–2,782 mg CE/g) and total flavonoid content (0.033–
0.17 mg CE/g) than cell wall extracts (261–1,005 and 0.011–0.047 mg CE/g,
respectively). Similar trends were observed for 2,2’-azinobis (3-ethylbenzothiazoline-
6 sulfonic acid) radical scavenging (whole grain: 30–87; cell wall:
22 mM TE/g), oxygen radical absorbance capacity (whole grain: 47–964; cell wall:
40–183 mM TE/g) and ferric reducing power (whole grain: 85–279; cell wall:
41–95 mg vitamin C equivalent/g). Whole grains contained both phenolic acids
and flavonoids. Ferulic acid was a major component of cell walls.Whole grain and
cell wall extracts inhibited low-density lipoprotein oxidation and protected against
oxidative DNA damage. Cereal and legume cell walls may be considered important
potential contributors to human health because of their phenolic composition.
