Phenolic Compounds and Antioxidant Activity of Sorghum Grains of Varying Genotypes

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• 作者：Linda Dykes ; Lloyd W. Rooney ; Ralph D. Waniska ; and William L. Rooney
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2005
• 出版时间：August 24, 2005
• 年：2005
• 卷：53
• 期：17
• 页码：6813 - 6818
• 全文大小：237K
• 年卷期：v.53,no.17(August 24, 2005)
• ISSN：1520-5118

文摘

The effects of plant color, pericarp thickness, pigmented testa, and spreader genes on phenols andantioxidant activity levels of 13 sorghum genotypes were evaluated. Total phenols, condensed tannins,flavan-4-ols, and anthocyanins were measured. Antioxidant activity levels using the 2,2'-azinobis(3-ethyl-benzothiazoline-6-sulfonic acid) and 2,2-diphenyl-1-picrylhydrazyl assays were evaluated.Sorghums with a pigmented testa and spreader genes (B₁B₂S) had the highest levels of phenolsand antioxidant activity. In addition, sorghums with purple/red plants (PQ) and thick pericarp (z) geneshad increased levels of phenols and antioxidant activity. Sorghums with a black pericarp had higherlevels of flavan-4-ols and anthocyanins than the other varieties. This suggests that genes for plantcolor, pericarp thickness, presence of a pigmented testa, and spreader genes increase phenols andantioxidant activity levels. This information can be useful in the production of sorghums with increasedphenols and antioxidant activity levels.Keywords: Sorghum bicolor (L.) Moench; total phenols; flavan-4-ols; anthocyanins; antioxidant activity;ABTS; DPPH