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Antioxidative free and bound phenolic constituents in pericarp, germ and endosperm of Indian dent (Zea mays var. indentata) and flint (Zea mays var. indurata) maize

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Relation http://ir.cftri.com/11713/
http://www.sciencedirect.com/science/article/pii/S175646461500016X
http://dx.doi.org/10.1016/j.jff.2015.01.012
 
Title Antioxidative free and bound phenolic constituents in pericarp, germ and endosperm of Indian dent (Zea mays var. indentata) and flint (Zea mays var. indurata) maize
 
Creator Das, Amit Kumar
Singh, Vasudeva
 
Subject 18 Flavonoid Chemistry
04 Analytical Chemistry
06 Chromatography
09 Quantitative Analysis
 
Description Distribution of phenolics in Indian dent and flint yellow maize was analyzed. HPLC and ESI-MS/MS results indicated that germ of maize samples contained significantly higher free phenolic acids than pericarp whereas, pericarp contained more bound phenolics. Free and bound phenolic acids in pericarp, germ and endosperm of dent maize were 267.5 ± 28.9 and 4329.6 ± 221.5; 468.7 ± 23.0 and 3428.6 ± 101.2; 6.2 ± 0.6 and 172.0 ± 11.1 µg/g, respectively, whereas in flint corn these values were 157.9 ± 27.4 and 5523.3 ± 292.2; 262.3 ± 20.8 and 1341.9 ± 80.6; 19.3 ± 1.3 and 224.0 ± 14.6 µg/g, respectively. Vanillic, syringic, p-hydroxybenzoic, protocatechuric, caffeic, p-coumaric and ferulic acids were detected among phenolic acids. Among flavonoids, cyanidin-3-O-glucoside, kaempferol and quercetin were also detected in trace amounts in the yellow maize. The pattern of radical scavenging by bound phenolic extract of pericarps varied between the samples. Peroxide scavenging and reducing capacity of botanical fractions also varied similarly. Free phenolics contributed 0.6–1.7, 5–15 and 46–60% to the anti-radical, peroxide scavenging and reducing capacity, respectively. Among lipophilic tocochromanols, γ-tocopherol was the most abundant homolog and varied significantly in its content for dent (29.4 ± 8.7 µg/g) and flint maize (63.2 ± 7.5 µg/g). Data show that dent and flint maize hold promise for the development of whole grain functional foods.
 
Publisher Elsevier
 
Date 2015-03
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://ir.cftri.com/11713/1/Antioxidative%20free%20and%20bound%20phenolic%20constituents%20in%20pericarp%2C%20germ%20and%20endosperm%20of%20Indian%20dent%20%28Zea%20mays%20var.%20indentata%29%20and%20flint%20%28Zea%20mays%20var.%20indurata%29%20maize.pdf
Das, Amit Kumar and Singh, Vasudeva (2015) Antioxidative free and bound phenolic constituents in pericarp, germ and endosperm of Indian dent (Zea mays var. indentata) and flint (Zea mays var. indurata) maize. Journal of Functional Foods, 13. pp. 363-374. ISSN 1756-4646