Phytochemical content and antioxidant activity of six diverse varieties of whole wheat

Phytochemical content and antioxidant activity of six diverse varieties of whole wheat The phytochemical content and antioxidant activity of six diverse varieties of whole wheat are reported. The free phenolic content ranged from 255 (KanQueen) to 499 (Roane) μmol gallic acid equivalents/100 g DW. The bound phenolic content ranged from 582 (Roane) to 662 (Cham1) μmol gallic acid equivalents/100 g DW. The bound fraction contributed 53.8–69.7% of the total phenolic content of the wheat varieties analysed. Ferulic acid was the predominant phenolic acid found in whole wheat. Total ferulic acid content ranged from 310.8 (Caledonia) to 496.1 (KanQueen) μmol ferulic acid/100 g DW. The percentage of ferulic acid found in the insoluble-bound fraction ranged from 87.4% (Caledonia) to 97.2% (KanQueen). Other phenolic acids, p- coumaric acid, syringic acid, vanillic acid, and caffeic acid were also detected. Lutein was the predominant carotenoid found in the whole wheat varieties analysed. Zeaxanthin, β-carotene, and β-cryptoxanthin were also detected. Mainly α- and β-tocopherols and α- and β-tocotrienols were found in all varieties of whole wheat though γ-tocopherol was detected in all but two varieties. β-Tocotrienol was the predominant form of vitamin E found in all varieties of whole wheat. The antioxidant activity was assessed using the oxygen radical absorbance capacity (ORAC) assay. The ORAC of the free fraction ranged from 1958 to 3749 μmol Trolox equivalents/100 g DW. The ORAC of the bound fraction ranged from 3190 to 5945 μmol Trolox equivalents/100 g DW. Total phenolic content was correlated with oxygen radical absorbance capacity ( R 2 = 0.810; p < 0.001). The phytochemicals found in whole grains may be responsible for the health benefit of whole grain consumption. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Food Chemistry Elsevier

Phytochemical content and antioxidant activity of six diverse varieties of whole wheat

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Publisher
Elsevier
Copyright
Copyright © 2009 Elsevier Ltd
ISSN
0308-8146
D.O.I.
10.1016/j.foodchem.2009.06.021
Publisher site
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Abstract

The phytochemical content and antioxidant activity of six diverse varieties of whole wheat are reported. The free phenolic content ranged from 255 (KanQueen) to 499 (Roane) μmol gallic acid equivalents/100 g DW. The bound phenolic content ranged from 582 (Roane) to 662 (Cham1) μmol gallic acid equivalents/100 g DW. The bound fraction contributed 53.8–69.7% of the total phenolic content of the wheat varieties analysed. Ferulic acid was the predominant phenolic acid found in whole wheat. Total ferulic acid content ranged from 310.8 (Caledonia) to 496.1 (KanQueen) μmol ferulic acid/100 g DW. The percentage of ferulic acid found in the insoluble-bound fraction ranged from 87.4% (Caledonia) to 97.2% (KanQueen). Other phenolic acids, p- coumaric acid, syringic acid, vanillic acid, and caffeic acid were also detected. Lutein was the predominant carotenoid found in the whole wheat varieties analysed. Zeaxanthin, β-carotene, and β-cryptoxanthin were also detected. Mainly α- and β-tocopherols and α- and β-tocotrienols were found in all varieties of whole wheat though γ-tocopherol was detected in all but two varieties. β-Tocotrienol was the predominant form of vitamin E found in all varieties of whole wheat. The antioxidant activity was assessed using the oxygen radical absorbance capacity (ORAC) assay. The ORAC of the free fraction ranged from 1958 to 3749 μmol Trolox equivalents/100 g DW. The ORAC of the bound fraction ranged from 3190 to 5945 μmol Trolox equivalents/100 g DW. Total phenolic content was correlated with oxygen radical absorbance capacity ( R 2 = 0.810; p < 0.001). The phytochemicals found in whole grains may be responsible for the health benefit of whole grain consumption.

Journal

Food ChemistryElsevier

Published: Mar 1, 2010

References

  • Antioxidant activity of grains
    Adom, K.K.; Liu, R.H.
  • Is the in vitro antioxidant potential of whole-grain cereals and cereal products well reflected in vivo?
    Fardet, A.; Rock, E.; Remesy, C.
  • Nutrient composition and content of antinutritional factors in spelt ( Triticum spelta L.) cultivars
    Grela, E.R.
  • Carotenoids and tocols of einkorn wheat ( Triticum monococcum ssp monococcum L
    Hidalgo, A.; Brandolini, A.; Pompei, C.; Piscozzi, R.
  • Whole grain phytochemicals and health
    Liu, R.H.
  • Molecular linkage map for an intraspecific recombinant inbred population of durum wheat
    Nachit, M.M.; Elouafi, I.; Pagnotta, M.A.; El Saleh, A.; Iacono, E.; Labhilili, M.

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