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    Changes in whole grain polyphenols and antioxidant activity of six sorghum genotypes under different irrigation treatments

    Access Status
    Fulltext not available
    Authors
    Wu, G.
    Johnson, Stuart
    Bornman, J.
    Bennett, Sarita
    Fang, Z.
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Wu, G. and Johnson, S. and Bornman, J. and Bennett, S. and Fang, Z. 2017. Changes in whole grain polyphenols and antioxidant activity of six sorghum genotypes under different irrigation treatments. Food Chemistry. 214: pp. 199-207.
    Source Title
    Food Chemistry
    DOI
    10.1016/j.foodchem.2016.07.089
    ISSN
    0308-8146
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/37408
    Collection
    • Curtin Research Publications
    Abstract

    Sorghum grain containing elevated polyphenolic antioxidant content may provide foods with benefits to human health. A study was undertaken to determine the potential role of irrigation on the content of polyphenols and antioxidant levels in sorghum grain. Bound, free and total polyphenols were investigated in six diverse sorghum genotypes grown under either full irrigation or a deficit irrigation regime. Results showed genotype, irrigation and their interaction had a significant effect on polyphenols and antioxidant activity (P ≤ 0.05). The deficit irrigation treatment significantly increased polyphenol content and antioxidant activity compared to the full irrigation treatment. Of the six genotypes Shawaya black short 1 and IS1311C (brown) showed the highest polyphenols levels and antioxidant activity. Therefore, both irrigation treatments and genotype need to be considered by sorghum breeders and farmers during sorghum production to produce grain with the required levels of polyphenolics and antioxidant activity for targeted end-use.

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