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    Individual polyphenolic profiles and antioxidant activity in sorghum grains are influenced by very low and high solar UV radiation and genotype

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    Authors
    Wu, G.
    Bornman, Janet
    Bennett, Sarita
    Clarke, M.
    Fang, Z.
    Johnson, Stuart
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Wu, G. and Bornman, J. and Bennett, S. and Clarke, M. and Fang, Z. and Johnson, S. 2017. Individual polyphenolic profiles and antioxidant activity in sorghum grains are influenced by very low and high solar UV radiation and genotype. Journal of Cereal Science. 77: pp. 17-23.
    Source Title
    Journal of Cereal Science
    DOI
    10.1016/j.jcs.2017.07.014
    ISSN
    0733-5210
    School
    School of Management
    URI
    http://hdl.handle.net/20.500.11937/55884
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Elsevier Ltd Sorghum is becoming more widely recognised around the world as a valuable crop for its polyphenol antioxidant health-promoting properties and adaptation to harsh environments. The antioxidant capacity of diverse polyphenols in sorghum grain can vary with climatic conditions and genotype. To explore this further, the potential role of UV radiation on the profile and concentration of polyphenols was investigated in six diverse sorghum genotypes in a controlled environment facility using natural UV and visible radiation under either UV-transmitting or UV-blocking treatments. The polyphenol content and antioxidant activity were significantly reduced under the UV-blocking treatment, with contents of individual polyphenols differing among the genotypes. This information is valuable for sorghum breeders enabling them to select genotypes and UV growth conditions to produce sorghum grain with target levels of polyphenols and antioxidant capacity for human foods to meet the nutritional and health needs of different consumers.

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      Polyphenols in sorghum grains are a source of dietary antioxidants. Polyphenols in six diverse sorghum genotypes grown under two day/night temperature regimes of optimal temperature (OT, 32/21 °C and high temperature (HT, ...
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