Journal article
Individual polyphenolic profiles and antioxidant activity in sorghum grains are influenced by very low and high solar UV radiation and genotype
G Wu, JF Bornman, SJ Bennett, MW Clarke, Z Fang, SK Johnson
Journal of Cereal Science | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD | Published : 2017
Abstract
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..
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Funding Acknowledgements
The authors would like to thank Professor David Jordan from the Queensland Department of Agriculture and Fisheries, the Grains Research and Development Corporation and the University of Queensland for providing sorghum seeds, and Mr John Jackson, Department of Environment and Agriculture, School of Science, Curtin University for helping with planting and maintenance of the sorghum UV experiment. This work was supported by a Curtin International Postgraduate Research Scholarship (CIPRS), Curtin University, Australia. Mass spectral analysis for this work was carried out by the Centre for Microscopy, Characterisation and Analysis (Metabolomics Australia) and was in part supported by infrastructure funding from the Western Australian State Government in partnership with the Australian Federal Government, through the National Collaborative Research Infrastructure Strategy (NCRIS).