title: Changes in whole grain polyphenols and antioxidant activity of six sorghum genotypes under different irrigation treatments.
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.
authors: School of Public Health, Curtin University, Perth, WA 6845, Australia.
authors: Gangcheng
authors: G
authors: Wu
authors: School of Public Health, Curtin University, Perth, WA 6845, Australia.
authors: Stuart K
authors: SK
authors: Johnson
authors: International Institute of Agri-Food Security (IIAFS), Curtin University, PO Box U1987, Perth, WA 6845, Australia.
authors: Janet F
authors: JF
authors: Bornman
authors: Department of Environment and Agriculture, School of Science, Curtin University, Perth, WA 6845, Australia.
authors: Sarita J
authors: SJ
authors: Bennett
authors: Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia. Electronic address: zhongxiang.fang@unimelb.edu.au.
authors: Zhongxiang
authors: Z
authors: Fang
mesh_terms: D057914:Agricultural Irrigation; D005838:Genotype; D010084:Oxidation-Reduction; D010936:Plant Extracts; D059808:Polyphenols / Q000032:analysis*; D045868:Sorghum / Q000737:chemistry* / Q000235:genetics; D000067348:Whole Grains / Q000737:chemistry* / Q000235:genetics
chemical_list: D010936:Plant Extracts; D059808:Polyphenols
keywords: 1,1-Diphenyl-2-picrylhydrazine (PubChem CID: 74358); ABTS (PubChem CID: 35687); Acetonitrile (PubChem CID: 6342); Antioxidant activity; Caffeic acid (PubChem CID: 689043); Ferulic acid (PubChem CID: 445858); Gallic acid (PubChem CID: 370); Genotype; Irrigation; Polyphenols; Sorghum grain; Taxifolin (PubChem CID: 439533); Trolox (PubChem CID: 40634)