Phenolic profile and content of sorghum grains under different irrigation managements

Sorghum grain is widely consumed in Sub-Saharan Africa and Asia, as a staple food due to its adaptation to harsh environments. The impact of irrigation regime: full irrigation (100%); deficit irrigation (50%); and severe deficit irrigation (25%) on phenolic profile and content of six sorghum grain g...

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Bibliographic Details
Published in:Food research international 2017-07, Vol.97, p.347-355
Main Authors: Wu, Gangcheng, Bennett, Sarita J., Bornman, Janet F., Clarke, Michael W., Fang, Zhongxiang, Johnson, Stuart K.
Format: Article
Language:English
Subjects:
Agricultural Irrigation - methods
Climate Change
Droughts
Edible Grain - chemistry
Genotype
HPLC-MS
Irrigation
Phenols - analysis
Plant Extracts - chemistry
Polyphenols
Rain
Sorghum
Sorghum - chemistry
Sorghum - genetics
Sorghum - physiology
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Summary:Sorghum grain is widely consumed in Sub-Saharan Africa and Asia, as a staple food due to its adaptation to harsh environments. The impact of irrigation regime: full irrigation (100%); deficit irrigation (50%); and severe deficit irrigation (25%) on phenolic profile and content of six sorghum grain genotypes was investigated by high performance liquid chromatography coupled with diode array detection and electrospray ionization mass spectrometry (HPLC-DAD-ESI-MS). A total of 25 individual polyphenols were unequivocally or tentatively identified. Compared to the colored-grain genotypes, the white grained sorghum var. Liberty had a simpler polyphenol profile. The concentrations of the sorghum-specific 3-deoxyanthocyanidins luteolinidin and apigeninidin, were higher under deficit irrigation compared to the other two regimes in all genotypes. These findings will be valuable for the selection of sorghum genotypes for grain production as human food under water deficit conditions, since polyphenol levels can affect the grain's nutritional value and health properties. [Display omitted] •Six sorghum genotypes were grown under three different irrigation levels.•Sorghum grain polyphenols were determined by HPLC-DAD-MS/MS.•A total of 25 individual polyphenols were identified.•The polyphenol profiles were influenced by genotype.•Individual polyphenol content was significantly affected by irrigation and genotype.
ISSN:0963-9969
1873-7145
DOI:10.1016/j.foodres.2017.04.030