Growth temperature and genotype both play important roles in sorghum grain phenolic composition

S.K. Johnson; J.F. Bornman; S.J. Bennett; Michael W. Clarke; V. Singh; Z. Fang; Gangcheng Wu

doi:10.1038/srep21835

Growth temperature and genotype both play important roles in sorghum grain phenolic composition

S.K. Johnson, J.F. Bornman, S.J. Bennett, Michael W. Clarke, V. Singh, Z. Fang, Gangcheng Wu

Centre for Microscopy, Characterisation & Analysis

Research output: Contribution to journal › Article › peer-review

72 Citations (Scopus)

Abstract

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, 38/21 °C) were investigated. A total of 23 phenolic compounds were positively or tentatively identified by HPLC-DAD-ESIMS. Compared with other pigmented types, the phenolic profile of white sorghum PI563516 was simpler, since fewer polyphenols were detected. Brown sorghum IS 8525 had the highest levels of caffeic and ferulic acid, but apigenin and luteolin were not detected. Free luteolinidin and apigeninidin levels were lower under HT than OT across all genotypes (p = 0.05), suggesting HT could have inhibited 3-deoxyanthocyanidins formation. These results provide new information on the effects of HT on specific polyphenols in various Australian sorghum genotypes, which might be used as a guide to grow high antioxidant sorghum grains under projected high temperature in the future.

Original language	English
Article number	21835
Journal	Scientific Reports
Volume	6
DOIs	https://doi.org/10.1038/srep21835
Publication status	Published - 24 Feb 2016

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title = "Growth temperature and genotype both play important roles in sorghum grain phenolic composition",

abstract = "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, 38/21 °C) were investigated. A total of 23 phenolic compounds were positively or tentatively identified by HPLC-DAD-ESIMS. Compared with other pigmented types, the phenolic profile of white sorghum PI563516 was simpler, since fewer polyphenols were detected. Brown sorghum IS 8525 had the highest levels of caffeic and ferulic acid, but apigenin and luteolin were not detected. Free luteolinidin and apigeninidin levels were lower under HT than OT across all genotypes (p = 0.05), suggesting HT could have inhibited 3-deoxyanthocyanidins formation. These results provide new information on the effects of HT on specific polyphenols in various Australian sorghum genotypes, which might be used as a guide to grow high antioxidant sorghum grains under projected high temperature in the future.",

author = "S.K. Johnson and J.F. Bornman and S.J. Bennett and Clarke, {Michael W.} and V. Singh and Z. Fang and Gangcheng Wu",

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doi = "10.1038/srep21835",

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T1 - Growth temperature and genotype both play important roles in sorghum grain phenolic composition

AU - Johnson, S.K.

AU - Bornman, J.F.

AU - Bennett, S.J.

AU - Clarke, Michael W.

AU - Singh, V.

AU - Fang, Z.

AU - Wu, Gangcheng

PY - 2016/2/24

Y1 - 2016/2/24

N2 - 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, 38/21 °C) were investigated. A total of 23 phenolic compounds were positively or tentatively identified by HPLC-DAD-ESIMS. Compared with other pigmented types, the phenolic profile of white sorghum PI563516 was simpler, since fewer polyphenols were detected. Brown sorghum IS 8525 had the highest levels of caffeic and ferulic acid, but apigenin and luteolin were not detected. Free luteolinidin and apigeninidin levels were lower under HT than OT across all genotypes (p = 0.05), suggesting HT could have inhibited 3-deoxyanthocyanidins formation. These results provide new information on the effects of HT on specific polyphenols in various Australian sorghum genotypes, which might be used as a guide to grow high antioxidant sorghum grains under projected high temperature in the future.

AB - 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, 38/21 °C) were investigated. A total of 23 phenolic compounds were positively or tentatively identified by HPLC-DAD-ESIMS. Compared with other pigmented types, the phenolic profile of white sorghum PI563516 was simpler, since fewer polyphenols were detected. Brown sorghum IS 8525 had the highest levels of caffeic and ferulic acid, but apigenin and luteolin were not detected. Free luteolinidin and apigeninidin levels were lower under HT than OT across all genotypes (p = 0.05), suggesting HT could have inhibited 3-deoxyanthocyanidins formation. These results provide new information on the effects of HT on specific polyphenols in various Australian sorghum genotypes, which might be used as a guide to grow high antioxidant sorghum grains under projected high temperature in the future.

U2 - 10.1038/srep21835

DO - 10.1038/srep21835

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SN - 2045-2322

VL - 6

JO - Scientific Reports

JF - Scientific Reports

M1 - 21835

ER -

Growth temperature and genotype both play important roles in sorghum grain phenolic composition

Abstract

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