Growth temperature and genotype both play important roles in sorghum grain phenolic composition
نویسندگان
چکیده
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.
منابع مشابه
Genotypic variation in sorghum [Sorghum bicolor (L.) Moench] exotic germplasm collections for drought and disease tolerance
Sorghum [Sorghum bicolor (L.) Moench] grain yield is severely affected by abiotic and biotic stresses during post-flowering stages, which has been aggravated by climate change. New parental lines having genes for various biotic and abiotic stress tolerances have the potential to mitigate this negative effect. Field studies were conducted under irrigated and dryland conditions with 128 exotic ge...
متن کاملEffects of Genotype and Growth Temperature on the Contents of Tannin, Phytate and In Vitro Iron Availability of Sorghum Grains
BACKGROUND It has been predicted that the global temperature will rise in the future, which means crops including sorghum will likely be grown under higher temperatures, and consequently may affect the nutritional properties. METHODS The effects of two growth temperatures (OT, day/night 32/21°C; HT 38/21°C) on tannin, phytate, mineral, and in vitro iron availability of raw and cooked grains (...
متن کاملThe West African Sorghum Bicolor Leaf Sheath Extract Jobelyn® and its Diverse Therapeutic Potentials
Sorghum bicolor is an ancient plant that has been cultivated in North-eastern Africa for over 5000 years [1]. This is a cane like grass, up to 6 meters tall with large branched clusters of grains. The individual grains are around 3-4 mm in diameter and vary in colour from white, red, brown, yellow, purple, to black. The leaves resemble those of maize and grow rapidly. Sorghum grains of differen...
متن کاملEffect of Gamma, Electron Beam and Infrared Radiation Treatment on the Nutritional Value and Anti-Nutritional Factors of Sorghum Grain
The present study describes the radiation-induced effects on nutritional quality and on anti-nutritional factors of sorghum grain: effects of electron beam (ER) and gamma irradiation (GR) at doses of 10, 20 and 30 kGy and infrared irradiation (IR) at 60, 90 and 120 s on the chemical composition, mineral content and bioavailability, in vitro protein and starch digestibility, total phenolic compo...
متن کاملThe West African Sorghum Bicolor Leaf Sheath Extract Jobelyn® and its Diverse Therapeutic Potentials
Sorghum bicolor is an ancient plant that has been cultivated in North-eastern Africa for over 5000 years [1]. This is a cane like grass, up to 6 meters tall with large branched clusters of grains. The individual grains are around 3-4 mm in diameter and vary in colour from white, red, brown, yellow, purple, to black. The leaves resemble those of maize and grow rapidly. Sorghum grains of differen...
متن کامل