title: Effects of Genotype and Growth Temperature on the Contents of Tannin, Phytate and In Vitro Iron Availability of Sorghum Grains.
abstract: 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 (as porridge) of six sorghum genotypes were investigated.
  
  
  RESULTS
  Tannin content significantly decreased across all sorghum genotypes under high growth temperature (P ≤0.05), while the phytate and mineral contents maintained the same level, increased or decreased significantly, depending on the genotype. The in vitro iron availability in most sorghum genotypes was also significantly reduced under high temperature, except for Ai4, which showed a pronounced increase (P ≤0.05). The cooking process significantly reduced tannin content in all sorghum genotypes (P ≤0.05), while the phytate content and in vitro iron availability were not significantly affected.
  
  
  CONCLUSIONS
  This research provides some new information on sorghum grain nutritional properties when grown under predicted future higher temperatures, which could be important for humans where sorghum grains are consumed as staple food.
authors: Food Science and Technology Program, School of Public Health, Curtin University, Perth, WA, 6845, Australia.
authors: Gangcheng
authors: G
authors: Wu
authors: Food Science and Technology Program, 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: Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Qld, 4072, Australia.
authors: Vijaya
authors: V
authors: Singh
authors: National Measurement Institute, Perth, WA, 6151, Australia.
authors: Azra
authors: A
authors: Simic
authors: Food Science and Technology Program, School of Public Health, Curtin University, Perth, WA, 6845, Australia.|Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, 3010, Australia.
authors: Zhongxiang
authors: Z
authors: Fang
mesh_terms: D000818:Animals; D001315:Australia; D001682:Biological Availability; D002417:Cattle; D002523:Edible Grain / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D005838:Genotype; D057232:Global Warming; D006801:Humans; D066298:In Vitro Techniques; D007501:Iron / Q000378:metabolism* / Q000493:pharmacokinetics; D009753:Nutritive Value; D010833:Phytic Acid / Q000378:metabolism*; D000069600:Plant Breeding; D045868:Sorghum / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*; D013634:Tannins / Q000378:metabolism*; D013696:Temperature
chemical_list: D013634:Tannins; D010833:Phytic Acid; D007501:Iron