Journal of Food Science and Technology

, Volume 51, Issue 5, pp 976–981 | Cite as

Influence of germination on bioaccessible iron and calcium in pearl millet (Pennisetum typhoideum)

Original Article

Abstract

Pearl millet is the staple for economically poorer section of the world’s population and improving its mineral bioaccessibility is one of the important approaches to promote its utilization. In the absence of any data on the bioaccessible mineral content from commercially available millet, two varieties namely Kalukombu (native) and Maharastra Rabi Bajra (hybrid) were germinated and its effect on the bioaccessible iron and calcium content was explored using an in-vitro method which simulates gastrointestinal digestion. The millet was germinated for 72 h to facilitate maximum mineral extraction. The bioaccessibility of iron and calcium was considerably enhanced upon sprouting. This higher bioaccessibility could be attributed to decrease in antinutritional factors like phytate and oxalate as a result of germination. Changes in mineral and antinutrient content during sprouting led to significant variations in the antinutrient/mineral molar ratios which had a positive impact on the bioaccessible mineral content. Use of tap water for soaking prior to germination revealed contamination of the millet with iron. Contaminant iron in Kalukombu variety appeared to be less accessible; while the same was potentially bioaccessible in Maharashtra Rabi Bajra variety. Hence bioaccessibility of iron depends on the form in which it is present. The actual bioaccessibility of contaminated iron needs to be further investigated.

Keywords

Pearl millet Commercial varieties Bioaccessibility Iron Calcium Germination 

References

  1. Abdalla AA, El Tinay AH, Mohamed BE, Abdalla AH (1998) Proximate composition, starch, phytate and mineral contents of 10 pearl millet genotypes. Food Chem 63(2):243–246CrossRefGoogle Scholar
  2. Alka S, Kapoor AC (1997) Effect of processing on the nutritional quality of pearl millet. J Food Sci Technol 34(1):50–55Google Scholar
  3. Anon (2010) All India coordinated pearl millet improvement project annual report 2009–2010Google Scholar
  4. Anu Sehgal S, Kwatra A (2006) Nutritional evaluation of pearl millet based sponge cake. J of Food Sci Technol 43(3):312–313Google Scholar
  5. AOAC (2005) Official methods of analysis, 18th edn. Association of Official Analytical Chemists, Washington, DCGoogle Scholar
  6. Archana SS, Sehgal S, Kawatra A (1998) Reduction of polyphenols and phytic acid content of pearl millet grains by malting and blanching. Plant Foods Hum Nutr 53:93–98CrossRefGoogle Scholar
  7. Arora P, Sehgal S, Kawatra A (2003) Content and HCl-extractability of minerals as affected by acid treatment of pearl millet. Food Chem 80(1):141–144CrossRefGoogle Scholar
  8. Badau MH, Nkama I, Jideani IA (2005) Phytic acid content and hydrochloric acid extractability of minerals in pearl millet as affected by germination time and cultivar. Food Chem 92:425–435CrossRefGoogle Scholar
  9. Baker CJL (1952) The determination of oxalates in fresh plant materials. Analyst 77:340–344CrossRefGoogle Scholar
  10. Davis NT (1979) Antinutritional factors effecting mineral utilization. Proc Nutr Soc 38:121–127CrossRefGoogle Scholar
  11. FAO/WHO (1995) Codex alimentarius: cereals, pulses, legumes and derived products and vegetable proteins. Codex Alimentarius Commission, vol. 7, Food and Agriculture Organization of the United Nations, Rome, 27–29Google Scholar
  12. Fasasi Olufunmilayo Sade (2009) Proximate, antinutritional factors and functional properties of processed pearl millet (Pennisetum glaucum). J Food Technol 7(3):92–97Google Scholar
  13. GOI (2008) Agricultural statistics at a glance. Department of Agriculture and Cooperation Ministry of Agriculture, Government of India, New DelhiGoogle Scholar
  14. Guansheng M, Jin Y, Piao J, Kok F, Guusje B, Jacobsen E (2005) Phytate, calcium, iron and zinc contents and their molar ratios in foods commonly consumed in China. J Agric Food Chem 53:10285–10290CrossRefGoogle Scholar
  15. Gupta C, Sehgal S (1991) Development, acceptability and nutritional value of weaning mixtures. Plant foods Hum Nutr 41:107–116CrossRefGoogle Scholar
  16. Hallberg L, Brune M, Rossander L (1989) Iron absorbtion in man: ascorbic acid and dose-dependent inhibition by phytate. Am J Clin Nutr 49:140–144Google Scholar
  17. ICRISAT and FAO (1996) The world sorghum and mille economics. International crops research institute for the semi-arid tropics, Patancheru, India. Food and Agriculture Organisation of the United Nations, Rome, pp 31–53Google Scholar
  18. Isabelle L, Besancon P, Caporicco B, Lullien-Pellerin V, Treche S (2005) Iron and zinc in vitro availability in pearl millet flours (Pennisetum glaucum) with varying phytate, tannin and fibre contents. J Agric Food Chem 53:3240–3247CrossRefGoogle Scholar
  19. Lestienne I, Besancon P, Caporiccio B, Lullien-Pellerin V, Treche S (2005) Iron and zinc in vitro availability in pearl millet flours (Pennisetum glaucum) with varying phytate, tannin, and fibre contents. J Agric Food Chem 53(8):3240–3247CrossRefGoogle Scholar
  20. Luten J, Crews H, Flynn A, Van Dael P, Kastenmayer P, Hurrell R, Deelstra H, Shen L-H, Fairweather-Tait S, Hickson K, Farré R, Schlemmer U, Frohlich W (1996) Interlaboratory trial on the determination of the in vitro iron dialysability from food. J Sci Food Agric 72(4):415–424CrossRefGoogle Scholar
  21. Malik M, Singh U, Dahiya S (2002) Nutrient composition of pearl millet as influenced by genotypes and cooking methods. J Food Sci Technol 39(5):463–468Google Scholar
  22. Matilda A, Nilsen R, Lie O, Lied E (1993) Effect of processing (sprouting and/or fermentation) on sorghum and maize. I: proximate composition, minerals and fatty acids. Food Chem 46:351–353CrossRefGoogle Scholar
  23. Morris ER, Ellis R (1985) Bioavailability of dietary calcium-effect of phytate on adult men consuming non vegetarian diets. In: Kies C (ed) ACS Symposium Series 275: Nutritional Bioavailability of Calcium. American Chemical Society, Washington DC, p 63CrossRefGoogle Scholar
  24. Pawar VD, Machewad GM (2006) Changes in availability of iron in barely during malting. J Food Sci Technol 43(1):28–29Google Scholar
  25. Pawar VD, Parlikar GS (1990) Reducing polyphenols and phytate and improving the protein quality of pearl millet by Dehulling and soaking. J Food Sci Technol 27(3):140–143Google Scholar
  26. Raghuramulu N, Nair M and Kalyansundaram S (1983) A manual for laboratory techniques, Jami-Osmania, Hyderabad, India; National Institute of Nutrition, Indian Council for Medical ResearchGoogle Scholar
  27. Ravindran G (1991) Studies on millets: proximate composition, mineral composition and phytate and oxalate contents. Food Chem 39:99–107CrossRefGoogle Scholar
  28. Ruth H, Hesse A (2002) Comparison of extraction methods for the determination of soluble and total oxalate in food by HPLC-enzyme-reactor. Food Chem 78:511–521CrossRefGoogle Scholar
  29. Sushma D, Yadav BK, Tarafdar JC (2008) Phytate phosphorus and mineral changes during soaking, boiling and germination of legumes and pearl millet. J Food Sci Technol 45(4):344–348Google Scholar
  30. Taylor JRN (2004) Millet: pearl in encyclopaedia in grain science, Vol 2, Ed. by Wrigley C, Corke H and Walker CE, Elsevier, London, pp. 253–261Google Scholar
  31. Thompson DB, Erdman JW (1982) Phytic acid determination in soybeans. J Food Sci 47:513–517CrossRefGoogle Scholar
  32. Wang N, Lewis MJ, Brennann JG, Westby A (1997) Effect of processing methods on nutrients and antinutritional factors in cowpea. Food Chem 58:59–68CrossRefGoogle Scholar
  33. Zimmermann MB, Hurrell RF (2007) Nutritional iron deficiency. Lancet 370:511–520CrossRefGoogle Scholar

Copyright information

© Association of Food Scientists & Technologists (India) 2011

Authors and Affiliations

  1. 1.Department of Studies in Food Science and NutritionUniversity of MysoreMysoreIndia

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