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Pearl millet minerals: effect of processing on bioaccessibility

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Abstract

Pearl millet is an important source of dietary energy, and provides nutritional security for people in the third world countries, particularly in Africa and Asia. Previous studies have shown that pearl millet is an excellent source of micronutrients like iron and zinc. Owing to the presence of inhibitors like phytic acid, polyphenols, and fibres, the bioaccessibility of iron and zinc is very low in pearl millet diet. The present review is an attempt to highlight the localisation of minerals, phytic acid, and polyphenols in pearl millet grains, and various strategies that are being employed for the reduction of inhibitory factors. This review also appraises and gives an overview of the application of combinations of processing conditions and enhancers, that increases the bioaccessibility of iron and zinc either by way of reduction of inhibitory factors or prevention of binding of these inhibitory factors to minerals. The above strategies could be employed to provide better insights into the relevance of different processing methods, to help in the development of speciality foods with enhanced mineral bioaccessibility.

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Source: FAO (2016), Yadav (2011)

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References

  • Abdalla AA, Tinay AHEl, Mohamed BE, Abdalla AH (1998) Effect of traditional processes on phytate and mineral content of pearl millet. Food Chem 63:79–84

    Article  CAS  Google Scholar 

  • Abdalla AA, Ahmed IA, Tinay AHEl (2010) Influence of traditional processing on minerals HCl-extractability of pearl millet (Pennisetum glaucum). Res J Agric Biol Sci 6:530–534

    CAS  Google Scholar 

  • Abdelrahman SM, Elmaki HB, Idris WH, Babiker EE, Tinay AHEl (2005) Antinutritional factors content and minerals availability of pearl millet (Pennisetum glaucum) as influenced by domestic processing methods and cultivation. J Food Technol 3:397–403

    Google Scholar 

  • Abdelrahman SM, Elmaki HB, Idris WH, Hassan AB, Babiker EE, Tinay AHEl (2007) Antinutritional factor content and hydrochloric acid extractability of minerals in pearl millet cultivars as affected by germination. Int J Food Sci Nutr 58:6–17

    Article  CAS  Google Scholar 

  • Agte VV, Khot S, Girigosavi ST, Paknlkar KM, Chiplonkar SA (1999) Comparative performance of pearl millet- and sorghum-based diets vs wheat and rice-based diets trace metal bioavailability. J Trace Elem Med Biol 13:215–219

    Article  CAS  PubMed  Google Scholar 

  • Archana Sehgal S, Kawatra A (1998) Reduction of polyphenol and phytic acid content of pearl millet grains by malting and blanching. Plant Foods Hum Nutr 53:93–98

    Article  Google Scholar 

  • Arora P, Sehgal S, Kawatra A (2003) Content and HCl-extractability of minerals as affected by acid treatment of pearl millet. Food Chem 80:141–144

    Article  CAS  Google Scholar 

  • 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 92:425–435

    Article  CAS  Google Scholar 

  • Bamji MS, Krishnaswamy K, Brahmam GNV (2009) Textbook of human nutrition, 3rd edn. Oxford & IBH Publishing Co. Pvt. Ltd., New Delhi

    Google Scholar 

  • Bhati D, Bhatnagar V, Acharya V (2016) Effect of pre-milling processing techniques on pearl millet grains with special reference to in vitro iron availability. Asian J Dairy Food Res 35:76–80

    Article  Google Scholar 

  • Brown KH, Rivera JA, Bhutta Z, Gibson RS, King JC, Lonnerdal B, Ruel MT, Sandtrom B, Wasantwisut E, Hotz C (2004) International Zinc Nutrition Consultative Group (IZiNCG) technical document #1. Assessment of the risk of zinc deficiency in populations and options for its control. Food Nutr Bull 25:S99–S199

    Article  PubMed  Google Scholar 

  • Brune M, Hallberg L, Skanberg AB (1991) Determination of iron-binding phenolic groups in foods. J Food Sci 56:128

    Article  CAS  Google Scholar 

  • Brune M, Rossander-Hulten L, Hallberg L, Gleerup A, Sandberg AS (1992) Iron absorption from bread in humans: inhibiting effects of cereal fibre, phytate and inositol phosphates with different numbers of phosphate groups. J Nutr 122:442–449

    Article  CAS  PubMed  Google Scholar 

  • Bunzel M, Ralph J, Marita JM, Hatfield RD, Steinhart H (2001) Diferulates as structural components in soluble and insoluble cereal dietary fibre. J Sci Food Agric 81:653–660

    Article  CAS  Google Scholar 

  • Chandrasekara A, Shahidi F (2011) Bioactivities and antiradical properties of millet grains and hulls. J Agric Food Chem 59:9563–9571

    Article  CAS  PubMed  Google Scholar 

  • Chowdhury S, Punia D (1997) Nutrient and antinutrient composition of pearl millet grains as affected by milling and baking. Nahrung 41:105–107

    Article  Google Scholar 

  • Coulibaly A, Kouakou B, Chen J (2011) Phytic acid in cereal grains: healthy or harmful ways to reduce phytic acid in cereal grains and their effects on nutritional quality. Am J plant Nutr Fertil Technol 1:1–22

    Article  Google Scholar 

  • Dave S, Yadav BK, Tarafdar JC (2008) Phytate phosphorus and mineral changes during soaking, boiling and germination of legumes and pearl millet. J Food Sci Technol 45:344–348

    CAS  Google Scholar 

  • Djanaguiraman M, Perumal R, Ciampitti IA, Gupta SK, Prasad PVV (2017) Quantifying pearl millet response to high-temperature stress: thresholds, sensitive stages, genetic variability and relative sensitivity of pollen and pistil. Plant Cell Environ 41:1–15

    Google Scholar 

  • Egli I, Davidsson L, Juillerat MA, Barclay D, Hurrell R (2002) The influence of soaking and germination on the phytase activity and phytic acid content of grains and seeds potentially useful for complementary feeding. J Food Sci 67:3484–3488

    Article  CAS  Google Scholar 

  • Eyzaguirre RZ, Nienaltowska K, de Jong LEQ, Hasenack BBE, Nout MJR (2006) Effect of food processing of pearl millet (Pennisetum glaucum) IKMP-5 on the level of phenolics, phytate, iron and zinc. J Sci Food Agric 86:1391–1398

    Article  CAS  Google Scholar 

  • Fairweather-Tait S, Phillips I, Wortley G, Harvey L, Glahn R (2007) The use of solubility, dialysability, and Caco-2 cell methods to predict iron bioaccessibility. Int J Vitam Nutr Res 77:158–165

    Article  CAS  PubMed  Google Scholar 

  • FAO (2016). http://www.fao.org/faostat/en/#data/QC. Accessed 18 Dec 2017

  • Garcia-Casal MN, Layrisse M, Solano L, Baron MA, Arguello F, Llovera D, Ramirez J, Leets I, Tropper E (1998) Vitamin A and β-carotene can improve nonheme iron absorption from rice, wheat, and corn by humans. J Nutr 128:646–650

    Article  CAS  PubMed  Google Scholar 

  • Gautam S, Platel K, Srinivasan K (2011) Influence of combinations of promoter and inhibitor on the bioaccessibility of iron and zinc from food grains. Int J Food Sci Nutr 62:826–834

    Article  CAS  PubMed  Google Scholar 

  • Gibson RS, Yeudall F, Drost N, Mitimuni BM, Cullinan TR (2003) Experiences of a community-based dietary intervention to enhance micronutrient adequacy of diets low in animal source foods and high in phytate: a case study in rural Malawian children. J Nutr 133:3992S–3999S

    Article  CAS  PubMed  Google Scholar 

  • Gopalan C, Rama Sastri BV, Balasubramanian SC (2003) Nutritive value of Indian Foods. National Institute of Nutrition, Hyderabad

    Google Scholar 

  • Gupta RK, Gangoliya SS, Singh NK (2015) Reduction of phytic acid and enhancement of bioavailable micronutrients in food grains. J Food Sci Technol 52:676–684

    Article  CAS  PubMed  Google Scholar 

  • Hag MEEl, Tinay AHEl, Yousif NE (2002) Effect of fermentation and dehulling on starch, total polyphenols, phytic acid content and in vitro protein digestibility of pearl millet. Food Chem 77:193–196

    Article  Google Scholar 

  • Hama F, re Icard-Vernie C, Guyot JP, Picq C, Diawara B, Mouquet-Rivier C (2011) Evolution of the micro- and macronutrient composition of pearl millet (Pennisetum glaucum) and white sorghum (Sorghum bicolor) during infield versus laboratory decortications. J Cereal Sci 54:425–433

    Article  CAS  Google Scholar 

  • Hemalatha S, Platel K, Srinivasan K (2007) Zinc and iron contents and their bioaccessibility in cereals and pulses consumed in India. Food Chem 102:1328–1336

    Article  CAS  Google Scholar 

  • Hemery Y, Rouau X, Lullien-Pellerin V, Barron C, Abecassis J (2007) Dry processes to develop wheat fractions and products with enhanced nutritional quality. J Cereal Sci 46:327–347

    Article  CAS  Google Scholar 

  • Hotz C, Gibson RS (2001) Assessment of home-based processing methods to reduce phytate content and phytate/zinc molar ratios of white maize (Zea mays). J Agric Food Chem 49:692–698

    Article  CAS  PubMed  Google Scholar 

  • Hurrell RF (2004) Phytic acid degradation as a means of improving iron absorption. Int J Vitam Nutr Res 74:445–452

    Article  CAS  PubMed  Google Scholar 

  • Hurrell R, Egli I (2010) Iron bioaccessibility and dietary reference values. Am J Clin Nutr 91:1461S–1467S

    Article  CAS  PubMed  Google Scholar 

  • Hurrell RF, Reddy M, Cook JD (1999) Inhibition of non-haem iron absorption in man by polyphenolic-containing beverages. Br J Nutr 81:289–295

    CAS  PubMed  Google Scholar 

  • Jha N, Krishnan R, Meera MS (2015) Effect of different soaking conditions on inhibitory factors and bioaccessibility of iron and zinc in pearl millet. J Cereal Sci 66:46–52

    Article  CAS  Google Scholar 

  • Kaur KD, Jha A, Sabikhi L, Singh AK (2014) Significance of coarse cereals in health and nutrition: a review. J Food Sci Technol 51:1429–1441

    Article  CAS  PubMed  Google Scholar 

  • Kodkany BS, Bellad RM, Mahantshetti NS, Westcott JE, Krebs NF, Kemp JF, Hambidge KM (2013) Biofortification of pearl millet with iron and zinc in a randomised controlled trial increases absorption of these minerals above physiologic requirements in young children. J Nutr 143:1489–1493

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  • Krishnan R, Dharmaraj Usha, Malleshi NG (2012) Influence of decortication, popping and malting on bioaccessibility of calcium, iron, and zinc in finger millet. LWT Food Sci Technol 48:169–174

    Article  CAS  Google Scholar 

  • Leder I (2004) Sorghum and millets. In: Fuleky G (ed) Cultivated plants, primarily as food sources. Encyclopedia of Life Support Systems (EOLSS), Developed under the Auspices of the UNESCO, Eolss Publishers, Oxford

    Google Scholar 

  • Lestienne I, Besancon P, Caporiccio B, Lullien-Pelerin V, Treche S (2005a) Iron and zinc in vitro availability in pearl millet flours (Pennisetum glaucum) with varying phytate, tannin, and fibre contents. J Agric Food Chem 53:3240–3247

    Article  CAS  PubMed  Google Scholar 

  • Lestienne I, Caporiccio B, Besancon P, Rochette I, Treche S (2005b) Relative contribution of phytates, fibres, and tannins to low iron and zinc in vitro solubility in pearl millet (Pennisetum glaucum) flour and grain fractions. J Agric Food Chem 53:8342–8348

    Article  CAS  PubMed  Google Scholar 

  • Lestienne I, Icard-Verniere C, Mouquet C, Picq C, Treche S (2005c) Effects of soaking whole cereal and legume seeds on iron, zinc and phytate contents. Food Chem 89:421–425

    Article  CAS  Google Scholar 

  • Lestienne I, Buisson M, Lullien-Pellerin V, Picq C, Treche S (2007) Losses of nutrients and anti-nutritional factors during abrasive decortication of two pearl millet cultivars (Pennisetum glaucum). Food Chem 100:1316–1323

    Article  CAS  Google Scholar 

  • Mahgoub SEO, Elhag SA (1998) Effect of milling, soaking, malting, heat-treatment and fermentation on phytate level of four Sudanese sorghum cultivars. Food Chem 61:77–80

    Article  CAS  Google Scholar 

  • Masud T, Mahmood T, Latif A, Sammi S, Hameed T (2007) Influence of processing and cooking methodologies for reduction of phytic acid content in wheat (Triticum aestivum) varieties. J Food Process Preserv 31:583–594

    Article  CAS  Google Scholar 

  • Minnis-Ndimba R, Kruger J, Taylor JRN, Mtshali C, Pineda-Vargas CA (2015) Micro-PIXE mapping of mineral distribution in mature grain of two pearl millet cultivars. Nucl Instrum Methods Phys Res B 363:177–182

    Article  CAS  Google Scholar 

  • Nandini CD, Salimath PV (2001) Carbohydrate composition of wheat, wheat bran, sorghum, and bajra with good chapatti/roti (Indian flatbread) making quality. Food Chem 73:197–203

    Article  CAS  Google Scholar 

  • National Research Council (1996) Lost crops of Africa. Volume I: grains. National Academy Press, Washington, DC

    Google Scholar 

  • Nithya KS, Ramachandramurty B, Krishnamoorthy VV (2007) Effect of processing methods on nutritional and anti-nutritional qualities of hybrid (COHCU-8) and traditional (CO7) pearl millet varieties of India. J Biol Sci 7:643–647

    Article  CAS  Google Scholar 

  • Ocheme OB, Chinma CE (2008) Effects of soaking and germination on some physicochemical properties of millet flour for porridge production. J Food Technol 6:185–188

    Google Scholar 

  • Okazaki Y, Katayama T (2005) Reassessment of the nutritional function of phytic acid, with special reference to myoinositol function. J Jpn Soc Nutr Food Sci 58:151–156

    Article  CAS  Google Scholar 

  • Perlas L, Gibson RS (2002) Use of soaking to enhance the bioavailability of iron and zinc from rice-based complementary foods used in the Philippines. J Sci Food Agric 82:1115–1121

    Article  CAS  Google Scholar 

  • Poiana MA, Alexa E, Bragea M (2009) Studies concerning the phosphorus bioavailability improvement of some cereals used in nourishment. Roum Biotechnol Lett 14:4467–4473

    Google Scholar 

  • Poonam (2002) Effect of acid and heat treatment on nutrient composition and shelf life of pearl millet (Pennisetum glaucum) flour. MSc thesis, Hisar, Haryana, India: CCS Haryana Agricultural University

  • Pushparaj FS, Urooj A (2011) Influence of processing on dietary fibre, tannin and in vitro protein digestibility of pearl millet. Food Nutr Sci 2:895–900

    CAS  Google Scholar 

  • Pushparaj FS, Urooj A (2014) Nutrients, antinutrients and bioaccessible mineral content (in vitro) of pearl millet as influenced by milling. J Food Sci Technol 51:756–761

    Article  CAS  Google Scholar 

  • Rai KN, Gowda CLL, Reddy BVS, Sehgal S (2008) Adaptation and potential uses of sorghum and pearl millet in alternative and health foods. Compr Rev Food Sci Food Saf 7:340–352

    Google Scholar 

  • Rekha KA, Sehgal S (1999) Effects of malting and blanching processing technique on the nutrient content of pearl millet. In: Proceedings of 2nd national seminar on home science for rural development 21st century, pp 410–415

  • Sade FO (2009) Proximate, antinutritional factors and functional properties of processed pearl millet. J Food Technol 7:92–97

    CAS  Google Scholar 

  • Sandberg AS (2002) In vitro and in vivo degradation of phytate. In: Reddy NR, Sathe SK (eds) Food phytates. CRC Press, Boca Raton, pp 139–155

    Google Scholar 

  • Sharma A, Kapoor AC (1996) Levels of antinutritional factors in pearl millet as affected by processing treatment and various types of fermentation. Plant Food Hum Nutr 49:241–252

    Article  CAS  Google Scholar 

  • Sihag MK, Sharma V, Goyal A, Arora S, Singh AK (2015) Effect of domestic processing treatments on iron, β-carotene, phytic acid and polyphenols of pearl millet. Cogent Food Agric 1:1–12

    Google Scholar 

  • Singh G, Sehgal S, Kawatra A, Preeti (2006) Mineral profile, anti-nutrients and in vitro digestibility of biscuit prepared from blanched and malted pearl millet flour. Nutr Food Sci 36:231–239

    Article  Google Scholar 

  • Sperotto RA, Boff T, Duarte GL, Santos LS, Grusak MA, Fett JP (2010) Identification of putative target genes to manipulate Fe and Zn concentrations in rice grains. J Plant Physiol 167:1500–1506

    Article  CAS  PubMed  Google Scholar 

  • Takahashi M, Nozoye T, Kitajima N, Fukuda N, Hokura A, Terada Y, Nakai I, Ishimaru Y, Kobayashi T, Nakanishi H, Nishizawa NK (2009) In vivo analysis of metal distribution and expression of metal transporters in rice seed during germination process by microarray and X-ray fluorescence Imaging of Fe, Zn, Mn, and Cu. Plant Soil 325:39–51

    Article  CAS  Google Scholar 

  • Taylor JRN, Duodu K (2015) Effects of processing sorghum and millets on their phenolic phytochemicals and the implications of this to the health-enhancing properties of sorghum and millet food and beverage products. J Sci Food Agric 95:225–237

    Article  CAS  PubMed  Google Scholar 

  • Teucher B, Olivares M, Cori H (2004) Enhancers of iron absorption: ascorbic acid and other organic acids. Int J Vitam Nutr Res 74:403–419

    Article  CAS  PubMed  Google Scholar 

  • Velu G, Bhattacharjee R, Rai KN, Sahrawat KL, Longvah T (2006) A simple and rapid screening method for grain zinc content in pearl millet. SAT eJournal 6:1–4

    Google Scholar 

  • Velu G, Kulkarni VN, Muralidharan V, Rai KN, Longvah T, Sahrawat KL, Raveendran TS (2008a) A rapid screening method for grain iron content in pearl millet. SAT eJournal 2:1–4

    Google Scholar 

  • Velu G, Ra KN, Sahrawat KL (2008b) Variability for grain iron and zinc content in a diverse range of pearl millet populations. Crop Improv 35:186–191

    Google Scholar 

  • Yadav OP (2011) Review of pearl millet research. In: Proceedings of all India Coordinated Pearl Millet Improvement Project (AICPMIP) workshop on 12–14 March 2011, Hisar, Jodhpur, Rajasthan, India

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Acknowledgements

The authors acknowledge with thanks the support received from Director, CSIR-CFTRI, Mysuru.

Funding

The author (RK) gratefully acknowledges Indian Council of Medical Research (Project Number: 2011-11750) New Delhi, for the award of Senior Research Fellowship.

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Correspondence to M. S. Meera.

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Krishnan, R., Meera, M.S. Pearl millet minerals: effect of processing on bioaccessibility. J Food Sci Technol 55, 3362–3372 (2018). https://doi.org/10.1007/s13197-018-3305-9

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