Cereal Foods World, Vol. 64, No. 5
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Sorghum as a Healthy Global Food Security Crop: Opportunities and Challenges
Tadesse F. Teferra1,2 and Joseph M. Awika1,3
1 Department of Soil and Crop Sciences and Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, U.S.A.
2 School of Nutrition and Food Science, Hawassa University, Hawassa, SNNPR, Ethiopia. Facebook: Tadesse Fikre Teferra; LinkedIn: www.linkedin.com/in/tadesse-fikre-teferra-phd-449b9817.
3 Corresponding author. E-mail email@example.com
© 2019 AACC International, Inc.
Climate change is an enormous challenge facing humanity. To meet this challenge, a shift toward more climate resilient, but underdeveloped and underutilized, crops such as sorghum is of great interest. Sorghum performs relatively well under water scarcity and elevated temperature conditions compared with the major cereal crops wheat, rice, and maize (corn). From a nutritional perspective, a major advantage of sorghum as a healthy and nutritious crop is its higher proportion of slowly digestible and resistant starch components compared with other staple cereal crops. This property of sorghum reduces postprandial hyperglycemia in humans and could potentially be manipulated to reduce overall calorie intake from products made with sorghum. Sorghum also is uniquely rich in diverse bioactive polyphenols and other beneficial compounds that are associated with reduced risk of nutrition-linked chronic diseases, including type 2 diabetes, cardiovascular disease, and some types of cancer. Some of the bioactive compounds found in sorghum, such as high molecular weight tannins, also have technological benefits due to their ability to modify protein and starch functionality, which can be used to produce new bioactive ingredients or enhance food quality. The key challenges associated with use of sorghum as a food ingredient are its lower endosperm functionality and relatively low protein digestibility; both attributes are related to the tendency of the hydrophobic sorghum endosperm protein kafirin to cross-link during processing. Recent developments in the utilization of traditional genetics to alter the structure and functionality of the kafirin protein in sorghum show a lot of promise for unlocking the full food use potential of sorghum. These improved sorghum lines have demonstrated enhanced food use quality and protein digestibility. This review summarizes emerging opportunities and challenges associated with sorghum production and utilization as a healthy food ingredient.
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- Aboubacar, A., Axtell, J. D., Huang, C.-P., and Hamaker, B. R. A rapid protein digestibility assay for identifying highly digestible sorghum lines. Cereal Chem. 78:160, 2001.
- Agah, S., Kim, H., Mertens-Talcott, S. U., and Awika, J. M. Complementary cereals and legumes for health: Synergistic interaction of sorghum flavones and cowpea flavonols against LPS-induced inflammation in colonic myofibroblasts. Mol. Nutr. Food Res. 61(7). DOI: https://doi.org/10.1002/mnfr.201600625. 2017.
- Amoako, D. B., and Awika, J. M. Polymeric tannins significantly alter properties and in vitro digestibility of partially gelatinized intact starch granule. Food Chem. 208:10, 2016.
- Amoako, D. B., and Awika, J. M. Resistant starch formation through intrahelical V-complexes between polymeric proanthocyanidins and amylose. Food Chem. 285:326, 2019.
- Anunciaçãoa, P. C., de Morais Cardoso, L., Gomes, J. V. P., Della Lucia, C. M., Carvalho, C. W. P., Galdeano, M. C., Vieira Queiroz, V. A., de Cássia Gonçalves Alfenas, R., Stampini Duarte Martino, H., and Pinheiro-Sant’ana, H. M. Comparing sorghum and wheat whole grain breakfast cereals: Sensorial acceptance and bioactive compound content. Food Chem. 221:984, 2017.
- Anunciação, P. C., de Morais Cardoso, L., Vieira Queiroz, V. A., de Menezes, C. B., Carvalho, C. W. P., Pinheiro-Sant’ana, H. M., and de Cássia Gonçalves Alfenas, R. Consumption of a drink containing extruded sorghum reduces glycaemic response of the subsequent meal. Eur. J. Nutr. 57:251, 2018.
- Arbex, P. M., de Castro Moreira, M. E., Lopes Toledo, R. C., de Morais Cardoso, L., Pinheiro-Sant’ana, H. M., dos Anjos Benjamin, L., Licursi, L., Carvalho, C. W. P., Vieira Queiroz, V. A., and Stampini Duarte Martino, H. Extruded sorghum flour (Sorghum bicolor L.) modulates adiposity and inflammation in high fat diet-induced obese rats. J. Funct. Foods 42:346, 2018.
- Awika, J. M. Sorghum: Its unique nutritional and health-promoting attributes. Page 21 in: Gluten-Free Ancient Grains: Cereals, Pseudocereals, and Legumes: Sustainable, Nutritious, and Health-Promoting Foods for the 21st Century. Woodhead Publishing Series in Food Science, Technology and Nutrition. J. R. N. Taylor and J. M. Awika, eds. Woodhead Publishing, Sawston, U.K., 2017.
- Awika, J. M., and Rooney, L. W. Sorghum phytochemicals and their potential impact on human health. Phytochemistry 65:1199, 2004.
- Awika, J. M., Rose, D. J., and Simsek, S. Complementary effects of cereal and pulse polyphenols and dietary fiber on chronic inflammation and gut health. Food Funct. 9:1389, 2018.
- Belton, P., Delgadillo, I., Halford, N., and Shewry, P. Kafirin structure and functionality. J. Cereal Sci. 44:272, 2006.
- Chijioke, O. B., Haile, M., and Waschkeit, C. Implication of climate change on crop yield and food accessibility in sub-Saharan Africa. Published online at www.zef.de/fileadmin/downloads/forum/docprog/Termpapers/2011_1_Oyiga__Haile_Waschkeit.pdf. Centre for Development Research, University of Bonn, Bonn, Germany, 2011.
- Dunn, K. L., Yang, L., Girard, A., Bean, S., and Awika, J. M. Interaction of sorghum tannins with wheat proteins and effect on in vitro starch and protein digestibility in a baked product matrix. J. Agric. Food Chem. 63:1234, 2015.
- Duodu, K., Taylor, J., Belton, P., and Hamaker, B. Factors affecting sorghum protein digestibility. J. Cereal Sci. 38:117, 2003.
- Dykes, L., Seitz, L. M., Rooney, W. L., and Rooney, L. W. Flavonoid composition of red sorghum genotypes. Food Chem. 116:313, 2009.
- Farré, I., and Faci, J. M. Comparative response of maize (Zea mays L.) and sorghum (Sorghum bicolor L. Moench) to deficit irrigation in a Mediterranean environment. Agric. Water Manag. 83:135, 2006.
- Geera, B., Ojwang, L. O., and Awika, J. M. New highly stable dimeric 3-deoxyanthocyanidin pigments from sorghum bicolor leaf sheath. J. Food Sci. 77:C566, 2012.
- Girard, A. L., and Awika, J. M. Sorghum polyphenols and other bioactive components as functional and health promoting food ingredients. J. Cereal Sci. 84:112, 2018.
- Girard, A. L., Bean, S. R., Tilley, M., Adrianos, S. L., and Awika, J. M. Interaction mechanisms of condensed tannins (proanthocyanidins) with wheat gluten proteins. Food Chem. 245:1154, 2018.
- Girard, A. L., Castell-Perez, M. E., Bean, S. R., Adrianos, S. L., and Awika, J. M. Effect of condensed tannin profile on wheat flour dough rheology. J. Agric. Food Chem. 64:7348, 2016.
- Godfray, H. C. J., and Garnett, T. Food security and sustainable intensification. Philos. Trans. R. Soc. B Biol. Sci. 369(1639). DOI: https://doi.org/10.1098/rstb.2012.0273. 2014.
- Khan, I., Yousif, A. M., Johnson, S. K., and Gamlath, S. Acute effect of sorghum flour-containing pasta on plasma total polyphenols, antioxidant capacity and oxidative stress markers in healthy subjects: A randomised controlled trial. Clin. Nutr. 34:415, 2015.
- Li, A., Jia, S., Yobi, A., Ge, Z., Sato, S. J., Zhang, C., Angelovici, R., Clemente, T. E., and Holding, D. R. Editing of an α-kafirin gene family increases, digestibility and protein quality in sorghum. Plant Physiol. 177:1425, 2018.
- Ojwang, L. O., and Awika, J. M. Stability of apigeninidin and its methoxylated derivatives in the presence of sulfites. J. Agric. Food Chem. 58:9077, 2010.
- Oria, M. P., Hamaker, B. R., Axtell, J. D., and Huang, C.-P. A highly digestible sorghum mutant cultivar exhibits a unique folded structure of endosperm protein bodies. Proc. Natl. Acad. Sci. U.S.A. 97:5065, 2000.
- Oria, M. P., Hamaker, B. R., and Shull, J. M. Resistance of sorghum α, β, and γ-kafirins to pepsin digestion. J. Agric. Food Chem. 43:2148, 1995.
- Poquette, N. M., Gu, X., and Lee, S.-O. Grain sorghum muffin reduces glucose and insulin responses in men. Food Funct. 5:894, 2014.
- Ringler, C., Zhu, T., Cai, X., Koo, J., and Wang, D. Climate change impacts on food security in sub-Saharan Africa. Insights from comprehensive climate change scenarios. International Food Policy Research Institute, Washington, DC, 2010.
- Simnadis, T. G., Tapsell, L. C., and Beck, E. J. Effect of sorghum consumption on health outcomes: A systematic review. Nutr. Rev. 74:690, 2016.
- Singh, R., and Axtell, J. D. High lysine mutant gene (hl) that improves protein quality and biological value of grain sorghum. Crop Sci. 13:535, 1973.
- Staggenborg, S. A., Dhuyvetter, K. C., and Gordon, W. Grain sorghum and corn comparisons: Yield, economic, and environmental responses. Agron. J. 100:1600, 2008.
- Taleon, V., Dykes, L., Rooney, W., and Rooney, L. Environmental effect on flavonoid concentrations and profiles of red and lemon-yellow sorghum grains. J. Food Compos. Anal. 34:178, 2014.
- Taylor, J. R. N., and Awika, J. M., eds. Gluten-Free Ancient Grains: Cereals, Pseudocereals, and Legumes: Sustainable, Nutritious, and Health-Promoting Foods for the 21st Century. Woodhead Publishing Series in Food Science, Technology and Nutrition. Woodhead Publishing, Sawston, U.K., 2017.
- Teferra, T. F., Amoako, D. B., Rooney, W. L., and Awika, J. M. Qualitative assessment of ‘highly digestible’ protein mutation in hard endosperm sorghum and its functional properties. Food Chem. 271:561, 2019.
- Tesso, T., Ejeta, G., Chandrashekar, A., Huang, C.-P., Tandjung, A., Lewamy, M., Axtell, J. D., and Hamaker, B. R. A novel modified endosperm texture in a mutant high-protein digestibility/high-lysine grain sorghum (Sorghum bicolor (L.) Moench). Cereal Chem. 83:194, 2006.
- Vieira Queiroz, V. A., da Silva Aguiar, A., de Menezes, C. B., de Carvalho, C. W. P., Paiva, C. L., Costa Fonseca, P., and da Conceição, R. R. P. A low calorie and nutritive sorghum powdered drink mix: Influence of tannin on the sensorial and functional properties. J. Cereal Sci. 79:43, 2018.
- Virupaksha, T., and Sastry, L. Protein content and amino acid composition of some varieties of grain sorghum. J. Agric. Food Chem. 16:199, 1968.
- Weaver, C. A., Hamaker, B. R., and Axtell, J. D. Discovery of grain sorghum germ plasm with high uncooked and cooked in vitro protein digestibilities. Cereal Chem. 75:665, 1998.
- Winn, J. A., Mason, R. E., Robbins, A. L., Rooney, W. L., and Hays, D. B. QTL mapping of a high protein digestibility trait in Sorghum bicolor. Int. J. Plant Genomics 2009(2). DOI: http://dx.doi.org/10.1155/2009/471853. 2009.
- Wong, J. H., Lau, T., Cai, N., Singh, J., Pedersen, J. F., Vensel, W. H., Hurkman, W. J., Wilson, J. D., Lemaux, P. G., and Buchanan, B. B. Digestibility of protein and starch from sorghum (Sorghum bicolor) is linked to biochemical and structural features of grain endosperm. J. Cereal Sci. 49:73, 2009.
- Yang, L., Allred, K. F., Dykes, L., Allred, C. D., and Awika, J. M. Enhanced action of apigenin and naringenin combination on estrogen receptor activation in non-malignant colonocytes: Implications on sorghum-derived phytoestrogens. Food Funct. 6:749, 2015.
- Yang, L., Allred, K. F., Geera, B., Allred, C. D., and Awika, J. M. Sorghum phenolics demonstrate estrogenic action and induce apoptosis in nonmalignant colonocytes. Nutr. Cancer 64:419, 2012.
- Zereyesus, Y. A., and Dalton, T. J. Rates of return to sorghum and millet research investments: A meta-analysis. PloS One 12(7). DOI: https://doi.org/10.1371/journal.pone.0180414. 2017.
- Zhang, G., and Hamaker, B. R. Low α-amylase starch digestibility of cooked sorghum flours and the effect of protein. Cereal Chem. 75:710, 1998.