Differences of Some Chemicals and Physical Properties of Winter Wheat Grain of Mealy and Vitreous Appearance
Many wheat species and cultivars, independent of genetic markers of hardness, can produce grain with a vitreous, mealy or mixed appearance. This study analyzed selected chemical and physical differences between kernels with a vitreous and mealy appearance, hand-picked from grain of four winter wheat cultivars cultivated in Poland. Separated fractions were examined for protein content and composition, friabilin presence, carotenoids and total phenolic compounds content, specific kernel density, hardness, as well as kernel surface color. It was found that the ratio of vitreous kernels in the cultivars ranged from 39.18% to 76.28%. Vitreous kernels were darker, slightly heavier and harder than mealy kernels. Additionally, these kernels were more abundant in proteins (an average increase of 2.13%, with variation among cultivars from 0.71% to 2.89%). This type of kernels was also richer in phenolic compounds (on average by 4.02%) and less abundant in carotenoids (on average by 4.53%). Mealy (softer) kernels fractured to a finer flour.
Keywordsendosperm vitreousness mealiness gluten proteins kernel density hardness
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- Evers, A.D., Bechtel, D.B. 1988. Microscopic structure of the wheat grain. In: Pomeranz, Y. (ed.), Wheat: Chemistry and Technology. American Association of Cereal Chemists, Minnesota, USA, pp. 47–95.Google Scholar
- Farm Facts. 1997. Managing wheat for protein premium. Saskatchewan Agriculture and Food, http://www.agriculture.gov.sk.ca
- Greenblatt, G.A., Bettge, A.D., Morris, C.F. 1995. Relationship between endosperm texture and the occurrence of friabilin and bound polar lipids on wheat starch. Cereal Chem. 72:172–176.Google Scholar
- Klepacka, J., Fornal, L., Konopka, S., Choszcz, D. 2002. Relations between ferulic acid content in wheat coat, and milling quality and color of grain. Electronic J. of Polish Agricultural Universities 5:15, http://www.ejpau.media.pl/volume5/issue2/food/art-15.htmlGoogle Scholar
- Konopka, I., Kozirok, W., Tamska, M. 2005. Wheat endosperm hardness. Part I. Relationships to colour of kernel cross-section. Eur. Food Res. Technol. 220:11–19.Google Scholar
- Langer, M., Salmanowicz, B.P. 2009. Identification of puroindoline alleles in Polish wheat cultivars by molecular markers. Biul. IHAR 253:93–100.Google Scholar
- Lukow, O., Suchy, J., Adams, K., Brown, D., DePauw, R., Fox, S., Hatcher, D., Humphreys, G., McCaig, T., White, N. 2012. Effect of solar radiation, plant maturity and post-harvest treatment on the color and phenolic and carotenoids content in seed of red and white Canadian wheat. J. Cell Plant Sci. 3:1–13.Google Scholar
- Salmanowicz, B.P., Adamski, T., Surma, M., Kaczmarek, Z., Krystkowiak, K., Kuczymska, A., Banaszak, Z., Lugowska B., Majcher M., Obuchowski, W. 2012. The relationship between grain hardness, dough mixing parameters and bread-making quality in winter wheat. Int. J. Mol. Sci. 13:4186–4201.CrossRefGoogle Scholar
- Williams, P.C., Sobering, D.C. 1986. Attempts at standardization of hardness testing of wheat. I. The grinding/sieving (particle size index) method. Cereal Foods World 31:362–364.Google Scholar
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