Dynamics of macronutrients during short-term germination of flax seeds

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Abstract: Germination is an environmentally friendly and convenient approach to enhancing the biochemical potential of food plant raw materials. The nutritional value of raw materials and the functional properties of protein contained therein can be significantly improved by activatying the inherent enzyme system. Bioactivation not only increases the amount of water-soluble protein fractions, but also promotes accumulation of free amino and fatty acids and easily soluble reducing sugars. We used flax seeds as a source of essential polyunsaturated fatty acids, dietary fibres, complete protein, polypeptides and lignans to support the most important physiological functions of the human body. The aim was to study the dynamics of macronutrients in the process of short-term germination of flax seeds by chemical and spectroscopic methods. Flax seeds were germinated in laboratory conditions in special trays at a temperature of 18–20 ºС for 5 days with periodic moistening. Visual changes occurring in flax seeds at all stages of short-term germination are demonstrated. The periodicity of changes in the main macronutrients of flax seeds is shown. It is concluded that, during the studied period of germination, the principal hydrolytic decomposition of seed storage proteins was incomplete, leading to a permanent decrease, first of all, in the content of proteins and protein nitrogen. Based on the changes in the lipid content and acid number, the intensity of the peaks associated with functional groups in the lipid region, in particular, the band at 1748 cm-1 assigned to stretching vibrations of C=Ogroups of fatty acids, no degradation of storage lipids at an early stage of germination was assumed. The accumulation of soluble substances during the studied germination period is demonstrated, including watersoluble protein compounds, as well as water-soluble polysaccharides and products of their hydrolytic degradation. Sprouted flax seeds are a valuable ingredient for producing healthy foods.

About the authors

I. E. Minevich

Federal Scientific Center for Fiber Crops

Email: irina_minevich@mail.ru

A. P. Nechiporenko

National Research University of Information Technology, Mechanics and Optic

Email: allanech2512@yandex.ru

A. A. Goncharova

Federal Scientific Center for Fiber Crops

Email: a.goncharova@fnclk.ru

V. E. Sitnikova

Email: kresenka@gmail.com

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