Development of nutrient medium for riboflavin biosynthesis by Eremothecium ashbyi ascomycetes
DOI:
https://doi.org/10.15587/2706-5448.2021.247266Keywords:
riboflavin producer, Eremothecium ashbyi F-340, submerged cultivation, agricultural waste, sunflower cakeAbstract
The object of the study is the riboflavin producer Eremothecium ashbyi Guilliermond 1935 VKPM F-340, the subject of the study is the regularities of riboflavin biosynthesis by the E. ashbyi F-340 strain under different cultivation conditions. Riboflavin is an important micronutrient that is a precursor of the coenzymes flavin mononucleotide and flavinadine dinucleotide, it is necessary for biochemical reactions in all living cells. Population growth and an increase in human needs for vitamin-fortified food and agricultural products is the reason for an increase in demand for riboflavin preparations. Considering this, it is important and economically beneficial to improve the technology for the production of vitamin B2. An important factor that affects the yield of the product is the nutrient medium. At present, the influence of agricultural waste on the biosynthesis of riboflavin is being actively studied in the world. However, not all of the studied types of raw materials are typical for the agriculture of this or that country. Therefore, in order to determine whether this direction of research is promising, it is important to check the effect on the biosynthetic activity of the riboflavin producer of the most common wastes of the domestic industry. In this work, this is done on the example of Ukraine.
In the course of the study, microbiological (surface and deep cultivation of E. ashbyi F-340), physicochemical (determination of the amount of biomass by the gravimetric method, determination of the concentration of riboflavin by the spectrophotometric method) and mathematical methods were used. The proposed media with the addition of agricultural waste, providing a higher yield of riboflavin compared to conventional media. The influence of different types of agricultural waste on the biosynthesis of riboflavin by the producer E. ashbyi F-340 was evaluated. The efficiency of using sunflower cake as a component of the nutrient medium is shown. The optimal sources of carbon for the nutrient medium with oil cake have been determined, which increases the yield of riboflavin. Due to the large amount of sunflower cake obtained in Ukraine, its use for modifying the nutrient medium in order to increase the yield of riboflavin in the future will lead to a decrease in the cost of the target product due to the use of cheap and ecological raw materials.
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Copyright (c) 2021 Nataliia Stetsenko, Valentyna Polishchuk, Оlexiy Dugan
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