LIPIDS OF INONOTUS RHEADES (HYMENOCHAETACEAE): INFLUENCE OF SUBSTRATE AND LIGHT MODE ON FATTY ACID PROFILE OF MYCELIUM
Abstract
Controlled regulation of biosynthesis in higher fungi is currently an intensively developing field of the modern biotechnological industry. A promising object of such studies is the mycelial culture of Inonotus rheades (Pers.) P. Karst. Family Hymenochaetaceae has some biological activities that were previously shown by us. For the present study, the composition of fatty acids of I. rheades mycelium was firstly studied and 12 compounds including the dominant linoleic (C18:2 ω6) and palmitic acids (C16:0) were detected. It was found that the application of various substrates for the cultivation of I. rheades mycelium leads to changes in the quantitative composition of fatty acids. The use of Populus tremula wood resulted to an increase in the content of unsaturated fatty acids and decreasing of the concentration of unsaturated fatty acids comparing with mycelium grown on Betula pendula wood. The effect of the light mode on the fatty acid profile of I. rheades mycelium was characterized by a complex of changes in the chemical composition of lipids. Depending on the wavelength of the light used, both qualitative and quantitative changes were observed. The results of this studies showed that the substrate and the light mode affect on the composition of the fatty acids of I. rheades mycelium.
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