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This study aimed to determine the antimicrobial activity of culture fluid and mycelial mass of selected Hericium strains from the IBK Mushroom Culture Collection (Kyiv, Ukraine) against bacteria and fungi, as well as to evaluate the potential of these mushrooms for biomass and extracellular polysaccharides production.

The majority of research programs had been focused on extract from the fruiting body. However, fungal mycelium obtained by submerged cultivation also has higher pharmacological potential. The aim of this study was investigation of the antioxidant and antimicrobial potential of Ganoderma lucidum and Trametes versicolor fungal mycelium biomass obtained by submerged cultivation and liquid fluid.

Biometric characteristics of the hyphae and micromorphological features of Hohenbuehelia myxotricha mycelia, such as clamps, hyphal loops, crystals were observed by light and electron microscopy. The basic requirements for H. myxotricha growth and acquisition of antimycotic activity have been investigated. The highest mycelial growth (18.2 mm/day) of H. myxotricha was observed on beer wort agar medium. Suitable conditions for maximal H. myxotricha mycelia production were found after 14 days of liquid static cultivation at 25°C, pH 4.5, 30 g/L of glucose, and 2 g/L of yeast extract. The inhibitory effect of H. myxotricha was evaluated against Aspergillus niger, Issatchenkia orientalis, and Candida albicans strains. The optimal period for A. niger growth inhibition was 14 days while 21 days of H. myxotricha cultivation was more appropriated for tested Saccharomycetales growth inhibitions. The most suitable for promotion of antimycotic metabolites against all tested pathogenic fungi were glucose and yeast extract. [ABSTRACT FROM AUTHOR]