Abstract
AbstractThe effect of the distribution of free and esterified fatty acids, including triterpenes and sterols, on the mycelial growth of the basidiomycete Inonotus obliquus (Pers. ex Fr.) Pilat in malt extract and solid supplemented mineral media was investigated. The amino acids DL‐alanine. DL‐aspartic acid, L‐glutamic acid, L‐leucine, L‐methionine, and L‐serine were added to the cultures at nitrogen concentrations of 0.1, 0.5 and 0.9 g/l, respectively. Differences in the average mycelial growth were distinct at concentrations of 0.5 g/l and 0.9 g/l. L‐Methionine had the highest inhibitory effect on growth. At all concentrations, the amino acids reduced the production of lanosterol. The other identified triterpenes were inotodiol, 3β,hydroxy‐lanosta‐8,24‐dien‐21‐al, 3β,21‐dihydroxy‐lanosta‐8,24‐diene, trametenolic acid, and ergosterol peroxide. The main fatty acids were either C 16:0 or C 18:2 both free or in glycerides.
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