Isolation and Identification of Antifungal Substances from “Akagusare”-infected Laver Porphyra sp.

Abstract

The antifungal substances effective against “akagusare”-infected Porphyra sp. were isolated by gas liquid chromatography equipped with a preparative apparatus. After being methylated, those substances were analyzed by gas chromatography-mass spectrometry. The data obtained, together with their infrared spectra, indicated that they are phenylacetic acid, unsaturated fatty acids such as octenoic, nonenoic, and nonedienoic acids, and saturated fatty acids such as nomnanoic and heptanoic acids. The antifungal substances in F-1 one of the organic acid fractions, showed much higher levels in the infected and the recovered laver than in the normal laver.