Isolation, antimicrobial activity, and metabolites of fungus Cladosporium sp. associated with red alga Porphyra yezoensis.

Current Microbiology
Ling DingHartmut Laatsch

Abstract

Cladosporium sp. isolate N5 was isolated as a dominant fungus from the healthy conchocelis of Porphyra yezoensis. In the re-infection test, it did not cause any pathogenic symptoms in the alga. Twenty-one cultural conditions were chosen to test its antimicrobial activity in order to obtain the best condition for large-scale fermentation. Phenylacetic acid, p-hydroxyphenylethyl alcohol, and L-beta-phenyllactic acid were isolated from the crude extract as strong antimicrobial compounds and they are the first reported secondary metabolites for the genus Cladosporium. In addition, the Cladosporium sp. produced the reported Porphyra yezoensis growth regulators phenylacetic acid and p-hydroxyphenylacetic acid. No cytotoxicity was found in the brine shrimp lethality test, which indicated that the environmental-friendly Cladosporium sp. could be used as a potential biocontrol agent to protect the alga from pathogens.

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Citations

Mar 26, 2016·Journal of the Science of Food and Agriculture·Yingchang LiJianrong Li
Apr 17, 2018·The Plant Journal : for Cell and Molecular Biology·Nanna BjarnholtBirger Lindberg Møller
Jan 9, 2021·International Journal of Systematic and Evolutionary Microbiology·Tânia F L VicenteArtur Alves

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