Evaluation of antifungal activity of seaweed extracts

Ciência e Agrotecnologia

Julio Cesar Fernandes Peres²  Luciana Retz De Carvalho¹  Edlayne Gonçalez²  Luis Otávio Saggion Berian²  Joana D´arc Felicio¹ 

[1] ,Instituto Biológico de São PauloSão Paulo SP ,Brasil

关键词: Etanolic extract;    Colletotrichum lagenarium;    Aspergillus flavus;    Extrato etanólico;    Colletotrichum lagenarium;    Aspergillus flavus;   

DOI  :  10.1590/S1413-70542012000300004

来源: SciELO

【 摘 要 】

Seaweeds are subject to numerous biological interactions and sometimes to extreme abiotic conditions, so they have developed among other defense mechanisms, the ability to produce biologically active substances. Thus, these organisms produce mainly terpenes and phenols. Among others, the antifungal activity, due to its importance in human and animal health and the production of agricultural products, has been the subject of several studies. In the present work, this activity was investigated in ten seaweeds extracts, by direct bioautography assays, compared to Colletotrichum lagenarium and disk diffusion assay, compared to Aspergillus flavus. The organisms studied were: Stypopodium zonale, Laurencia dendroidea, Ascophyllum nodosum, Sargassum muticum, Pelvetia canaliculata, Fucus spiralis, Sargassum filipendula, Sargassum stenophyllum, Laminaria hyperborea and Gracilaria edulis. S. zonale, L. dendroidea, P. canaliculata, S. muticum, A. nodosum and F. spiralis extracts significantly inhibited the C. lagenarium growth, but not inhibited significantly the A. flavus growth. The presence of terpenes in all of these extracts was confirmed by thin layer chromatography whereas the presence of phenolic compounds was confirmed only in extracts of P. canaliculata, A. nodosum and S. muticum. In chemical study by column chromatography, followed by gas chromatography/mass spectrometry analysis, the terpenes neophytadiene, cartilagineol, obtusol elatol; and the ester ethyl hexadecanoate were identified in the L. dendroidea extract. This is the first report on the activity of seaweed extracts against C. lagenarium, a fungus bearing agricultural importance.

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