Chemical variation in the tropical seaweed Stypopodium zonale (dictyotaceae)

Gerwick, William H.

doi:10.1016/s0031-9422(00)81115-2

Cited by 55 publications

(30 citation statements)

References 5 publications

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“…The genus Stypopodium is characterized by its ability to produce diterpenes and prenylated hydroquinones (GERWICK;FENICAL ;NORRIS, 1985). According to Van Heemst et al (1996), aquil phenols have also been found between the components of S. muticum, datum in accordance with the positive reaction with ferric chloride observed in this study.…”

Section: Resultssupporting

confidence: 85%

Evaluation of antifungal activity of seaweed extracts

et al. 2012

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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.Index terms: Etanolic extract, Colletotrichum lagenarium, Aspergillus flavus. RESUMOAs macroalgas marinhas, por estarem sujeitas a numerosas interações biológicas e, por vezes, a condições abióticas extremas, desenvolveram, entre outros mecanismos de defesa, a capacidade de produzir substâncias biologicamente ativas. Assim, esses organismos produzem, principalmente, terpenos e fenóis. Entre outras, a atividade antifúngica, por sua importância na saúde humana e animal e na preservação de produtos agrícolas, tem sido objeto de diversos estudos. No presente trabalho, esta atividade foi investigada em dez extratos de macroalgas marinhas, por ensaios de bioautografia direta, frente ao fungo Colletotrichum lagenarium e por ensaio de difusão em disco, frente ao Aspergillus flavus.

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Section: Resultssupporting

confidence: 85%

Evaluation of antifungal activity of seaweed extracts

et al. 2012

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“…We successfully detected ten phenolic compounds (1 -10) out of the separated 21 (Fig. 3), and this quantitative variation may be due to differences in geographical locations [33,34]. Compounds (1 -10) were identified by comparison of their retention times, UV-Vis spectra, and by coinjections with standards (Figs.…”

Section: Methods Development For Separation Of Compoundsmentioning

confidence: 99%

Development and validation of an RP‐HPLC method for quantitative determination of vanillin and related phenolic compounds in Vanilla planifolia

Sinha¹,

Verma

Sharma

2007

J of Separation Science

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A simple and fast method was developed using RP-HPLC for separation and quantitative determination of vanillin and related phenolic compounds in ethanolic extract of pods of Vanilla planifolia. Ten phenolic compounds, namely 4-hydroxybenzyl alcohol, vanillyl alcohol, 3,4-dihydroxybenzaldehyde, 4-hydroxybenzoic acid, vanillic acid, 4-hydroxybenzaldehyde, vanillin, p-coumaric acid, ferulic acid, and piperonal were quantitatively determined using ACN, methanol, and 0.2% acetic acid in water as a mobile phase with a gradient elution mode. The method showed good linearity, high precision, and good recovery of compounds of interest. The present method would be useful for analytical research and for routine analysis of vanilla extracts for their quality control.

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“…118 " 119 Shallow and deep water populations of the brown alga Stypopodium zonale produced different secondary metabolites. 120 The red alga Portieria hornemanni is well known to vary in its composition of halogenated monoterpenes among different collection sites in the tropical Pacific; 91 ' 121 this variation does not appear to be environmentally mediated. 92 Different chemotypes of Laurencia nipponica were shown to be genetically distinct based on results of intra-and interpopulational crosses between female and male gametophytes in laboratory culture studies.…”

Section: Macroalgaementioning

confidence: 99%