Phenology, TPC and size-fractioning phenolics variability in temperate Sargassaceae (Phaeophyceae, Fucales) from Western Brittany: Native versus introduced species

Lann, Klervi Le; Connan, Solène; Stiger‐Pouvreau, Valérie

doi:10.1016/j.marenvres.2012.05.011

Cited by 42 publications

(36 citation statements)

References 66 publications

(95 reference statements)

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“…These compounds are well known for their bioactivities such as antioxidant, antitumoral, antibacterial or photoprotectant [15][16][17] . It has been observed that phenolic contents fluctuate all along the year with values comprised between 1 and 6% of dry weight [17][18][19] . Previous studies showed that the biochemical composition of S. muticum can vary depending on geographic localization [20] .…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variation of Sargassum Muticum Biochemical Composition Determined by Fourier Transform Infra-Red Spectroscopy

Vandanjon¹,

Déniel²,

Puspita³

et al. 2017

JABST

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Proliferation of the introduced brown macro alga Sargassum muticum is known as a natural and hard to control phenomenon occurring along the Atlantic coasts. The phenomenon causes serious troubles for local ecosystems including the alteration of ecosystem structure, the reduction in indigenous biodiversity and economic losses (tourism, aquaculture). However, despite the serious troubles caused by S. muticum, this species contains highly remarkable bioactive metabolites. This macro alga is at present under-exploited and the valorization of its metabolites to give a positive value to this seaweed could be a solution of ecosystemic service. Biorefinery process could be one solution to valorize S. muticum. Comprehensive knowledge concerning the biochemical composition of S. muticum and the impact of environmental factors, particularly seasons, on its composition is a prerequisite before its valorization. In this study, the biochemical composition of S. muticum was evaluated by using classic colorimetric methods based on chemical analysis and Fourier Transform Infra-Red spectrometry (FTIR), and was used as a rapid and safe method that could bring advantages in screening studies and a more comprehensive management and use of seaweed products. Our results are globally in accordance, notably for phenolic compounds, showing the relevance of the use of infrared spectrometry. Moreover, based on the absorption bands of some specific and valuable compounds shown by FTIR, there was a seasonal variation in the polysaccharides, i.e., uronic acids and sulphated compounds, together with phenolic contents of S. muticum.

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Section: Introductionmentioning

confidence: 99%

Seasonal Variation of Sargassum Muticum Biochemical Composition Determined by Fourier Transform Infra-Red Spectroscopy

Vandanjon¹,

Déniel²,

Puspita³

et al. 2017

JABST

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“…Their chemical structure is based on aryl-aryl and/or diaryl ether linkages of phloroglucinol (1,3,5-trihydroxybenzene) units and is rather complex. Polymerization processes lead to a wide range of molecular sizes generally between 10 and 100 kD (Boettcher and Targett, 1993;McClintock and Baker, 2001;Le Lann et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Numerous dehydro-oligomers of phloroglucinol (fucols, fuhalols, phlorethols, fucophloretols, and eckols) have been characterized by chemical analyses in the three past decades (Figure 1) and are essentially from Fucales (Ascophyllum, Fucus, and Sargassum species) and Laminariales (Ecklonia and Eisenia species) (Ragan and Glombitza, 1986;Amsler and Fairhead, 2006;Le Lann et al, 2012). These compounds, which can represent up to 25% dry weight, are found as soluble forms in cellular compartments (Amsler and Fairhead, 2006), as insoluble forms cross-linked to cell walls (Koivikko et al, 2005(Koivikko et al, , 2007, and in extracellular exudates (Shibata et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Structure/Function Analysis of a Type III Polyketide Synthase in the Brown Alga Ectocarpus siliculosus Reveals a Biochemical Pathway in Phlorotannin Monomer Biosynthesis

et al. 2013

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ORCID ID: 0000-0001-7358-6282 (P.P.).Brown algal phlorotannins are structural analogs of condensed tannins in terrestrial plants and, like plant phenols, they have numerous biological functions. Despite their importance in brown algae, phlorotannin biosynthetic pathways have been poorly characterized at the molecular level. We found that a predicted type III polyketide synthase in the genome of the brown alga Ectocarpus siliculosus, PKS1, catalyzes a major step in the biosynthetic pathway of phlorotannins (i.e., the synthesis of phloroglucinol monomers from malonyl-CoA). The crystal structure of PKS1 at 2.85-Å resolution provided a good quality electron density map showing a modified Cys residue, likely connected to a long chain acyl group. An additional pocket not found in other known type III PKSs contains a reaction product that might correspond to a phloroglucinol precursor. In vivo, we also found a positive correlation between the phloroglucinol content and the PKS III gene expression level in cells of a strain of Ectocarpus adapted to freshwater during its reacclimation to seawater. The evolution of the type III PKS gene family in Stramenopiles suggests a lateral gene transfer event from an actinobacterium.

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“…12,21 Variations in reported TPC among brown algae are partly attributed to differences in the methods used both in sample preparation and phenol extraction, since different solvents vary in their extraction efficiency. 20,22,23 As we used the same method in this interspecific analysis of TPC, differences can be attributed to other factors such as thallus morphology, life cycle, bathymetric level and grazing pressure.…”

Section: Discussionmentioning

confidence: 99%

“…bathymetric gradients, sea surface temperature, photosynthetically active radiation levels, UV radiation and salinity), but also in relation to geography and reef morphology. 6,10,12,13 In the Mediterranean Sea, essentially a tideless sea, seaweeds inhabiting the infralittoral fringe, characterized by regular emersion as a result of wave movements, experience harsher environmental stress conditions (e.g. partial desiccation and higher irradiances) than those living in the infralittoral zone, constantly submerged.…”

Section: Introductionmentioning

confidence: 99%

Interspecific variation in total phenolic content in temperate brown algae

Mannino¹,

Vaglica²,

Oddo³

2017

J Biol Res

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Marine algae synthesize secondary metabolites such as polyphenols that function as defense and protection mechanisms. Among brown algae, Fucales and Dictyotales (Phaeophyceae) contain the highest levels of phenolic compounds, mainly phlorotannins, that play multiple roles. Four temperate brown algae (Cystoseira amentacea, Cystoseira compressa, Dictyopteris polypodioides and Padina pavonica) were studied for total phenolic contents. Total phenolic content was determined colorimetrically with the Folin-Ciocalteu reagent. Significant differences in total phenolic content were observed between leathery and sheetlike algae and also within each morphological group. Among the four species, the sheet-like alga D. polypodioides, living in the upper infralittoral zone, showed the highest concentration of phenolic compounds. These results are in agreement with the hypothesis that total phenolic content in temperate brown algae is influenced by a combination of several factors, such as growth form, depth, and exposition to solar radiation.

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Phenology, TPC and size-fractioning phenolics variability in temperate Sargassaceae (Phaeophyceae, Fucales) from Western Brittany: Native versus introduced species

Cited by 42 publications

References 66 publications

Seasonal Variation of Sargassum Muticum Biochemical Composition Determined by Fourier Transform Infra-Red Spectroscopy

Seasonal Variation of Sargassum Muticum Biochemical Composition Determined by Fourier Transform Infra-Red Spectroscopy

Structure/Function Analysis of a Type III Polyketide Synthase in the Brown Alga Ectocarpus siliculosus Reveals a Biochemical Pathway in Phlorotannin Monomer Biosynthesis

Interspecific variation in total phenolic content in temperate brown algae

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