Comparative Study of Polysaccharides from Reproductive and Sterile Tissues of Five Brown Seaweeds

Скрипцова, А. В.; Шевченко, Н. М.; Tarbeeva, Daria V.; Zvyagintseva, T. N.

doi:10.1007/s10126-011-9413-4

Cited by 78 publications

(46 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This could suggest that kelps from some sites are better suited for long-distance rafting than those from other sites. In future studies it would be interesting to study other components that could possibly have an impact on gamete survival during rafting dispersal, such as carbohydrates or proteins, which might differ between sexes (Jones 1957) and sexual stages (Skriptsova et al 2012). …”

Section: Biochemical Compositionmentioning

confidence: 99%

No sex-related dispersal limitation in a dioecious, oceanic long-distance traveller: the bull kelp Durvillaea antarctica

Lizée-Prynne¹,

López²,

Tala³

et al. 2016

Botanica Marina

View full text Add to dashboard Cite

Dispersal of dioecious floating seaweeds could be limited due to biological constraints. This study examined for benthic and floating populations (stranded individuals) of the rafting kelp Durvillaea antarctica whether male and female individuals cohabit within one holdfast. As a previous study had indicated colour differences between sexes, we also examined whether these colour differences are consistent and possibly related to pigment and phlorotannin concentrations. Our large-scale survey of rafted holdfasts and a small-scale survey of benthic holdfasts at two sites found that reproductive males and females do travel together in coalesced holdfasts, although this proportion is relatively low (5-17%). There were no sex-specific differences in pigment and phlorotannin concentrations, but there were significant differences between the two benthic populations. There was no relationship between the colouration of thalli and the concentration of pigments but there was a slight colour difference between vegetative and reproductive sexual stages. Based on these results we conclude that biological conditions are not the cause for the lack of genetic connectivity between D. antarctica populations from central Chile. Instead, we suggest that ecological processes, such as density-blocking and physical factors (i.e. currents and winds), limit the potential for successful rafting dispersal.

show abstract

Section: Biochemical Compositionmentioning

confidence: 99%

No sex-related dispersal limitation in a dioecious, oceanic long-distance traveller: the bull kelp Durvillaea antarctica

Lizée-Prynne¹,

López²,

Tala³

et al. 2016

Botanica Marina

View full text Add to dashboard Cite

show abstract

“…The polysaccharide compositions of algae of the genus Sargassum may have differed because the specimens were collected at different locations and life stages [13,14,15] and because different extraction methods were used [16]. …”

Section: Introductionmentioning

confidence: 99%

Structural Characteristics and Anticancer Activity of Fucoidan from the Brown Alga Sargassum mcclurei

et al. 2013

View full text Add to dashboard Cite

Three different fucoidan fractions were isolated and purified from the brown alga, Sargassum mcclurei. The SmF1 and SmF2 fucoidans are sulfated heteropolysaccharides that contain fucose, galactose, mannose, xylose and glucose. The SmF3 fucoidan is highly sulfated (35%) galactofucan, and the main chain of the polysaccharide contains a →3)-α-l-Fucp(2,4SO3−)-(1→3)-α-l-Fucp(2,4SO3−)-(1→ motif with 1,4-linked 3-sulfated α-l-Fucp inserts and 6-linked galactose on reducing end. Possible branching points include the 1,2,6- or 1,3,6-linked galactose and/or 1,3,4-linked fucose residues that could be glycosylated with terminal β-d-Galp residues or chains of alternating sulfated 1,3-linked α-l-Fucp and 1,4-linked β-d-Galp residues, which have been identified in galactofucans for the first time. Both α-l-Fucp and β-d-Galp residues are sulfated at C-2 and/or C-4 (and some C-6 of β-d-Galp) and potentially the C-3 of terminal β-d-Galp, 1,4-linked β-d-Galp and 1,4-linked α-l-Fucp residues. All fucoidans fractions were less cytotoxic and displayed colony formation inhibition in colon cancer DLD-1 cells. Therefore, these fucoidan fractions are potential antitumor agents.

show abstract

“…Algal fucoidans are highly heterogeneous in structure, oppositely to the fucan sulfates from marine invertebrates, which are composed mainly of sulfated l -fucose and present a more simple and regular structure. Fucoidans may differ considerably in composition, molecular mass and structure, depending on the algal species considered [3], geographic location, environmental conditions, harvest season, vegetative and generative life-stages [4] or on the type of tissues sampled [5]. On the other hand, the extraction and purification conditions may affect the polysaccharide composition and structure of the isolated compounds (including charge density, distribution, degree of sulfation, molecular mass and linkage pattern) [6,7].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Extraction and Depolymerization of Fucoidan from Sargassum muticum in Aqueous Media

et al. 2013

View full text Add to dashboard Cite

The biomass components of the invasive seaweed Sargassum muticum were fractionated to allow their separate valorization. S. muticum (Sm) and the solid residue remaining after alginate extraction of this seaweed (AESm) were processed with hot, compressed water (hydrothermal processing) to assess the effects of temperature on fucoidan solubilization. Fucose-containing oligosaccharides were identified as reaction products. Operating under optimal conditions (170 °C), up to 62 and 85 wt% of the dry mass of Sm and AESm were solubilized, respectively. The reaction media were subjected to precipitation, nanofiltration and freeze-drying. The dried products contained 50% and 85% of the fucoidan present in Sm and AESm, respectively; together with other components such as phenolics and inorganic components. The saccharidic fraction, accounting for up to 35% of the dried extracts, contained fucose as the main sugar, and also galactose, xylose, glucose and mannose. The concentrates were characterized for antioxidant activity using the TEAC assay.

show abstract

Comparative Study of Polysaccharides from Reproductive and Sterile Tissues of Five Brown Seaweeds

Cited by 78 publications

References 28 publications

No sex-related dispersal limitation in a dioecious, oceanic long-distance traveller: the bull kelp Durvillaea antarctica

No sex-related dispersal limitation in a dioecious, oceanic long-distance traveller: the bull kelp Durvillaea antarctica

Structural Characteristics and Anticancer Activity of Fucoidan from the Brown Alga Sargassum mcclurei

Simultaneous Extraction and Depolymerization of Fucoidan from Sargassum muticum in Aqueous Media

Contact Info

Product

Resources

About