Structural studies on the porphyran from porphyra columbina (Montagne)

Villarroel, Luís; Zanlungo, Alberto B.

doi:10.1016/s0008-6215(00)84608-x

Cited by 19 publications

(11 citation statements)

References 20 publications

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“…Hot-water soluble components of the cell walls of B. atropurpurea accounted for approximately 18% of the total wall weight (Table IV). When compared to values of 15-32% for the total hot-water soluble fraction isolated from thalli ofPorphyra capensis and/*, cokimbina von Holdt 1957, Villarroel andZanlunge 1981), it is evident that much of the original hot-water soluble material of B. atropurpurea cell walls is retained following the wall Isolation procedure.…”

Section: Discussionmentioning

confidence: 95%

Cell Wall Composition of the Generic Phase of Bangia atropurpurea (Rhodophyta)

Gretz

Sommerfeld²,

Aronson

1982

Botanica Marina

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Mechanically isolated cell walls were prepared from the generic phase of Bangia atropurpurea and chemically characterized. Electron microscopic examination of cell wall preparations revealed them to be morphologically similar to walls of whole thalli and free from protoplasmic contamination. The chemical composition of over 92% of the total wall weight was determined and polysaccharides were the major wall components (72% of wall weight). Mannan (at least part of which is 0-1,4-linked) and a water soluble galactan fraction consisting of both D-and L-galactose residues in a ratio of l: 1.1 represents a large proportion of the carbohydrate content of isolated cell walls. In addition, 3,6-anhydrogalactose is probably associated with the water-soluble galactoses. The presence of cellulose could not be demonstrated. Protein was a significant wall component (10.6% of total wall weight) and consisted of at least 16 aminoacids, including hydroxyproline (0.3% of wall weight). Walls also contained 8.4% lipid and l .4% ash.

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Section: Discussionmentioning

confidence: 95%

Cell Wall Composition of the Generic Phase of Bangia atropurpurea (Rhodophyta)

Gretz

Sommerfeld²,

Aronson

1982

Botanica Marina

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“…This approach was used for the structural analysis of sulfated galactans isolated from many red seaweeds and other papers cited above; Villarroel and Zanlungo 1981;Brasch et al 1983). However, in order to obtain additional structural Information, it is necessary to assign all the signals in 13 C-NMR spectra.…”

Section: Pmr Spectramentioning

confidence: 99%

NMR Spectroscopy of Red Seaweed Polysaccharides: Agars, Carrageenans, and Xylans

Усов¹

1984

Botm

122

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NMR spectroscopy is a powerful tool for structural analysis of polysaccharides permitting rapid and reliable identification of the known structures or discovery of new structural features without Splitting the polymeric molecules. Application of this method, mainly -and 13 C-NMR spectroscopy, for investigation of red seaweed polysaccharides is reviewed, including the elucidation of primary structures of sulfated galactans and neutral xylans, äs well äs the conformational study of galactan molecules in Solutions and gels.

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“…Percival et al [11] by sequential extraction of Lessonia nigrescens obtained fucans with low content of sulfate groups (6-13%) and with considerable amounts of uronic acid (9-29%). On the other hand, Lessonia flavicans afforded a fucan devoid of uronic acid with 35.5% of sulfate groups [12]. Extraction with acid of Lessonia trabeculata gave a mixture of fucans, which was fractionated by ion-exchange chromatography.…”

Section: Introductionmentioning

confidence: 99%