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

Cell Wall Composition of the Generic Phase of Bangia atropurpurea (Rhodophyta) 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. Introducrion Marine algae possess a wide variety of economically important polysaccharides. Polysaccharides of the Rhodophyta, in addition to their commercial value, also have been used in studies on the chemistry and structure of polymer gels (Rees 1969, Morris et 1980) and for assessment of taxonomic http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Botanica Marina de Gruyter

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

Botanica Marina, Volume 25 (11) – Jan 1, 1982

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Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0006-8055
eISSN
1437-4323
DOI
10.1515/botm.1982.25.11.529
Publisher site
See Article on Publisher Site

Abstract

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. Introducrion Marine algae possess a wide variety of economically important polysaccharides. Polysaccharides of the Rhodophyta, in addition to their commercial value, also have been used in studies on the chemistry and structure of polymer gels (Rees 1969, Morris et 1980) and for assessment of taxonomic

Journal

Botanica Marinade Gruyter

Published: Jan 1, 1982

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