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Cell Walls of the Phycobionts Trebouxia and Pseudotrebouxia: Constituents and Their Localization*

Published online by Cambridge University Press:  28 March 2007

J. König  and
E. Peveling
E. Peveling
Affiliation:
Botanisches Institut der Westfälischen Wilhelms—Universität, Schloßgarten 3, D-4400 Münster, BRDGermany.
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Abstract

The cell wall composition of several species of the lichen phycobionts Trebouxia and Pseudotrebouxia has been investigated using gas chromatography, thin layer chromatography and infrared absorption spectrophotometry. In addition cell wall components (cellulose, non-cellulosic polysaccharides, sporopollenin, protein) were localized with cytochemical methods at the EM- level. The cell walls of Trebouxia and Pseudotrebouxia consist of several layers. In Trebouxia the inner layer (Si) consists mainly of cellulose, then followed by a non-cellulosic polysaccharide layer (S2), a sporopollenin-layer (S3) and an outer layer consisting again of a non-cellulosic polysaccharide (S4). In addition Trebouxia is surrounded by a sheath (a polysaccharide with species-specific terminal residues). In Pseudotrebouxia the cell wall is similarly constructed compared to Trebouxia, however, the sheath is lacking and the S4 layer contains a polysaccharide with species-specific terminal sugar residues. The role of the different cell wall constituents for the recognition mechanism between the lichen symbionts is discussed.

Type
Research Article
Information
The Lichenologist , Volume 16 , Issue 2 , June 1984 , pp. 129 - 144
Copyright
Copyright © British Lichen Society 1984

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Footnotes

*

Paper presented at the symposium ‘Symbiosis in Lichens’ (convener Margalith Galun) at the Third International Mycological Congress, Tokyo, September 1983.

References

* Paper presented at the symposium ‘Symbiosis in Lichens’ (convener Margalith Galun) at the Third International Mycological Congress, Tokyo, September 1983.