1. Structural investigations on arabinogalactan-proteins from a lycophyte and different monilophytes (ferns) in the evolutionary context.
- Author
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Bartels, Desirée and Classen, Birgit
- Subjects
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ARABINOGALACTAN , *CHEMICAL structure , *LYCOPHYTES , *CRYPTOGAMS , *CLUB mosses , *CARBOHYDRATES - Abstract
Today, understanding of cell wall evolution is incomplete due to limited knowledge of cell wall structure of non-flowering plants. Besides polysaccharides, proteoglycans like arabinogalactan-proteins are important constituents of the cell wall of most if not all seed plants. This article provides the first detailed characterization of AGPs from a lycophyte and different ferns, which are the closest living relatives to seed plants. The amount of protein in fern AGPs (6–12%) was in a range comparable to most seed plant AGPs. However, it was higher for Lycopodium AGP (17%). The carbohydrate moieties of investigated AGPs showed typical features known for type-II arabinogalactans from seed plants and showed cross-reaction with polyclonal antibodies raised against Echinacea AGP. On the other hand, unusual structural components like high quantities of pyranosidic arabinose residues for Lycopodium AGP and 3- O -methyl-rhamnose for fern AGPs have been detected. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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