Journal
CARBOHYDRATE POLYMERS
Volume 172, Issue -, Pages 342-351Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.05.031
Keywords
Lycophyte; Fern; Plant cell wall; Arabinogalactan-protein; 3-O-methyl-rhamnose; Pyranosidic arabinose
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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. (C) 2017 Elsevier Ltd. All rights reserved.
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