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  • Title: Linkage structure of cell-wall polysaccharides from three duckweed species.
    Author: Sowinski EE, Gilbert S, Lam E, Carpita NC.
    Journal: Carbohydr Polym; 2019 Nov 01; 223():115119. PubMed ID: 31426999.
    Abstract:
    Rapid growth and easily digestible walls that are naturally low in lignin make the aquatic plant family Lemnaceae, or duckweed, a promising feedstock for biofuel production. Monosaccharide and linkage analysis of cell walls from three species of duckweed: Spirodela polyrhiza, Lemna gibba, and Wolffia australiana showed that apiogalacturonans and/or xylogalacturonans, and smaller amounts of rhamnogalacturonan I, constituted 57%, 51% and 48% of their respective wall mass. Hemicellulosic xylan, xyloglucan, and glucomannan made up lesser amounts wall mass across the three species. Apiose residues were either non-reducing terminal or 3'-linked, but their ratios varied substantially from nearly 1:1 for S. polyrhiza and 2:1 for L. gibba, to 10:1 for W. australiana. These findings will help guide future research to design efficient strategies for disassembly of duckweed cell walls into sugars and uronic acids for conversion of duckweed biomass into usable fuel, and to facilitate extraction of other bioproducts from its polysaccharides.
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