Journal
CARBOHYDRATE POLYMERS
Volume 111, Issue -, Pages 410-418Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.04.079
Keywords
Duckweed; Lemna minor; Cell-wall polysaccharides; Fractionation; Chemical analysis
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Funding
- UK Biotechnology and Biological Sciences Research Council [BB/J004545/1]
- BBSRC [BBS/E/F/00044476] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BBS/E/F/00044476] Funding Source: researchfish
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Duckweed is potentially an ideal biofuel feedstock due to its high proportion of cellulose and starch and low lignin content. However, there is little detailed information on the composition and structure of duckweed cell walls relevant to optimising the conversion of duckweed biomass to ethanol and other biorefinery products. This study reports that, for the variety and batch evaluated, carbohydrates constitute 51.2% (w/w) of dry matter while starch accounts for 19.9%. This study, for the first time, analyses duckweed cell wall composition through a detailed sequential extraction. The cell wall is rich in cellulose and also contains 20.3% pectin comprising galacturonan, xylogalacturonan, rhamnogalacturonan; 3.5% hemicellulose comprising xyloglucan and xylan, and 0.03% phenolics. In addition, essential fatty acids (0.6%, alpha-linolenic and linoleic/linoelaidic acid) and p-coumaric acid (0.015%) respectively are the most abundant fatty acids and phenolics in whole duckweed. (C) 2014 Elsevier Ltd. All rights reserved.
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