Abstract
This study characterizes the cell wall hemicellulose and pectins polymers of Retama raetam. This species develops a particularly important root system and is adapted to arid areas. The cellulose, hemicelluloses and pectins were extracted. The cellulose remains the major component of the wall (27% for young roots and 80% for adult roots), hemicelluloses (14.3% for young roots and 3.6% for adult roots) and pectins (17.3% for young roots and 4.1% for adult roots). The monosaccharidic composition of water soluble extracts determined by gas liquid chromatography (GLC) and completed by infrared (FTIR) spectroscopy of hemicellulosic shows the presence of xylose as a major monosaccharide in the non-cellulose polysaccharides (47.8% for young roots and 59.5% for adult roots). These results indicate the presence of the homogalacturonans and rhamnogalacturonans in pectin. This study constitutes the preliminary data obtained in the biochemical analysis of the parietal compounds of the roots of a species which grows in an arid area in comparison with those of its aerial parts. Key words: Retama raetam, roots, cell wall, investigation, polysaccharides, monosaccharidic.
Highlights
The cell wall compartment is the subject of many studies because of the important roles that it plays in the vegetal cell
The monosaccharidic composition of water soluble extracts determined by gas liquid chromatography (GLC) and completed by infrared (FTIR) spectroscopy of hemicellulosic shows the presence of xylose as a major monosaccharide in the non-cellulose polysaccharides (47.8% for young roots and 59.5% for adult roots)
The OE fractions was represented as 7.6% against 9.7% for young roots and 1.5% against 2.6% for adult roots expressed in percentage dry mass
Summary
The cell wall compartment is the subject of many studies because of the important roles that it plays in the vegetal cell (growth, protection, defence against the phyto pathogenes). The components of the cell wall are subjected to applied research since they constitute 80% of the vegetal biomass (Robert and Roland, 1989). The structural diversity of plant cell wall polysaccharides has brought lots of application in many diverse domains.
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