Polysaccharides from the roots of the marsh mallow (Althaea officinalis L.): Structure of an arabinan

Capek, Peter; Toman, Rudolf; Kardošová, Alžbeta; Rosík, J.

doi:10.1016/0008-6215(83)88082-3

Cited by 74 publications

(28 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multiple signals are observed for all carbons suggesting that the arabinan is highly branched. Similar chemical-shift ranges have been reported (Capmek et al 1983) for the Several signals which could not be attributed to the arabinosyl residues were also present in the 13C spectrum of the summer sample: 62.3, 62.7, 64.1, 68.5, 70.2, 71.4, 73.8 and 78.5 ppm. However, the chemical shifts of almost all of the signals in the anomeric region of the carbon spectrum are near 109 ppm.…”

Section: Composition Of the Pectins Extracted From Bark Tissuessupporting

confidence: 78%

Pectin changes in samples containing poplar cambium and inner bark in relation to the seasonal cycle

Baier

Goldberg

Catesson

et al. 1994

Planta

View full text Add to dashboard Cite

Abstract. Biochemical changes occurring during the transition between meristematic activity and rest were studied in samples containing cambial cells and their phloem derivatives from Populus x euramericana. Uronic acids represented around 9% of the cell-wall dry matter in spring and 7% in summer and winter. In contrast, a higher content of methylated galacturonic acids was observed during the rest period. The degree of esterification increased from 2% in spring to 35% in winter, indicating an important accumulation of acidic pectins during the active season although the cation content was always very low. Nuclear magnetic resonance spectroscopy of neutral polysaccharides solubilized with boiling water showed that in winter arabinans and xylans were the main carbohydrates. By contrast, in spring and in summer the xylans were very scarce, arabinans being the major neutral polysaccharide, indicating that important modifications occur during the autumn. Histochemical observations of material treated with hot water and EDTA confirmed the low relative pectin content during the rest period. Calcium ions, detected as antimonate salt were scarce. In the cambium, they were located mainly in cell junctions whereas in phloem derivatives these cations were distributed throughout the whole cell wall.

show abstract

Section: Composition Of the Pectins Extracted From Bark Tissuessupporting

confidence: 78%

Pectin changes in samples containing poplar cambium and inner bark in relation to the seasonal cycle

Baier

Goldberg

Catesson

et al. 1994

Planta

View full text Add to dashboard Cite

show abstract

“…Some polysaccharides extracted from the leaves of A. officinalis, in particular glucuronoxylans, showed high antioxidant activity evaluated by their ability to inhibit peroxidation of soyabean lecithin liposomes by OH • radicals [22]. Polysaccharides extracted from the root of A. officinalis are mainly D-glucans, rhamnogalacturonan and arabinans [23,24]. However, a previous study reported the weak antioxidant activity of glucans [25].…”

Section: Abts Radical Cation Scavenging Assaymentioning

confidence: 84%

Influence of the extraction solvent on antioxidant activity of Althaea officinalis L. root extracts

et al. 2013

View full text Add to dashboard Cite

Althaea officinalis (Malvaceae) is a well-known plant that is widely distributed throughout the world. Aqueous and hydroalcoholic extracts from A. officinalis root are used mainly because of their antitussive and expectorant activity. It is well known that these activities are based on the polysaccharide composition, but little is known about the possible antioxidant activity of root extract. The present study evaluated antioxidant activity of root extracts prepared with different extraction solvents applying ABTS·+ (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid), hypochlorous acid scavenging assay and iron-induced lipid peroxidation. The results showed that the extract prepared with water as extraction solvent did not possess antioxidant activity, whereas the extracts obtained using ethanol:water as extraction agent showed well pronounced antioxidant activity. In particular, the extracts obtained at low concentration of ethanol in the mixed solvent (50:50 and 70:30, v/v) showed higher scavenging activity for ABTS·+ radicals and hypochlorite ions than the extract obtained with the higher ethanol concentration (90:10, v/v). These results correlated very well with phenolic and flavonoid content of the extracts. The extracts did not show cytotoxic effect on human BV-173 leukemic cells but may have immunomodulating effects due to their antioxidant properties.

show abstract

“…Arap residues are quantitatively minor components of arabinans isolated from several plants (Capek et al, 1983;Stephen, 1983;Kiyohara et al, 1987;Swamy and Salimath, 1991). 3-O-b-L-Arap-L-Ara has been isolated from partial acid hydrolysates of larchwood arabinogalactan (Odonmažig et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

Identification of a Mung Bean Arabinofuranosyltransferase That Transfers Arabinofuranosyl Residues onto (1, 5)-Linked α-l-Arabino-Oligosaccharides

et al. 2006

View full text Add to dashboard Cite

Arabinofuranosyltransferase activity was identified in Golgi membranes obtained from mung bean (Vigna radiata) hypocotyls. The enzyme transfers the arabinofuranosyl (Araf) residue from UDP-b-L-arabinofuranose to exogenous (1, 5)-linked a-L-arabinooligosaccharides labeled at their reducing ends with 2-aminobenzamide. The transferred residue was shown, using 1 H-nuclear magnetic resonance spectroscopy and a-L-arabinofuranosidase treatment, to be a-L-Araf and to be linked to O-5 of the nonreducing terminal Araf residue of the acceptor oligosaccharide. The enzyme was nonprocessive because only a single Araf residue was added to the acceptor molecule. Arabino-oligosaccharides with a degree of polymerization between 3 and 8 were acceptor substrates. The 2-aminobenzamide-labeled arabino-tetra-and pentasaccharides were the most effective acceptor substrates analyzed. The enzyme has a pH optimum between 6.5 and 7.0 and its activity is stimulated by Mn 21 and Co 21 ions. The apparent K m and V max values of the arabinofuranosyltransferase for UDP-arabinofuranose are 243 mM and 243 pmol min 21 mg protein 21 , respectively. The highest enzyme activity was detected in the elongating regions of mung bean hypocotyls. The data show that UDP-arabinofuranose is the donor molecule for the generation of arabino-oligosaccharides composed of Araf residues.

show abstract

Polysaccharides from the roots of the marsh mallow (Althaea officinalis L.): Structure of an arabinan

Cited by 74 publications

References 13 publications

Pectin changes in samples containing poplar cambium and inner bark in relation to the seasonal cycle

Pectin changes in samples containing poplar cambium and inner bark in relation to the seasonal cycle

Influence of the extraction solvent on antioxidant activity of Althaea officinalis L. root extracts

Identification of a Mung Bean Arabinofuranosyltransferase That Transfers Arabinofuranosyl Residues onto (1, 5)-Linked α-l-Arabino-Oligosaccharides

Contact Info

Product

Resources

About