Chemical characterization and complement fixation of pectins from Cola cordifolia leaves

Partial structural characterization of pectin cell wall from Argania spinosa leaves

“…4 ). These results are in agreement with previous studies reported in some leaves up to now, in Mesembryanthenum crystallinum ( M’sakni et al, 2006 ), in two plants endemic to central Africa, Fleurya aestuans (Linnaeus) Miquel and Phragmenthera capitata (Spreng) ( Aboughe Angone et al, 2009 ) and in the medicinal tree Cola cordifolia ( Austarheim et al, 2014 ) in which rhamnogalacturonan type I structure is variable.…”

Structural and rheological studies of a polysaccharide mucilage from lacebark leaves (Hoheria populnea A. Cunn.)

“…Although uncommon, a similar predominance of Rha over GalA has been reported in RG I from flax seed mucilage and Arabidopsis[27,41] and is evident in the mucilages from many of the Malvaceae species studied[9,10,31,33]. The presence of branching at O-3 of 2-Rhap residues is unusual for mucilages from Malvaceae species, having only been previously reported in the leaves and bark of Cola cordifolia[6,25]. While branching at O-3 of Rhap residues is rare in RG I polysaccharides there is also evidence of this branching pattern in RG I from flax seed mucilage[27] and pectic-type polysaccharides from the inner bark of Ulmus glabra (Wych elm)[26].…”

“…. The presence of 2-and 2,4-Rhap is typical of rhamnogalacturonan I (RG I); the presence of 2,3-Rhap is unusual but has been reported in pectin-like polysaccharides from the bark and leaves of C. cordifolia (Malvaceae)[6,25], the inner bark of Ulmus glabra (Ulmaceae)[26] and in mucilage from the seeds of Linum usitatissimum (linseed; Linaceae)[27]. The GalpA residues were both 4-and 3,4-linked; 4linked GalpA is typical of RG I and 3,4-linked GalpA is typical of RG II, although there was no further evidence for the presence of this pectic polysaccharide[28].Gum and mucilage polysaccharides structurally related to pectic polysaccharides have been shown to contain 4linked GalpA branched at O-3 with terminal GlcpA residues [29, 30].…”

Structure–activity relationship of immunomodulating pectins from elderberries

“…These units may be located in the hairy regions of the acidic fractions [97]. The acidic polysaccharide fractions from elderflowers were treated with a weak acid (oxalic acid) which resulted in a loss of Ara and 1,3,6-linked Gal (Table 3 and Table 4 Austarheim et al [98] suggested that a single 4-O-Me-GlcA residue was linked to GalA in the rhamnogalacturonan backbone in Cola cardifolia. The amount of 1,3-and 1,3,6-Gal were somewhat higher in sub-fractions-I than in sub-fractions-II suggesting that AG-II is more prevalent in sub-fractions-I.…”