title: Chemical studies on the polysaccharides of Salicornia brachiata.
abstract: A group of 12 polysaccharide extracts were prepared from the tips, stem and roots of an Indian halophyte Salicornia brachiata Roxb. obtained by sequential extractions with cold water (CW), hot water (HW), aqueous ammonium oxalate (OX) and aqueous sodium hydroxide (ALK) solutions. Monosaccharide composition analysis revealed that all the polysaccharide extract samples consisted primarily of rhamnose, arabinose, mannose, galactose, glucose, whereas ribose and xylose were present only in some of the extracts. All the extracts exhibited low apparent viscosity (1.47-2.02 cP) and sulphate and contained no prominent toxic metal ions. Fucose was detected only in OX extract of the roots. These polysaccharides were found to be heterogeneous and highly branched (glycoside linkage analysis, size-exclusion chromatography, (13)C-NMR, FT-IR, circular dichroism and optical rotation data). Physico-chemical analyses of these polysaccharides including uronic acid, sulphate and protein contents were also carried out. This constitutes the first report on the profiling of Salicornia polysaccharides.
authors.affiliation: Marine Biotechnology and Ecology Discipline, CSIR-Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India.
authors.forename: Naresh D
authors.initials: ND
authors.lastname: Sanandiya
authors.affiliation: Marine Biotechnology and Ecology Discipline, CSIR-Central Salt & Marine Chemicals Research Institute, G B Marg, Bhavnagar 364002, Gujarat, India; Academy of Scientific & Innovative Research, Anusandhan Bhavan, 2 Rafi Marg, New Delhi 110001, India. Electronic address: aks@csmcri.org.
authors.forename: A K
authors.initials: AK
authors.lastname: Siddhanta
mesh_terms: D002236:Carbohydrate Conformation; D019663:Chenopodiaceae / Q000737:chemistry*; D002942:Circular Dichroism; D005643:Fucose / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D009005:Monosaccharides / Q000032:analysis; D019815:Oxalic Acid / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D011134:Polysaccharides / Q000032:analysis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D009005:Monosaccharides; D010936:Plant Extracts; D011134:Polysaccharides; D005643:Fucose; D019815:Oxalic Acid
keywords: Chenopodiaceae; Glycosidic linkage analysis; Indian halophytes; Polysaccharides; Salicornia brachiata; Uronic acid, Arabinose, Galactose, Xylose, Glucose, Rhamnose, Fucose, Mannose, Ribose