title: Extracellular polysaccharide production by Azorhizobium caulinodans from stem nodules of leguminous emergent hydrophyte Aeschynomene aspera.
abstract: The Azorhizobium caulinodans isolated from the stem nodules of a leguminous emergent hydrophyte, Aeschynomene aspera, produced a large amount of extracellular polysaccharides (EPS) in yeast extract basal medium. Maximum EPS production was at the stationary phase of growth. EPS production was increased by 919% over control when the medium was supplemented with sucrose (1.5%), D-biotin (1 microgram/ml) and casamino acid (0.1%). EPS contained rhamnose and arabinose. Possible role of the azorhizobial EPS production in the stem nodule symbiosis is discussed.
authors.affiliation: Department of Botany, Burdwan University, Golapbag, Burdwan 713104, India.
authors.forename: A C
authors.initials: AC
authors.lastname: Ghosh
authors.forename: P S
authors.initials: PS
authors.lastname: Basu
mesh_terms: D007887:Fabaceae / Q000378:metabolism* / Q000382:microbiology*; D018547:Plant Stems / Q000382:microbiology*; D010946:Plants, Medicinal; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis*; D012231:Rhizobium / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D011135:Polysaccharides, Bacterial