title: Polysaccharides production by Rhizobium phaseoli and the typing of their excreted anionic polysaccharides.
abstract: The pattern of polysaccharide production amongst strains of Rhizobium phaseoli appear very varied: some strains produce anionic exopolysaccharides (EPS) as major polysaccharides (EPS) as major polymer without any other product, but most strains exhibit greater polysaccharide diversity. Apart from EPS they excrete capsular polysaccharides (CPS) and accumulate poly-beta-hydroxybutyric acid (PHB) and/or glycogen in their cells. The latter can then be used as C-sources for further synthesis of EPS and CPS. Some strains are only very poor producers or do not produce at all. Nine strains of R. phaseoli have been analysed and shown to possess the K-36 type of polysaccharide (EPS), as do strains of R. leguminosarum (6 strains) and R. trifolii (9 strains). Three strains of R. phaseoli have been found to possess the K-87 type of polysaccharide and types K-38 and K-44 polysaccharides have only been found in their own type strains.
authors.affiliation: Laboratory of Microbiology, Agricultural University, Wageningen, The Netherlands.
authors.forename: L P
authors.initials: LP
authors.lastname: Zevenhuizen
authors.forename: C
authors.initials: C
authors.lastname: Bertocchi
mesh_terms: D002236:Carbohydrate Conformation; D055598:Chemical Phenomena; D002621:Chemistry; D005690:Galactose / Q000032:analysis; D005947:Glucose / Q000032:analysis; D005965:Glucuronates / Q000032:analysis; D007700:Kinetics; D011135:Polysaccharides, Bacterial / Q000032:analysis / Q000096:biosynthesis*; D011773:Pyruvates / Q000032:analysis; D012231:Rhizobium / Q000254:growth & development / Q000378:metabolism*
chemical_list: D005965:Glucuronates; D011135:Polysaccharides, Bacterial; D011773:Pyruvates; D005947:Glucose; D005690:Galactose