title: Rhizobium alamii sp. nov., an exopolysaccharide-producing species isolated from legume and non-legume rhizospheres.
abstract: A group of exopolysaccharide-producing bacteria was isolated from the root environment of Arabidopsis thaliana. The genetic diversity revealed by REP-PCR fingerprinting indicated that the isolates correspond to different strains. 16S rRNA gene sequence analysis showed that the isolates are closely related to the strains Rhizobium sp. YAS34 and USDA 1920, respectively isolated from sunflower roots and Medicago ruthenica nodules. These bacteria belong to the Rhizobium lineage of the Alphaproteobacteria, and the closest known species was Rhizobium sullae. DNA-DNA hybridization experiments and biochemical analysis demonstrated that the nine strains isolated from A. thaliana and Rhizobium strains YAS34 and USDA 1920 constitute a novel species within the genus Rhizobium, for which the name Rhizobium alamii sp. nov. is proposed. The type strain is GBV016(T) (=CFBP 7146(T) =LMG 24466(T)).
authors.affiliation: CEA, DSV, IBEB, SBVME, Laboratoire d'Ecologie Microbienne de la Rhizosphère et d'Environnements Extrêmes (LEMiRE), F-13108 Saint-Paul-lez-Durance, France. odile.berge@cea.fr
authors.forename: Odile
authors.initials: O
authors.lastname: Berge
authors.forename: Asma
authors.initials: A
authors.lastname: Lodhi
authors.forename: Géraldine
authors.initials: G
authors.lastname: Brandelet
authors.forename: Catherine
authors.initials: C
authors.lastname: Santaella
authors.forename: Marie-Anne
authors.initials: MA
authors.lastname: Roncato
authors.forename: Richard
authors.initials: R
authors.lastname: Christen
authors.forename: Thierry
authors.initials: T
authors.lastname: Heulin
authors.forename: Wafa
authors.initials: W
authors.lastname: Achouak
mesh_terms: D007887:Fabaceae / Q000382:microbiology*; D008969:Molecular Sequence Data; D010802:Phylogeny; D018517:Plant Roots / Q000382:microbiology; D011135:Polysaccharides, Bacterial / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012231:Rhizobium / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D013045:Species Specificity
chemical_list: D011135:Polysaccharides, Bacterial; D012336:RNA, Ribosomal, 16S