| rhizobium mongolense sp. nov. is one of three rhizobial genotypes identified which nodulate and form nitrogen-fixing symbioses with medicago ruthenica [(l.) ledebour]. | medicago ruthenica [(l.) ledebour] is native to inner mongolia where rhizosphere samples were collected for the isolation of 106 rhizobial cultures. besides nodulating the original trap host, the isolates formed nitrogen-fixing symbioses with phaseolus vulgaris. only half of the isolates nodulated alfalfa (medicago sativa), but these did not form nitrogen-fixing symbioses. rhizobium tropici also formed nitrogen-fixing symbioses with medicago ruthenica. a total of 56 distinctive multilocus electr ... | 1998 | 9542071 |
| rhizobium alamii sp. nov., an exopolysaccharide-producing species isolated from legume and non-legume rhizospheres. | 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 alphaproteobac ... | 2009 | 19196780 |