Conservation of plasmid-encoded traits among bean-nodulating Rhizobium species.
Rhizobium etli type strain CFN42 contains six plasmids. We analyzed the distribution of genetic markers from some of these plasmids in bean-nodulating strains belonging to different species (Rhizobium etli, Rhizobium gallicum, Rhizobium giardinii, Rhizobium leguminosarum, and Sinorhizobium fredii). Our results indicate that independent of geographic origin, R. etli strains usually share not only the pSym plasmid but also other plasmids containing symbiosis-related genes, with a similar organization. In contrast, strains belonging to other bean-nodulating species seem to have acquired only the pSym plasmid from R. etli.
Brom
Susana
S
Programa de Genética Molecular de Plásmidos Bacterianos, Centro de Investigación sobre Fijación de Nitrógeno, UNAM, Cuernavaca, Morelos, Mexico. sbrom@cifn.unam.mx
Girard
Lourdes
L
García-de los Santos
Alejandro
A
Sanjuan-Pinilla
Julio M
JM
Olivares
José
J
Sanjuan
Juan
J
D002876:Chromosomes, Bacterial; D017124:Conserved Sequence; D007887:Fabaceae / Q000382:microbiology*; D005819:Genetic Markers / Q000502:physiology; D010957:Plasmids / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D012231:Rhizobium / Q000235:genetics*
D005819:Genetic Markers