Search results for "Comamonadaceae"

Microdiversity of Burkholderiales associated with mycorrhizal and nonmycorrhizal roots of Medicago truncatula

2008

The genetic diversity of bacterial communities associated with mycorrhizal and nonmycorrhizal roots of Medicago truncatula was characterized by two approaches. Firstly, phylogenetic analysis was performed on 164 partial 16S rRNA gene-intergenic spacer (IGS) sequences from operational taxonomic units previously shown to be preferentially associated with mycorrhizal roots. These sequences were distributed into three branches corresponding to Comamonadaceae, Oxalobacteraceae and Rubrivivax subgroups. Most sequences were obtained from mycorrhizal roots, indicating the preferential association of the corresponding families with mycorrhizal roots. A second phylogenetic analysis was performed on t…

DNA-DNA hybridization and ribotyping of Acidovorax delafieldii isolates from eels and aquatic environments

1992

Eleven strains of Acidovorax isolated from a freshwater lake and from healthy and diseased European eels in a hatchery were investigated by genotypic methods. DNA-DNA slot blot hybridization confirmed the identity of all strains as A. delafieldii. Isolates were heterogeneous in EcoR1 ribopatterns with four types recognizable. Most freshwater and healthy eel strains had the same ribotype but differed from the disease-associated strains. Typical ribopatterns of A. delafieldii contained 1·3, 1·5, and 3·2 kb fragments which provided useful additional taxonomic markers for species identification.

Populations bactériennes associées aux racines mycorhizées de Medicago truncatula: de la communauté à la souche bactérienne

2007