Putative SCB species 1 (SCB1) clearly belongs to the Alphaproteobacteria, and is closely related to bacteria belonging to the families Rhizobiaceae
and Phyllobacteriaceae in the order Rhizobiales (Fig.
The alpha-protcobacteria associated families of Rhodobacteraceae, Phyllobacteriaceae, and Rhizobiaceae
were also present in the Blowing Spring Cave soil samples.
For more than 100 years, biologists had reported nodules forming only with bacteria in the alpha branch of group Proteobacteria, especially those in the Rhizobiaceae
Recovery of Methylobacteriaceae, Rhizobiaceae
, Alealigenaceae, and Flavobacteriacae by amoebal coculture shows that these clades should be added to the growing number of ARB.
Nitrogen-fixing Bacteria--Species of the genus Rhizobium, family Rhizobiaceae
, that live symbiotically in the root nodules of leguminous plants, upon which they are dependent.
This Agrobacterium genus of about 4 species is found in the Rhizobiaceae
family, along with the Rhizobium genus of nitrogen fixers (Fig.
The symbiosis between legumes and Rhizobiaceae
should be an excellent system for exploring the geographic structure of mutualisms, since past studies of domesticated legumes have often found extreme variation in plant-bacterial compatibility (Gibson 1964; Mytton 1975; Mytton et al.
The two- component system BvrR/BvrS essential for Brucella abortus virulence regulates the expression of membrane proteins with counterparts in members of the Rhizobiaceae