Project description:Plant-released flavonoids induce the transcription of symbiotic genes in rhizobia and one of the first bacterial responses is the synthesis of so called Nod factors. They are responsible for the initial root hair curling during onset of root nodule development. This signal exchange is believed to be essential for initiating the plant symbiosis with rhizobia affiliated with the alphaproteobacteria. Here, we provide evidence that in broad host range rhizobia the complete lack of quorum sensing molecules results in an elevated copy number of its symbiotic plasmid (pNGR234a). This in turn triggers the expression of symbiotic genes and the production of Nod factors in the absence of plant signals. Therefore, increasing the copy number of specific plasmids could be a widespread mechanism of specialized bacterial populations bridging gaps in signalling cascades and providing a competitive advantage.

2017-02-10 | GSE78039 | GEO

Rhizobiales bacterium TNE-4

Project description:Rhizobiales bacterium TNE-4 overview

| PRJNA741318 | ENA

Rhizobiales bacterium dw_265

Project description:Rhizobiales dw_265 bacterium Genome sequencing and assembly

| PRJNA613888 | ENA

Rhizobiales bacterium IMCC20636

Project description:Rhizobiales sp. IMCC20636 Genome sequencing and assembly

| PRJNA352099 | ENA

Rhizobiales bacterium RC43A_GOM-46m

Project description:Rhizobiales bacterium RC43A_GOM-46m Genome sequencing