LuxR Solos in the Plant Endophyte sp. Strain KO348.

Endophytes are microorganisms that live inside plants and are often beneficial for the host. is a novel bacterial genus that includes several species that are diazotrophic and plant associated. This study revealed two quorum sensing-related LuxR solos, designated LoxR and PsrR, in the plant endophyte sp.

Study of the Regulatory Role of -Acyl Homoserine Lactones Mediated Quorum Sensing in the Biological Activity of pv. Causing Soft Rot of spp.

Many spp. produce secondary metabolites with relevant biological activities and potential practical applications. pv.

Many plant pathogenic Pseudomonas savastanoi pv glycinea isolates possess an inactive quorum sensing ahlR gene via a point mutation.

Many plant bacterial pathogens monitor their group behaviour and their population density via production of N-acyl homoserine lactone signals which regulate the expression of several genes via the LuxI/R homologs. This regulatory network, termed quorum sensing (QS), is present in the soybean bacterial pathogen Pseudomonas savastanoi pv glycinea (Psg). The sequenced genomes of two strains of Psg, race 4 and B076, contain an N-acyl homoserine lactone (AHL) based LuxI/R QS system named AhlI/R.

A Na /Ca exchanger of the olive pathogen Pseudomonas savastanoi pv. savastanoi is critical for its virulence.

In a number of compatible plant-bacterium interactions, a rise in apoplastic Ca levels is observed, suggesting that Ca represents an important environmental clue, as reported for bacteria infecting mammalians. We demonstrate that Ca entry in Pseudomonas savastanoi pv. savastanoi (Psav) strain DAPP-PG 722 is mediated by a Na /Ca exchanger critical for virulence.