LuxR- and luxI-type quorum-sensing circuits are prevalent in members of the Populus deltoides microbiome.

ABSTRACT: We are interested in the root microbiome of the fast-growing Eastern cottonwood tree, Populus deltoides. There is a large bank of bacterial isolates from P. deltoides, and there are 44 draft genomes of bacterial endophyte and rhizosphere isolates. As a first step in efforts to understand the roles of bacterial communication and plant-bacterial signaling in P. deltoides, we focused on the prevalence of acyl-homoserine lactone (AHL) quorum-sensing-signal production and reception in members of the P. deltoides microbiome. We screened 129 bacterial isolates for AHL production using a broad-spectrum bioassay that responds to many but not all AHLs, and we queried the available genome sequences of microbiome isolates for homologs of AHL synthase and receptor genes. AHL signal production was detec

SUBMITTER: Schaefer AL 

PROVIDER: S-EPMC3754149 | biostudies-literature | 2013 Sep

REPOSITORIES: biostudies-literature