J Genomics 2017; 5:91-98. doi:10.7150/jgen.21588
Genome Comparison of Pseudomonas fluorescens UM270 with Related Fluorescent Strains Unveils Genes Involved in Rhizosphere Competence and Colonization
1. Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México;
2. Department of Biology, Wilfrid Laurier University, Waterloo, Ontario, Canada.
Hernández-Salmerón JE, Moreno-Hagelsieb G, Santoyo G. Genome Comparison of Pseudomonas fluorescens UM270 with Related Fluorescent Strains Unveils Genes Involved in Rhizosphere Competence and Colonization. J Genomics 2017; 5:91-98. doi:10.7150/jgen.21588. Available from http://www.jgenomics.com/v05p0091.htm
Pseudomonas fluorescens UM270 is a rhizosphere-colonizing bacterium that produces multiple diffusible and volatile compounds involved in plant growth-promoting activities. Strain UM270 exhibits excellent biocontrol capacities against diverse fungal pathogens. In a previous study, the general UM270 genome characteristics were published. Here, we report a deeper analysis of its gene content and compare it to other P. fluorescens strains to unveil the genetic elements that might explain UM270's great colonizing and plant growth-promoting capabilities. Our analyses found high variation in genome size and gene content among the eight Pseudomonas genomes analyzed (strains UM270, Pf0-1, A506, F113, SBW25, PICF-7, UK4 and UW4). A core genome of 3,039 coding DNA sequences (CDSs) was determined, with 599 CDSs present only in the UM270 genome. From these unique UM270 genes, a set of 192 CDSs was found to be involved in signaling, rhizosphere colonization and competence, highlighted as important traits to achieve an effective biocontrol and plant growth promotion.
Keywords: Pseudomonas, Comparative Genomics, Rhizosphere, Biocontrol, Plant Growth-Promotion Bacteria.