Taxonomy and distribution of phenazine-producing Pseudomonas spp. in the dryland agroecosystem of the Inland Pacific Northwest, United States.

We investigated the taxonomic placement of phenazine-producing fluorescent Pseudomonas spp. in the Inland Pacific Northwest region of the United States. Five distinct species were identified, two of which were provisionally considered to be new. Agroclimatic zone and soil silt content affected the species diversity across the region.