Draft Genome Sequence of Pseudomonas sp. Strain MWU12-2534b, Isolated from a Wild Cranberry Bog in Truro, Massachusetts

Draft Genome Sequence of Pseudomonas sp. Strain MWU13-3659, Isolated from Commercial Cranberry Bog Soil in Massachusetts, USA

Pseudomonas sp. strain MWU13-3659 was isolated from cultivated cranberry bog soil in Massachusetts, USA. Its closest known relative is Pseudomonas entomophila (digital DNA-DNA hybridization [d4 formula] value of 57.2% and average nucleotide identity based on BLAST value of 93.90), and its genome contains putative gene clusters for the production of polyketides, siderophores, and cyclic lipopeptides that have insecticidal activity in other proteobacteria.

Draft Genome Sequences of Pseudomonas sp. Strains MWU 12-2029, MWU 12-3088, and MWU 12-3091, Isolated from Wild and Cultivated Massachusetts Cranberry Bogs

Pseudomonas sp. strains MWU12-2029, MWU12-3088, and MWU12-3091 were isolated from wild and cultivated cranberry bog soils in southeastern Massachusetts. The three isolates are closely related to Pseudomonas kribbensis, a not validly published member of the P. fluorescens group, and contain three putative insecticidal protein genes, including the toxin complex A gene (tcaC).

Pseudomonas fluorescens Complex and Its Intrinsic, Adaptive, and Acquired Antimicrobial Resistance Mechanisms in Pristine and Human-Impacted Sites

Pseudomonas spp. are ubiquitous microorganisms that exhibit intrinsic and acquired resistance to many antimicrobial agents. Pseudomonas aeruginosa is the most studied species of this genus due to its clinical importance. In contrast, the Pseudomonas fluorescens complex consists of environmental and, in some cases, pathogenic opportunistic microorganisms. The records of antimicrobial-resistant P. fluorescens are quite scattered, which hinders the recognition of patterns. This review compiles published data on antimicrobial resistance in species belonging to the P. fluorescens complex, which were identified through phylogenomic analyses. Additionally, we explored the occurrence of clinically relevant antimicrobial resistance genes in the genomes of the respective species available in the NCBI database. Isolates were organized into two categories: strains isolated from pristine sites and strains isolated from human-impacted or metal-polluted sites. Our review revealed that many reported resistant phenotypes in this complex might be related to intrinsic features, whereas some of them might be ascribed to adaptive mechanisms such as colistin resistance. Moreover, a few studies reported antimicrobial resistance genes (ARGs), mainly β-lactamases. In-silico analysis corroborated the low occurrence of transferable resistance mechanisms in this Pseudomonas complex. Both phenotypic and genotypic assays are necessary to gain insights into the evolutionary aspects of antimicrobial resistance in the P. fluorescens complex and the possible role of these ubiquitous species as reservoirs of clinically important and transmissible ARGs.

Chromobacterium alticapitis sp. nov. and Chromobacterium sinusclupearum sp. nov. isolated from wild cranberry bogs in the Cape Cod National Seashore, USA

Two non-pigmented strains in the genus Chromobacterium , MWU14-2602T and MWU13-2610T, were isolated from wild cranberry bogs in the Cape Cod National Seashore, USA. The isolates were characterized by genomic and phenotypic analyses, the results of which indicated that they represent two novel species. Based on total genome sequences, the closest relatives were in the Chromobacterium amazonense group, which includes the recently described Chromobacterium paludis . Whole genome sequences were compared by genome blast distance phylogeny, digital DNA–DNA hybridization and average nucleotide identity analyses with each other and with the type strains of their nearest species. MWU14-2602T and MWU13-2610T fell well below the accepted cutoff values for species relatedness, clearly indicating that they represent novel species. Although little is known about these organisms in situ, under laboratory conditions, MWU13-2610T produced a modest amount of HCN and was strongly positive for exoprotease activity, whereas MWU14-2602T did not produce HCN or exoproteases. The predominant fatty acids for both isolates were summed C16 : 1ω7cis/C16 : 1ω6cis. Both isolates produced siderophores and pyomelanin pigment on rich media, and neither was haemolytic on sheep blood agar. We propose the names Chromobacterium alticapitis sp. nov. (type strain MWU14-2602T=ATCC TSD 260T=CCOS 1979T) and Chromobacterium sinusclupearum sp. nov. (type strain MWU13-2610T=ATCC TSD-259T=CCOS 1981T) for these taxa.

Draft Genome Sequences of Pseudomonas spp. Isolated from Berry Surfaces in Commercial Cranberry Bogs in Massachusetts, USA

The surfaces of plants are colonized by a rich diversity of microbes but are largely unexplored. Here, we present the draft genome sequences of five Pseudomonas spp. isolated from cultivated cranberry fruit surfaces. Although the isolates represent four different species, their genomes all contain conserved iron sequestration and uptake genes.