The fate of spontaneous chromosomal rifampin-resistant (Rifr) mutants of Pseudomonas putida and Pseudomonas fluorescens in sterile and live organic soil from which they were isolated was studied. In sterile native-soil assays, a Rifr mutant of P. putida showed no decrease in competitive fitness when compared with the wild-type parent. However, mutants of P. fluorescens were of two general categ...

INTRODUCTION Antibiotic sensitivity and the effect of temperature on microbial growth are two standard laboratory activities found in most microbial laboratory manuals. We have found a novel way to combine the two activities to demonstrate how temperature can influence antibiotic sensitivity using a standard incubator in instructional laboratory settings. This activity reinforces the important ...

Brazil has 180 Mha of pastures, 86 occupied with Urochloa spp. (syn. Brachiaria), and 70% in some level degradation. Inoculation plant-growth-promoting bacteria (PGPR) may represent an economic environmental feasible strategy to improve pasture production. Two greenhouse seven field trials were performed verify the effects seed inoculation at sowing or leaf-spray established pastures elite stra...

In a period of nine months, 225 strains of Gram-negative bacilli isolated from burns were identified by a variety of tests in two burn centers in Tehran. The most common species were Pseudomonas aeruginosa, Pseudomonas fluorescens, Escherichia coli, Enterobacter agglomerans, Enterobacter cloacae and Klebsiella pneumoniae. Many strains of acinetobacter spp, providencia spp, proteus spp, ser...

in a period of nine months, 225 strains of gram-negative bacilli isolated from burns were identified by a variety of tests in two burn centers in tehran. the most common species were pseudomonas aeruginosa, pseudomonas fluorescens, escherichia coli, enterobacter agglomerans, enterobacter cloacae and klebsiella pneumoniae. many strains of acinetobacter spp, providencia spp, proteus spp, serratia...

The wild-type strain of Pseudomonas fluorescens was found to utilize a range of structurally diverse organophosphonates as its sole carbon or nitrogen sources. Representative compounds included aminoalkylphosphonates, hydroxyalkylphosphonates, oxoalkylphosphonates, and phosphono dipeptides. Among them, amino(phenyl)methylphosphonate,2-aminoethylphosphonate, aminomethylphosphonate, diisopropyl 9...

Pseudomonas sp. strain KENGFT3 inhibits the growth of Phytophthora infestans and is a potentially useful biopesticide for plant diseases, including potato late blight. We sequenced the 6.2-Mbp genome of this strain and assembled it into a single scaffold with 9 contigs. KENGFT3 is related to previously sequenced strains of P. fluorescens.

Human exposure to nitrogen dioxide (NO2), an air pollutant of increasing interest in biology, results in several toxic effects to human health and also to the air microbiota. The aim of this study was to investigate the bacterial response to gaseous NO2. Two Pseudomonas fluorescens strains, namely the airborne strain MFAF76a and the clinical strain MFN1032 were exposed to 0.1, 5, or 45 ppm conc...

the impact of phenolic-contaminated water on microbial community structure was assessed using biolog microarrays techniques. the following biolog plates were used: gen iii plates, new test panel for identification of both gram-negative and gram-positive bacteria, ecoplates microarray for evaluation of functional diversity of microbial communities and phenotype microarrays (pms) for characteriza...