Abstract Microorganisms adopt a unique mechanism for sequestration and transport of bound iron by producing iron-chelating molecules called siderophores. Siderophores play an important role in colonization microbes iron-deficient sites the host, hence acting as virulence factor promising carriers antimicrobials to target inside microbial cells. The research was conducted identify characterize s...

Shipworms are marine bivalve mollusks (Family Teredinidae) that use wood for shelter and food. They harbor a group of closely related, yet phylogenetically distinct, bacterial endosymbionts in bacteriocytes located in the gills. This endosymbiotic community is believed to support the host's nutrition in multiple ways, through the production of cellulolytic enzymes and the fixation of nitrogen. ...

Mutants of Pseudomonas fluorescens WCS374 defective in biosynthesis of the fluorescent siderophore pseudobactin still display siderophore activity, indicating the production of a second siderophore. A recombinant cosmid clone (pMB374-07) of a WCS374 gene library harboring loci necessary for the biosynthesis of salicylic acid (SA) and this second siderophore pseudomonine was isolated. The salicy...

When Azotobacter vinelandii was grown in the presence of low levels of iron, the addition of 20 or 40 muM ZnSO(4) caused earlier production of the catechol siderophores and a dramatic increase in the amount of azotobactin. The level of cellular iron was not significantly lowered in Zn -grown cells, which suggested that Zn was not causing more severe, or earlier, iron limitation. Also, Zn did no...

Brucella abortus reportedly produces the monocatechol siderophore 2,3-dihydroxybenzoic acid (2,3-DHBA) in response to iron limitation. Nucleotide sequence analysis of the cloned DHBA biosynthesis locus from virulent B. abortus 2308 and genetic complementation of defined Escherichia coli mutants were used to identify the B. abortus genes (designated dhbC, -B, and -A) responsible for synthesis of...

We investigated the biocontrol activity of A. pullulans Dmg 30 DEP against Alternaria solani causal agent early blight. Biocontrol was tested by in vivo and ad planta. were investigating antibiosis capabilities with dual culture method, paper dish assay, two-compartment petri trapping identification volatile organic compounds (VOCs) GC-MS. Lysis examined observing clear zone formed growing yeas...

AIMS The aim of this study was to determine whether manuka honey affected siderophore production by three strains of Pseudomonas aeruginosa. METHODS AND RESULTS The minimum inhibitory concentration (MIC) of manuka honey against each of the test bacteria was determined. The effect of manuka honey on siderophore production by three strains of Ps. aeruginosa was investigated using the Chrome azu...