Influence of host plant genotype, presence of a pathogen, and coinoculation with Pseudomonas fluorescens strains on the rhizosphere expression of hydrogen cyanide- and 2,4-diacetylphloroglucinol biosynthetic genes in P. fluorescens biocontrol strain CHA0.

The production of hydrogen cyanide (HCN) and 2,4-diacetylphloroglucinol (DAPG) is a major factor in the control of soil-borne diseases by Pseudomonas fluorescens CHA0. We investigated the impact of different biotic factors on the expression of HCN-in comparison to DAPG biosynthetic genes in the rhizosphere. To this end, the influence of plant cultivar, pathogen infection, and coinoculation with other biocontrol strains on the expression of hcnA-lacZ and phlA-lacZ fusion in strain CHA0 was monitored on the roots of bean.

Detection of phlD gene in some fluorescent pseudomonads isolated from Iran and its relative with antifungal activities.

Fluorescent pseudomonads that produce antibiotic 2,4-diacetylphloroglocinol (2,4-DAPG) are important group of PGRP that inhibit a broad spectrum of plant pathogenic fungi. Studying on genetic diversity of 2,4-diacetylphloroglucinol-producing fluorescent pseudomonads has been shown with special importance. The first step to investigate the genetic diversity of these bacteria is detecting of the genes required for the biosynthesis of this antibiotic.

Investigation of potential antibacterial properties of methanol extracts from fungus Ganoderma applanatum.

In this study we searched for antibacterial compounds in methanol extracts of three layers (tube layer, context and cutis) of Ganoderma applanatum fruit body against Bacillus subtilis ATCC 6051 as a gram-positive bacterium and Escherichia coli ATCC 25922 and Pseudomonas syringae pv. syringae DPIC 219 as gram-negative bacteria. We found antibacterial properties in all three layers only against gram-negative bacteria.