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A critical examination of the specificity of the salkowski reagent for indolic compounds produced by phytopathogenic bacteria
Three versions of the Salkowski colorimetric technique reacted not only with auxin (IAA) but also with indolepyruvic acid and indoleacetamide, suggesting that these techniques appear to be specific for IAA, indolePyruvic Acid, and indolesacetamide rather than for I AA alone.
N-Acylhomoserine Lactones Undergo Lactonolysis in a pH-, Temperature-, and Acyl Chain Length-Dependent Manner during Growth of Yersinia pseudotuberculosis and Pseudomonas aeruginosa
Data show that to be functional under physiological conditions in mammalian tissue fluids, AHLs require an N-acyl side chain of at least four carbons in length and that the longer the acyl side chain the more stable the AHL signal molecule.
Quorum Sensing and Quorum Quenching: The Yin and Yang of Bacterial Communication
This work has shown that light emission by V. fischeri depends upon the bacterial cell density, and only occurs at high cell densities, which explains why V.fischeri only produces light in the fish organ where it lives at very high densities.
Azospirillum Genomes Reveal Transition of Bacteria from Aquatic to Terrestrial Environments
- F. Wisniewski-Dyé, Kirill Borziak, I. Zhulin
- Biology, Environmental SciencePLoS genetics
- 1 December 2011
The results show that transition of some aquatic bacteria to terrestrial habitats occurred much later than the suggested initial divergence of hydro- and terrabacterial clades and the birth of the genus Azospirillum approximately coincided with the emergence of vascular plants on land.
A Rhodococcus qsdA-Encoded Enzyme Defines a Novel Class of Large-Spectrum Quorum-Quenching Lactonases
- S. Uroz, P. Oger, E. Chapelle, M. Adeline, D. Faure, Y. Dessaux
- BiologyApplied and Environmental Microbiology
- 11 January 2008
Bacteria harboring the qsdA gene interfere very efficiently with quorum-sensing-regulated functions, demonstrating that qSDA is a valuable tool for developing quorum -quorum-quenching procedures.
Novel bacteria degrading N-acylhomoserine lactones and their use as quenchers of quorum-sensing-regulated functions of plant-pathogenic bacteria.
The diversity of the QS-interfering bacteria in the rhizosphere is revealed and the validity of targeting QS signal molecules to control pathogens with natural bacterial isolates is demonstrated.
Auxin production is a common feature of most pathovars of Pseudomonas syringae.
- E. Glickmann, L. Gardan, Y. Dessaux
- BiologyMolecular plant-microbe interactions : MPMI
- 1 February 1998
Investigation of indole-3-acetic acid production by 57 pathovars of Pseudomonas syringae and related species found that most strains produced IAA, especially in the presence of tryptophan, and the iaaL gene encoding an IAA-lysine synthase was detected in most pathovar, and was often found on plasmids.
N-Acylhomoserine lactone quorum-sensing molecules are modified and degraded by Rhodococcus erythropolis W2 by both amidolytic and novel oxidoreductase activities.
- S. Uroz, S. R. Chhabra, M. Cámara, P. Williams, P. Oger, Y. Dessaux
- Chemistry, BiologyMicrobiology
- 1 October 2005
The Rhodococcus erythropolis strain W2 is shown to be capable of modifying and degrading AHL signal molecules through both oxidoreductase and amidolytic activities.
Quorum quenching: role in nature and applied developments.
The mechanisms, targets and molecular actors associated with QS interference are presented, with a special emphasis on the description of natural QQ enzymes and chemicals acting as QS inhibition in microbe- microbe and host-microbe interactions.
The Ti Plasmid of Agrobacterium tumefaciens Harbors an attM-Paralogous Gene, aiiB, Also Encoding N-Acyl Homoserine Lactonase Activity
- A. Carlier, S. Uroz, D. Faure
- Biology, EngineeringApplied and Environmental Microbiology
- 1 August 2003
The Agrobacterium tumefaciens C58 genome contains three putative N-acyl homoserine lactone (acyl-HSL) hydrolases, which are closely related to the lactonase AiiA of Bacillus, which conferred the ability to degrade acyl- HSLs on the host.