World Journal of Microbiology and Biotechnology

, Volume 22, Issue 12, pp 1373–1375

Presence of Quorum-Sensing-Mediated Gene Regulation in Pathogenic Ice-Nucleation-Active (INA) Bacteria

Short Communication

DOI: 10.1007/s11274-006-9167-8

Cite this article as:
Nejad, P. & Ramstedt, M. World J Microbiol Biotechnol (2006) 22: 1373. doi:10.1007/s11274-006-9167-8


Nine out of a total of 20 pathogenic ice-nucleation-active bacteria, with different levels of inducible INA, were tested and found positive for their ability to synthesize quorum-sensing (QS) signals. The bacteria were isolated from willow plants and belonged to the genera Bacillus, Erwinia, Pseudomonas and Sphingomonas. As reporter bacteria, to detect the homoserine lactone (HSL) autoinducer, Agrobacterium tumefaciens, Chromobacterium violaceum, Pseudomonas aeroginosa, Aeromonas hydrophila and Vibrio fischeri strains were used. We thus provide evidence that pathogenic ice-nucleation bacteria with inducible INA produce QS signals that in other bacteria have been shown to be in the control of genes of importance for pathogenicity.


Quorum sensingSalix pathogensINA-bacteria

Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Department of Forest Mycology and PathologySLUUppsalaSweden