The plant pathogen Erwinia amylovora produces acyl-homoserine lactone signal molecules in vitro and in planta

Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012 Trieste, Italy.
FEMS Microbiology Letters (Impact Factor: 2.72). 01/2005; 241(2):179-83. DOI: 10.1016/j.femsle.2004.10.015
Source: PubMed

ABSTRACT We report for the first time the production of acyl homoserine lactones (AHLs) by Erwina amylovora, an important quarantine bacterial pathogen that causes fire blight in plants. E. amylovora produces one N-acyl homoserine lactone [a N-(3-oxo-hexanoyl)-homoserine lactone or a N-(3-hydroxy-hexanoyl)-homoserine lactone] quorum sensing signal molecule both in vitro and in planta (pear plant). Given the involvement of AHLs in plant pathogenesis, we speculate that AHL-dependent quorum sensing could play an important role in the regulation of E. amylovora virulence.

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Available from: Claudio Aguilar, Jul 15, 2015
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    • "), Erwinia amylovora lacks a corresponding signalgenerating enzyme. This contradicts previous reports for AHLsignaling in E. amylovora (Venturi et al. 2004; Molina et al. 2005). Nearby gene EAMY_1411 has low sequence identity (29%) with the AI-1 synthesis protein PhzI of Pseudomonas chlororaphis. "
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    • "Numerous attempts have been made to demonstrate an AHL from the fire blight pathogen Erwinia amylovora. In two recent reports (Venturi et al., 2004; Molina et al., 2005), the existence of an Erwinia amylovora AHL has been claimed. As a consequence of several assays discussed here, these findings could not be confirmed. "
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