Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 274-282 |
| Number of pages | 9 |
| Journal | Journal of Biotechnology |
| Volume | 159 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 30 Jun 2012 |
| Externally published | Yes |
Cite this
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N-acyl-homoserine-lactone quorum sensing in tomato phytopathogenic Pseudomonas spp. is involved in the regulation of lipodepsipeptide production. / Licciardello, Grazia; Strano, Cinzia P.; Bertani, Iris; Bella, Patrizia; Fiore, Alberto; Fogliano, Vincenzo; Venturi, Vittorio; Catara, Vittoria.
In: Journal of Biotechnology, Vol. 159, No. 4, 30.06.2012, p. 274-282.Research output: Contribution to journal › Article
TY - JOUR
T1 - N-acyl-homoserine-lactone quorum sensing in tomato phytopathogenic Pseudomonas spp. is involved in the regulation of lipodepsipeptide production
AU - Licciardello, Grazia
AU - Strano, Cinzia P.
AU - Bertani, Iris
AU - Bella, Patrizia
AU - Fiore, Alberto
AU - Fogliano, Vincenzo
AU - Venturi, Vittorio
AU - Catara, Vittoria
PY - 2012/6/30
Y1 - 2012/6/30
N2 - Pseudomonas corrugata and Pseudomonas mediterranea are two closely related phytopathogenic bacteria both causal agents of tomato pith necrosis. P. corrugata produces phytotoxic and antimicrobial cationic lipodepsipeptides (LDPs) which are thought to act as major virulence factors. Previous studies have demonstrated that P. corrugata CFBP 5454 has an N-acyl homoserine lactone (AHL) quorum sensing (QS) system PcoI/PcoR and that LDP production occurs at high population densities. No molecular studies on virulence have thus far been reported for P. mediterranea. In this study, we show that P. mediterranea also produces LDPs as well as possessing an AHL-dependent QS system, designated PmeI/PmeR, which is highly homologous to the PcoI/R system of P. corrugata producing and responding to C6-AHL. Downstream of pmeI, a partial DNA sequence revealed the presence of a homolog of the rfiA gene of P. corrugata which encodes a transcriptional regulator involved in bacterial virulence. Pathogenicity tests and MALDI-TOF spectra of wild-type strains of both bacterial species and their respective QSs and rfiA derivative mutants revealed that, in the absence of LDPs, the strains induce very weak symptoms indicating that LDPs may act as major virulence factors. Mutational analysis of both QS systems suggests that their mode of action is in places different.
AB - Pseudomonas corrugata and Pseudomonas mediterranea are two closely related phytopathogenic bacteria both causal agents of tomato pith necrosis. P. corrugata produces phytotoxic and antimicrobial cationic lipodepsipeptides (LDPs) which are thought to act as major virulence factors. Previous studies have demonstrated that P. corrugata CFBP 5454 has an N-acyl homoserine lactone (AHL) quorum sensing (QS) system PcoI/PcoR and that LDP production occurs at high population densities. No molecular studies on virulence have thus far been reported for P. mediterranea. In this study, we show that P. mediterranea also produces LDPs as well as possessing an AHL-dependent QS system, designated PmeI/PmeR, which is highly homologous to the PcoI/R system of P. corrugata producing and responding to C6-AHL. Downstream of pmeI, a partial DNA sequence revealed the presence of a homolog of the rfiA gene of P. corrugata which encodes a transcriptional regulator involved in bacterial virulence. Pathogenicity tests and MALDI-TOF spectra of wild-type strains of both bacterial species and their respective QSs and rfiA derivative mutants revealed that, in the absence of LDPs, the strains induce very weak symptoms indicating that LDPs may act as major virulence factors. Mutational analysis of both QS systems suggests that their mode of action is in places different.
U2 - 10.1016/j.jbiotec.2011.07.036
DO - 10.1016/j.jbiotec.2011.07.036
M3 - Article
VL - 159
SP - 274
EP - 282
JO - Journal of Biotechnology
JF - Journal of Biotechnology
SN - 0168-1656
IS - 4
ER -