Salmonella SdiA recognizes N-acyl homoserine lactone signals from Pectobacterium carotovorum in vitro, but not in a bacterial soft rot.

Molecular Plant-microbe Interactions : MPMI
J T NoelM Teplitski

Abstract

Genomes of Salmonella enterica isolates, including those linked to outbreaks of produce-associated gastroenteritis, contain sdiA, which encodes a receptor of N-acyl homoserine lactones (AHL). AHL are the quorum-sensing signals used by bacteria to coordinately regulate gene expression within -their populations. Because S. enterica does not produce its own AHL, SdiA is hypothesized to function in the interspecies cross-talk with AHL-producing bacteria. Under laboratory conditions, S. enterica responded to AHL from phytobacteria by upregulating expression of srgE. AHL-dependent expression of srgE required a functional sdiA. Essentially, no sdiA-dependent resolution of the srgE recombinase-based (RIVET) reporter was observed inside a soft rot formed on a tomato by an AHL-producing strain of Pectobacterium carotovorum. The results of the control experiments suggest that sdiA is not expressed inside tomato, pepper, green onion, or carrot affected by the soft rot, and the lack of sdiA expression in planta prevents Salmonella spp. from responding to AHL. Despite its inability to detect and respond to AHL during colonization of soft rots, S. enterica reached higher final cell numbers inside a tomato soft rot compared with its growth in ...Continue Reading

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Citations

Mar 20, 2013·Phytopathology·Maria T BrandlMax Teplitski
Oct 30, 2012·Applied and Environmental Microbiology·Danielle M GoudeauMaria T Brandl
Jul 10, 2013·Infection and Immunity·Haiqing ShengVanessa Sperandio
Nov 13, 2012·Journal of Bacteriology·Matthew C SwearingenBrian M M Ahmer
Mar 9, 2013·Microbiology and Molecular Biology Reviews : MMBR·Breah LaSarre, Michael J Federle
Aug 31, 2011·PloS One·Maria del Pilar Marquez-VillavicencioAmy O Charkowski
Jun 5, 2012·Annual Review of Phytopathology·Jeri D Barak, Brenda K Schroeder
Mar 1, 2011·Current Opinion in Microbiology·Jitesh A Soares, Brian M M Ahmer
Dec 17, 2017·Applied and Environmental Microbiology·Andrée S GeorgeMax Teplitski
Jan 10, 2017·Biotechnology and Bioengineering·Eduardo XimenesMichael Ladisch
Dec 20, 2015·Applied and Environmental Microbiology·Andree S GeorgeMax Teplitski
Mar 22, 2015·Applied and Environmental Microbiology·Staci L NugentCraig Altier
Jun 14, 2013·Environmental Microbiology Reports·William J ZaragozaMax Teplitski

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