Funding Information This research was supported by the USDA-NRI AFRI grant 2011-67017-30127, the screen of the tomato varieties for susceptibility to Salmonella was funded by FDACS and the UC-Davis Center for Produce Safety. ASG is supported by the McKnight Graduate Fellowship.
Ethylene signalling affects susceptibility of tomatoes to Salmonella
Article first published online: 29 MAY 2014
© 2014 The Authors. Microbial Biotechnology published by John Wiley & Sons Ltd and Society for Applied Microbiology.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
How to Cite
Marvasi, M., Noel, J. T., George, A. S., Farias, M. A., Jenkins, K. T., Hochmuth, G., Xu, Y., Giovanonni, J. J. and Teplitski, M. (2014), Ethylene signalling affects susceptibility of tomatoes to Salmonella. Microbial Biotechnology. doi: 10.1111/1751-7915.12130
- Article first published online: 29 MAY 2014
- Manuscript Accepted: 19 APR 2014
- Manuscript Revised: 7 APR 2014
- Manuscript Received: 30 JAN 2014
- USDA-NRI AFRI. Grant Number: 2011-67017-30127
- UC-Davis Center for Produce Safety
- McKnight Graduate Fellowship
Fresh fruits and vegetables are increasingly recognized as important reservoirs of human pathogens, and therefore, significant attention has been directed recently to understanding mechanisms of the interactions between plants and enterics, like Salmonella. A screen of tomato cultivars for their susceptibility to Salmonella revealed significant differences in the ability of this human pathogen to multiply within fruits; expression of the Salmonella genes (cysB, agfB, fadH) involved in the interactions with tomatoes depended on the tomato genotype and maturity stage. Proliferation of Salmonella was strongly reduced in the tomato mutants with defects in ethylene synthesis, perception and signal transduction. While mutation in the ripening-related ethylene receptor Nr resulted only in a modest reduction in Salmonella numbers within tomatoes, strong inhibition of the Salmonella proliferation was observed in rin and nor tomato mutants. RIN and NOR are regulators of ethylene synthesis and ripening. A commercial tomato variety heterozygous for rin was less susceptible to Salmonella under the greenhouse conditions but not when tested in the field over three production seasons.