Biocontrol of Soft Rot: Confocal Microscopy Highlights Virulent Pectobacterial Communication and Its Jamming by Rhodococcal Quorum-Quenching

0507905 - MBÚ 2020 RIV US eng J - Journal Article
Chane, A. - Barbey, C. - Robert, M. - Merieau, A. - Konto-Ghiorghi, Y. - Beury-Cirou, A. - Feuilloley, M. - Pátek, Miroslav - Gobert, V. - Latour, X.
Biocontrol of Soft Rot: Confocal Microscopy Highlights Virulent Pectobacterial Communication and Its Jamming by Rhodococcal Quorum-Quenching.
Molecular Plant-Microbe Interactions. Roč. 32, č. 7 (2019), s. 802-812. ISSN 0894-0282. E-ISSN 1943-7706
Institutional support: RVO:61388971
Keywords : green fluorescent protein * lactone-mediated communication * n-acylhomoserine lactones
OECD category: Microbiology
Impact factor: 3.696, year: 2019
Method of publishing: Limited access
https://apsjournals.apsnet.org/doi/10.1094/MPMI-11-18-0314-R

Confocal laser-scanning microscopy was chosen to observe the colonization and damage caused by the soft rot Pectobacterium atrosepticum and the protection mediated by the biocontrol agent Rhodococcus erythropolis. We developed dual-color reporter strains suited for monitoring quorum-sensing and quorum-quenching activities leading to maceration or biocontrol, respectively. A constitutively expressed cyan or red fluorescent protein served as a cell tag for plant colonization, while an inducible expression reporter system based on the green fluorescent protein gene enabled the simultaneous recording of signaling molecule production, detection, or degradation. The dual-colored pathogen and biocontrol strains were used to coinoculate potato tubers. At cellular quorum, images revealed a strong pectobacterial quorum-sensing activity, especially at the plant cell walls, as well as a concomitant rhodococcal quorum-quenching response, at both the single-cell and microcolony levels. The generated biosensors appear to be promising and complementary tools useful for molecular and cellular studies of bacterial communication and interference.
Permanent Link: http://hdl.handle.net/11104/0298868