Coping with environmental eukaryotes; identification of Pseudomonas syringae genes during the interaction with alternative hosts or predators
| Autor: | Tanya Arseneault, Liz J. Shaw, Glyn A. Barrett, Robert W. Jackson, Primitivo Caballero, Mateo San José, Federico Dorati, David J. Studholme, María Sánchez-Contreras, Jesús Murillo, Nicholas R. Waterfield, Dawn L. Arnold |
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| Přispěvatelé: | IdAB - Instituto de Agrobiotecnología / Agrobioteknologiako Institutua |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Microbiology (medical) 030106 microbiology rapid virulence annotation Acanthamoeba polyphaga Virulence Pseudomonas syringae anti-predation Rapid virulence annotation Biology medicine.disease_cause Microbiology Article Predation 03 medical and health sciences Anti-predation Virology medicine Caenorhabditis elegans Pathogen lcsh:QH301-705.5 Genetics Herbivore QK Pseudomonas fungi Pathogenic bacteria biology.organism_classification QR RVA 030104 developmental biology lcsh:Biology (General) pathogen Galleria mellonella pseudomonas syringae rapid virulence annotation RVA pathogen anti-predation Caenorhabditis elegans Acanthamoeba polyphaga Galleria mellonella Centre for Research in Biosciences Bacteria |
| Zdroj: | Academica-e: Repositorio Institucional de la Universidad Pública de Navarra Universidad Pública de Navarra Microorganisms, Vol 6, Iss 2, p 32 (2018) Academica-e. Repositorio Institucional de la Universidad Pública de Navarra instname Microorganisms; Volume 6; Issue 2; Pages: 32 Microorganisms |
| ISSN: | 2076-2607 |
| Popis: | Understanding the molecular mechanisms underpinning the ecological success of plant pathogens is critical to develop strategies for controlling diseases and protecting crops. Recent observations have shown that plant pathogenic bacteria, particularly Pseudomonas, exist in a range of natural environments away from their natural plant host e.g., water courses, soil, non-host plants. This exposes them to a variety of eukaryotic predators such as nematodes, insects and amoebae present in the environment. Nematodes and amoeba in particular are bacterial predators while insect herbivores may act as indirect predators, ingesting bacteria on plant tissue. We therefore postulated that bacteria are probably under selective pressure to avoid or survive predation and have therefore developed appropriate coping mechanisms. We tested the hypothesis that plant pathogenic Pseudomonas syringae are able to cope with predation pressure and found that three pathovars show weak, but significant resistance or toxicity. To identify the gene systems that contribute to resistance or toxicity we applied a heterologous screening technique, called Rapid Virulence Annotation (RVA), for anti-predation and toxicity mechanisms. Three cosmid libraries for P. syringae pv. aesculi, pv. tomato and pv. phaseolicola, of approximately 2000 cosmids each, were screened in the susceptible/non-toxic bacterium Escherichia coli against nematode, amoebae and an insect. A number of potential conserved and unique genes were identified which included genes encoding haemolysins, biofilm formation, motility and adhesion. These data provide the first multi-pathovar comparative insight to how plant pathogens cope with different predation pressures and infection of an insect gut and provide a foundation for further study into the function of selected genes and their role in ecological success. All work was funded by the University of Reading. |
| Databáze: | OpenAIRE |
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