Artículo
Pseudomonas syringae Differentiates into Phenotypically Distinct Subpopulations During Colonization of a Plant Host
Autor/es | Rufián, José S.
Sánchez Romero, María Antonia López Márquez, Diego Macho, Alberto P. Mansfield, John W. Arnold, Dawn L. Ruiz Albert, Javier Casadesús Pursals, Josep Beuzón, Carmen R. |
Departamento | Universidad de Sevilla. Departamento de Genética |
Fecha de publicación | 2016 |
Fecha de depósito | 2022-03-24 |
Publicado en |
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Resumen | Bacterial microcolonies with heterogeneous sizes are formed during colonization of Phaseolus vulgaris by Pseudomonas syringae. Heterogeneous expression of structural and regulatory components of the P. syringae type III ... Bacterial microcolonies with heterogeneous sizes are formed during colonization of Phaseolus vulgaris by Pseudomonas syringae. Heterogeneous expression of structural and regulatory components of the P. syringae type III secretion system (T3SS), essential for colonization of the host apoplast and disease development, is likewise detected within the plant apoplast. T3SS expression is bistable in the homogeneous environment of nutrient-limited T3SS-inducing medium, suggesting that subpopulation formation is not a response to different environmental cues. T3SS bistability is reversible, indicating a non-genetic origin, and the T3SSHIGH and T3SSLOW subpopulations show differences in virulence. T3SS bistability requires the transcriptional activator HrpL, the double negative regulatory loop established by HrpV and HrpG, and may be enhanced through a positive feedback loop involving HrpA, the main component of the T3SS pilus. To our knowledge, this is the first example of phenotypic heterogeneity in the expression of virulence determinants during colonization of a non-mammalian host. |
Identificador del proyecto | BIO2009-11516
AGL2010-22287-C02-2 BIO2012-35641 BIO2015-64391- R |
Cita | Rufián, J.S., Sánchez Romero, M.A., López Márquez, D., Macho, A.P., Mansfield, J.W., Arnold, D.L.,...,Beuzón, C.R. (2016). Pseudomonas syringae Differentiates into Phenotypically Distinct Subpopulations During Colonization of a Plant Host. Environmental Microbiology, 18 (10), 3593-3605. |
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