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bacteria:t3e:xopx

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bacteria:t3e:xopx [2025/11/05 16:45] – jfpothierbacteria:t3e:xopx [2025/11/05 16:46] (current) – jfpothier
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   * XopX is required for the development of //X. euvesicatoria//- induced symptoms in the bacterial spot disease of tomato (//Solanum lycopersicum//) and pepper (//Capsicum annuum//). Indeed, it promotes ethylene production, and therefore chlorosis and plant cell death during infection by //X. euvesicatoria// of susceptible tomato and in transient expression assays in tobacco. Interestingly, it also suppresses flagellin-induced production of reactive oxygen species (ROS) while promoting the accumulation of pattern-triggered immunity (PTI) gene transcripts (Stork //et al//., 2015). Eventually, the complex behavior of XopX //in planta//, which combines activation and suppression of immunity-related plant responses at the same time, allows to classify this effector with the T3Es that activates the plant ‘default to death and defense’ response (Lindeberg //et al//., 2012; Stork //et al//., 2015).   * XopX is required for the development of //X. euvesicatoria//- induced symptoms in the bacterial spot disease of tomato (//Solanum lycopersicum//) and pepper (//Capsicum annuum//). Indeed, it promotes ethylene production, and therefore chlorosis and plant cell death during infection by //X. euvesicatoria// of susceptible tomato and in transient expression assays in tobacco. Interestingly, it also suppresses flagellin-induced production of reactive oxygen species (ROS) while promoting the accumulation of pattern-triggered immunity (PTI) gene transcripts (Stork //et al//., 2015). Eventually, the complex behavior of XopX //in planta//, which combines activation and suppression of immunity-related plant responses at the same time, allows to classify this effector with the T3Es that activates the plant ‘default to death and defense’ response (Lindeberg //et al//., 2012; Stork //et al//., 2015).
   * XopX is required for full virulence in //Xanthomonas axonopodis// pv. //manihotis// CIO151 strain. A //Xam// strain deleted for //xopX//  showed decreased ability to produce symptoms in leaves of cassava. Also, the //xopX// KO reached more than one log unit lower populations than those observed for the wild‐type strain. This underlies the importance of this effector for disease developement (Medina //et al//., 2018).   * XopX is required for full virulence in //Xanthomonas axonopodis// pv. //manihotis// CIO151 strain. A //Xam// strain deleted for //xopX//  showed decreased ability to produce symptoms in leaves of cassava. Also, the //xopX// KO reached more than one log unit lower populations than those observed for the wild‐type strain. This underlies the importance of this effector for disease developement (Medina //et al//., 2018).
-  * When expressed in //Pseudomonas fluorescens// 55 (//Pf//55), a non‐pathogenic bacterium capable of eliciting PTI (callose deposit) in //Arabidopsis// Col‐0 plants, XopX is not able to reduce callose deposit, suggesting in these conditions, the effector is not able to suppress PTI. Using the same heterologuous system, XopX is not able to suppress the HR triggered by Pf 55 HopA1 on tobacco, suggesting that is these conditions, XopX do not act as an ETI suppressor. (Medina //et al//., 2018).+  * When expressed in //Pseudomonas fluorescens// 55 (//Pf//55), a non‐pathogenic bacterium capable of eliciting PTI (callose deposit) in //Arabidopsis// Col‐0 plants, XopX is not able to reduce callose deposit, suggesting in these conditions, the effector is not able to suppress PTI. Using the same heterologous system, XopX is not able to suppress the HR triggered by Pf 55 HopA1 on tobacco, suggesting that is these conditions, XopX do not act as an ETI suppressor. (Medina //et al//., 2018).
   * When transiently expressed in //N. benthamiana// by //Agrobacterium tumefaciens//–mediated expression system, XopX from //X. oryzae// pv. //oryzicola// cause the nonhost HR at approximately 2 days (Li //et al., //2015).   * When transiently expressed in //N. benthamiana// by //Agrobacterium tumefaciens//–mediated expression system, XopX from //X. oryzae// pv. //oryzicola// cause the nonhost HR at approximately 2 days (Li //et al., //2015).
   * A ∆//xopX// mutant strain of //Xanthomonas phaseoli// pv. //manihotis// (aka //Xanthomonas axonopodis// pv. //manihotis//) showed reduced growth //in planta// and delayed spread through the vascular system of cassava (Mutka //et al.//, 2016).   * A ∆//xopX// mutant strain of //Xanthomonas phaseoli// pv. //manihotis// (aka //Xanthomonas axonopodis// pv. //manihotis//) showed reduced growth //in planta// and delayed spread through the vascular system of cassava (Mutka //et al.//, 2016).
bacteria/t3e/xopx.txt · Last modified: 2025/11/05 16:46 by jfpothier

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