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Plant-derived auxin plays an accessory role in symptom development upon Rhodococcus fascians infection.
Plant J. 2012 May; 70(3):513-27.PJ

Abstract

The biotrophic phytopathogen Rhodococcus fascians has a profound impact on plant development, mainly through its principal virulence factors, a mix of synergistically acting cytokinins that induce shoot formation. Expression profiling of marker genes for several auxin biosynthesis routes and mutant analysis demonstrated that the bacterial cytokinins stimulate the auxin biosynthesis of plants via specific targeting of the indole-3-pyruvic acid (IPA) pathway, resulting in enhanced auxin signaling in infected tissues. The double mutant tryptophan aminotransferase 1-1 tryptophan aminotransferase related 2-1 (taa1-1 tar2-1) of Arabidopsis (Arabidopsis thaliana), in which the IPA pathway is defective, displayed a decreased responsiveness towards R. fascians infection, although bacterial colonization and virulence gene expression were not impaired. These observations implied that plant-derived auxin was employed to reinforce symptom formation. Furthermore, the increased auxin production and, possibly, the accumulating bacterial cytokinins in infected plants modified the polar auxin transport so that new auxin maxima were repetitively established and distributed, a process that is imperative for symptom onset and maintenance. Based on these findings, we extend our model of the mode of action of bacterial and plant signals during the interaction between R. fascians and Arabidopsis.

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Authors+Show Affiliations

Stes E
Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium.
Prinsen E
No affiliation info available
Holsters M
No affiliation info available
Vereecke D
No affiliation info available

MeSH

ArabidopsisBiological TransportCytokininsGene Expression Regulation, PlantHost-Pathogen InteractionsIndoleacetic AcidsIndolesModels, BiologicalMutationPlant Components, AerialPlant DiseasesPlant Growth RegulatorsPlant LeavesRNA, PlantReverse Transcriptase Polymerase Chain ReactionRhodococcusSignal TransductionTryptophan TransaminaseVirulence

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22181713

Citation

Stes, Elisabeth, et al. "Plant-derived Auxin Plays an Accessory Role in Symptom Development Upon Rhodococcus Fascians Infection." The Plant Journal : for Cell and Molecular Biology, vol. 70, no. 3, 2012, pp. 513-27.
Stes E, Prinsen E, Holsters M, et al. Plant-derived auxin plays an accessory role in symptom development upon Rhodococcus fascians infection. Plant J. 2012;70(3):513-27.
Stes, E., Prinsen, E., Holsters, M., & Vereecke, D. (2012). Plant-derived auxin plays an accessory role in symptom development upon Rhodococcus fascians infection. The Plant Journal : for Cell and Molecular Biology, 70(3), 513-27. https://doi.org/10.1111/j.1365-313X.2011.04890.x
Stes E, et al. Plant-derived Auxin Plays an Accessory Role in Symptom Development Upon Rhodococcus Fascians Infection. Plant J. 2012;70(3):513-27. PubMed PMID: 22181713.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Plant-derived auxin plays an accessory role in symptom development upon Rhodococcus fascians infection. AU - Stes,Elisabeth, AU - Prinsen,Els, AU - Holsters,Marcelle, AU - Vereecke,Danny, Y1 - 2012/02/14/ PY - 2011/12/21/entrez PY - 2011/12/21/pubmed PY - 2012/12/10/medline SP - 513 EP - 27 JF - The Plant journal : for cell and molecular biology JO - Plant J VL - 70 IS - 3 N2 - The biotrophic phytopathogen Rhodococcus fascians has a profound impact on plant development, mainly through its principal virulence factors, a mix of synergistically acting cytokinins that induce shoot formation. Expression profiling of marker genes for several auxin biosynthesis routes and mutant analysis demonstrated that the bacterial cytokinins stimulate the auxin biosynthesis of plants via specific targeting of the indole-3-pyruvic acid (IPA) pathway, resulting in enhanced auxin signaling in infected tissues. The double mutant tryptophan aminotransferase 1-1 tryptophan aminotransferase related 2-1 (taa1-1 tar2-1) of Arabidopsis (Arabidopsis thaliana), in which the IPA pathway is defective, displayed a decreased responsiveness towards R. fascians infection, although bacterial colonization and virulence gene expression were not impaired. These observations implied that plant-derived auxin was employed to reinforce symptom formation. Furthermore, the increased auxin production and, possibly, the accumulating bacterial cytokinins in infected plants modified the polar auxin transport so that new auxin maxima were repetitively established and distributed, a process that is imperative for symptom onset and maintenance. Based on these findings, we extend our model of the mode of action of bacterial and plant signals during the interaction between R. fascians and Arabidopsis. SN - 1365-313X UR - https://www.unboundmedicine.com/medline/citation/22181713/Plant_derived_auxin_plays_an_accessory_role_in_symptom_development_upon_Rhodococcus_fascians_infection_ L2 - https://doi.org/10.1111/j.1365-313X.2011.04890.x DB - PRIME DP - Unbound Medicine ER -