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dc.contributor.authorBhardwaj, Vaibhav
dc.contributor.authorMeier, Stuart Kurt
dc.contributor.authorPetersen, Lindsay N.
dc.contributor.authorIngle, Robert A.
dc.contributor.authorRoden, Laura C.
dc.date.accessioned2014-08-27T09:45:39Z
dc.date.available2014-08-27T09:45:39Z
dc.date.issued2011-10-31
dc.identifier.citationBhardwaj V, Meier S, Petersen LN, Ingle RA, Roden LC (2011) Defence Responses of Arabidopsis thaliana to Infection by Pseudomonas syringae Are Regulated by the Circadian Clock. PLoS ONE 6: e26968. doi:10.1371/journal.pone.0026968.
dc.identifier.issn19326203
dc.identifier.pmid22066021
dc.identifier.doi10.1371/journal.pone.0026968
dc.identifier.urihttp://hdl.handle.net/10754/325297
dc.description.abstractThe circadian clock allows plants to anticipate predictable daily changes in abiotic stimuli, such as light; however, whether the clock similarly allows plants to anticipate interactions with other organisms is unknown. Here we show that Arabidopsis thaliana (Arabidopsis) has circadian clock-mediated variation in resistance to the virulent bacterial pathogen Pseudomonas syringae pv. tomato DC3000 (Pst DC3000), with plants being least susceptible to infection in the subjective morning. We suggest that the increased resistance to Pst DC3000 observed in the morning in Col-0 plants results from clock-mediated modulation of pathogen associated molecular pattern (PAMP)-triggered immunity. Analysis of publicly available microarray data revealed that a large number of Arabidopsis defence-related genes showed both diurnal- and circadian-regulation, including genes involved in the perception of the PAMP flagellin which exhibit a peak in expression in the morning. Accordingly, we observed that PAMP-triggered callose deposition was significantly higher in wild-type plants inoculated with Pst DC3000 hrpA in the subjective morning than in the evening, while no such temporal difference was evident in arrhythmic plants. Our results suggest that PAMP-triggered immune responses are modulated by the circadian clock and that temporal regulation allows plants to anticipate and respond more effectively to pathogen challenges in the daytime. © 2011 Bhardwaj et al.
dc.language.isoen
dc.publisherPublic Library of Science (PLoS)
dc.rightsBhardwaj et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
dc.rightsArchived with thanks to PLoS ONE
dc.subjectflagellin
dc.subjectArabidopsis protein
dc.subjectcallose
dc.subjectglucan
dc.subjectpattern recognition receptor
dc.subjecttranscription factor CLOCK
dc.subjectArabidopsis
dc.subjectbacterial plant disease
dc.subjectcircadian rhythm
dc.subjectcontrolled study
dc.subjectgene expression profiling
dc.subjectinfection resistance
dc.subjectinfection sensitivity
dc.subjectplant defense
dc.subjectplant gene
dc.subjectplant immunity
dc.subjectPseudomonas syringae
dc.subjectcell wall
dc.subjectdisease predisposition
dc.subjectgene expression regulation
dc.subjectgenetics
dc.subjectimmunology
dc.subjectlight
dc.subjectmetabolism
dc.subjectmicrobiology
dc.subjectmutation
dc.subjectpathogenicity
dc.subjectphysiology
dc.subjectplant disease
dc.subjectradiation exposure
dc.subjectsignal transduction
dc.subjecttime
dc.subjectvirulence
dc.subjectArabidopsis
dc.subjectArabidopsis thaliana
dc.subjectBacteria (microorganisms)
dc.subjectPseudomonas syringae
dc.subjectPseudomonas syringae pv. tomato
dc.subjectArabidopsis
dc.subjectArabidopsis Proteins
dc.subjectCell Wall
dc.subjectCircadian Clocks
dc.subjectCircadian Rhythm
dc.subjectCLOCK Proteins
dc.subjectDisease Susceptibility
dc.subjectGene Expression Profiling
dc.subjectGene Expression Regulation, Plant
dc.subjectGenes, Plant
dc.subjectGlucans
dc.subjectLight
dc.subjectMutation
dc.subjectPlant Diseases
dc.subjectPseudomonas syringae
dc.subjectReceptors, Pattern Recognition
dc.subjectSignal Transduction
dc.subjectTime Factors
dc.subjectVirulence
dc.titleDefence responses of arabidopsis thaliana to infection by pseudomonas syringae are regulated by the circadian clock
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalPLoS ONE
dc.identifier.pmcidPMC3205005
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Molecular and Cell Biology, University of Cape Town, Rondebosch, South Africa
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personMeier, Stuart Kurt
refterms.dateFOA2018-06-13T14:50:40Z


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