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MtCRE1-dependent cytokinin signaling integrates bacterial and plant cues to coordinate symbiotic nodule organogenesis in Medicago truncatula

Plet, Julie; Wasson, Anton; Ariel, Federico; Le Signor, Christine; Mathesius, Ulrike; Baker, David; Crespi, Martin; Frugier, Florian

Description

Phytohormonal interactions are essential to regulate plant organogenesis. In response to the presence of signals from symbiotic bacteria, the Nod factors, legume roots generate a new organ: the nitrogen-fixing nodule. Analysis of mutants in the Medicago truncatula CRE1 cytokinin receptor and of the MtRR4 cytokinin primary response gene expression pattern revealed that cytokinin acts in initial cortical cell divisions and later in the transition between meristematic and differentiation zones of...[Show more]

dc.contributor.authorPlet, Julie
dc.contributor.authorWasson, Anton
dc.contributor.authorAriel, Federico
dc.contributor.authorLe Signor, Christine
dc.contributor.authorMathesius, Ulrike
dc.contributor.authorBaker, David
dc.contributor.authorCrespi, Martin
dc.contributor.authorFrugier, Florian
dc.date.accessioned2015-12-10T23:18:49Z
dc.identifier.issn0960-7412
dc.identifier.urihttp://hdl.handle.net/1885/65797
dc.description.abstractPhytohormonal interactions are essential to regulate plant organogenesis. In response to the presence of signals from symbiotic bacteria, the Nod factors, legume roots generate a new organ: the nitrogen-fixing nodule. Analysis of mutants in the Medicago truncatula CRE1 cytokinin receptor and of the MtRR4 cytokinin primary response gene expression pattern revealed that cytokinin acts in initial cortical cell divisions and later in the transition between meristematic and differentiation zones of the mature nodule. MtCRE1 signaling is required for activation of the downstream nodulation-related transcription factors MtERN1, MtNSP2 and MtNIN, as well as to regulate expression and accumulation of PIN auxin efflux carriers. Whereas the MtCRE1 pathway is required to allow the inhibition of polar auxin transport in response to rhizobia, nodulation is still negatively regulated by the MtEIN2/SICKLE- dependent ethylene pathway in cre1 mutants. Hence, MtCRE1 signaling acts as a regulatory knob, integrating positive plant and bacterial cues to control legume nodule organogenesis.
dc.publisherBlackwell Publishing Ltd
dc.sourceThe Plant Journal
dc.subjectKeywords: auxin; Auxin efflux carrier; Auxin transport; Cortical cells; EIN2/sickle; Gene expression patterns; Hormonal interaction; Legume nodules; Medicago truncatula; Nitrogen-fixing nodules; Nod factor; Nodulation; Nodule organogenesis; PIN efflux carrier; Plan auxin; EIN2/sickle; ethylene; hormonal interactions; nitrogen fixing nodulation; PIN efflux carrier
dc.titleMtCRE1-dependent cytokinin signaling integrates bacterial and plant cues to coordinate symbiotic nodule organogenesis in Medicago truncatula
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume65
dc.date.issued2011
local.identifier.absfor060705 - Plant Physiology
local.identifier.absfor060702 - Plant Cell and Molecular Biology
local.identifier.ariespublicationf2965xPUB1162
local.type.statusPublished Version
local.contributor.affiliationPlet, Julie, Centre National de la Recherche Scientifique
local.contributor.affiliationWasson, Anton, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationAriel, Federico, Instituto de Agrobiotecnolog─▒┬┤a del Litoral
local.contributor.affiliationLe Signor, Christine , Institut National de la Recherche Agronomique
local.contributor.affiliationMathesius, Ulrike, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationBaker, David, John Innes Genome Laboratory
local.contributor.affiliationCrespi, Martin, Institut des Sciences du Vegetal
local.contributor.affiliationFrugier, Florian , Institute des Sciences du Vegetal
local.description.embargo2037-12-31
local.bibliographicCitation.startpage622
local.bibliographicCitation.lastpage633
local.identifier.doi10.1111/j.1365-313X.2010.04447.x
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2016-02-24T08:09:46Z
local.identifier.scopusID2-s2.0-79551653507
local.identifier.thomsonID000286886100011
CollectionsANU Research Publications

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