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dc.contributor.author
Tilmes, Vicky
dc.contributor.author
Mateos, Julieta Lisa
dc.contributor.author
Madrid, Eva
dc.contributor.author
Vincent, Coral
dc.contributor.author
Severing, Edouard
dc.contributor.author
Carrera, Esther
dc.contributor.author
López Díaz, Isabel
dc.contributor.author
Coupland, George
dc.date.available
2020-02-03T21:23:17Z
dc.date.issued
2019-07
dc.identifier.citation
Tilmes, Vicky; Mateos, Julieta Lisa; Madrid, Eva; Vincent, Coral; Severing, Edouard; et al.; Gibberellins act downstream of Arabis PERPETUAL FLOWERING1 to accelerate floral induction during vernalization; American Society of Plant Biologist; Plant Physiology; 180; 3; 7-2019; 1549-1563
dc.identifier.issn
0032-0889
dc.identifier.uri
http://hdl.handle.net/11336/96642
dc.description.abstract
Regulation of flowering by endogenous and environmental signals ensures that reproduction occurs under optimal conditions to maximize reproductive success. Involvement of the growth regulator gibberellin (GA) in the control of flowering by environmental cues varies among species. Arabis alpina Pajares, a model perennial member of the Brassicaceae, only undergoes floral induction during vernalization, allowing definition of the role of GA specifically in this process. The transcription factor PERPETUAL FLOWERING1 (PEP1) represses flowering until its mRNA levels are reduced during vernalization. Genome-wide analyses of PEP1 targets identified genes involved in GA metabolism and signaling, and many of the binding sites in these genes were specific to the A. alpina lineage. Here, we show that the pep1 mutant exhibits an elongated-stem phenotype, similar to that caused by treatment with exogenous GA, consistent with PEP1 repressing GA responses. Moreover, in comparison with the wild type, the pep1 mutant contains higher GA4 levels and is more sensitive to GA prior to vernalization. Upon exposure to cold temperatures, GA levels fall to low levels in the pep1 mutant and in wild-type plants, but GA still promotes floral induction and the transcription of floral meristem identity genes during vernalization. Reducing GA levels strongly impairs flowering and inflorescence development in response to short vernalization treatments, but longer treatments overcome the requirement for GA. Thus, GA accelerates the floral transition during vernalization in A. alpina, the down-regulation of PEP1 likely increases GA sensitivity, and GA responses contribute to determining the length of vernalization required for flowering and reproduction.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Society of Plant Biologist
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
GIBBERELLINS
dc.subject
FLORAL INDUCTION
dc.subject
VERNALIZATION
dc.subject.classification
Bioquímica y Biología Molecular
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Gibberellins act downstream of Arabis PERPETUAL FLOWERING1 to accelerate floral induction during vernalization
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-12-11T20:21:18Z
dc.journal.volume
180
dc.journal.number
3
dc.journal.pagination
1549-1563
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Rockville
dc.description.fil
Fil: Tilmes, Vicky. Max-planck-institute For Plant Breeding Research; Alemania
dc.description.fil
Fil: Mateos, Julieta Lisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentina
dc.description.fil
Fil: Madrid, Eva. Max-planck-institute For Plant Breeding Research; Alemania
dc.description.fil
Fil: Vincent, Coral. Max-planck-institute For Plant Breeding Research; Alemania
dc.description.fil
Fil: Severing, Edouard. Max-planck-institute For Plant Breeding Research; Alemania
dc.description.fil
Fil: Carrera, Esther. Universidad Politécnica de Valencia; España
dc.description.fil
Fil: López Díaz, Isabel. Universidad Politécnica de Valencia; España
dc.description.fil
Fil: Coupland, George. Max-planck-institute For Plant Breeding Research; Alemania
dc.journal.title
Plant Physiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.plantphysiol.org/content/180/3/1549
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1104/pp.19.00021
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