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Circadian oscillation of gibberellin signalling in Arabidopsis

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Circadian oscillation of gibberellin signalling in Arabidopsis

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dc.contributor.author Arana, María Verónica es_ES
dc.contributor.author Marín de la Rosa, Nora Alicia es_ES
dc.contributor.author Maloof, Jurin N. es_ES
dc.contributor.author Blazquez Rodriguez, Miguel Angel es_ES
dc.contributor.author Alabadí Diego, David es_ES
dc.date.accessioned 2017-05-29T07:31:44Z
dc.date.available 2017-05-29T07:31:44Z
dc.date.issued 2011-05-31
dc.identifier.issn 0027-8424
dc.identifier.uri http://hdl.handle.net/10251/81870
dc.description.abstract [EN] Circadian clocks are endogenous timekeeping mechanisms that allow organisms to anticipate rhythmic, daily environmental changes. Temporal coordination of transcription results in a set of gene expression patterns with peak levels occurring at precise times of the day. An intriguing question is how a single clock can generate different oscillatory rhythms, and it has been proposed that hormone signaling might act in plants as a relay mechanism to modulate the amplitude and the phase of output rhythms. Here we show that the circadian clock gates gibberellin (GA) signaling through transcriptional regulation of the GA receptors, resulting in higher stability of DELLA proteins during daytime and higher GA sensitivity at night. Oscillation of GA signaling appears to be particularly critical for rhythmic growth, given that constitutive expression of the GA receptor expands the daily growth period in seedlings, and complete loss of DELLA function causes continuous, arrhythmic hypocotyl growth. Moreover, transcriptomic analysis of a pentuple della KO mutant indicates that the GA pathway mediates the rhythmic expression of many clock-regulated genes related to biotic and abiotic stress responses and cell wall modification. Thus, gating of GA sensitivity by the circadian clock represents an additional layer of regulation that might provide extra robustness to the diurnal growth rhythm and constitute a regulatory module that coordinates the circadian clock with additional endogenous and environmental signals. es_ES
dc.description.sponsorship We are indebted to the Nottingham Arabidopsis Stock Centre, Stephen G. Thomas, Tai-ping Sun, and Nicholas P. Harberd for providing us with seeds. M. V. A. was the recipient of a postdoctoral contract from the Spanish Ministry of Science and Innovation for the mobility of young researchers into Spanish universities. N.A.M. holds a Consejo Superior de Investigaciones Cientificas Fellowship of the JAE-Pre program. This study was supported by Spanish Ministry of Science and Innovation Grants BIO2007-60923, BIO2010-15071, and CSD2007-00057; Generalitat Valenciana Grants ACOMP/2010/190; and National Science Foundation Grants DBI0820854 and IOS0923752. en_EN
dc.language Inglés es_ES
dc.publisher National Academy of Sciences es_ES
dc.relation Ministerio de Ciencia e Innovación, Spain [BIO2010-15071] [CSD2007-00057] es_ES
dc.relation Generalitat Valenciana [ACOMP/2010/190] es_ES
dc.relation National Science Foundation [DBI0820854 ] [IOS0923752] es_ES
dc.relation.ispartof Proceedings of the National Academy of Sciences es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Crosstalk es_ES
dc.subject Plasticity es_ES
dc.subject Light es_ES
dc.subject Photoperiod es_ES
dc.title Circadian oscillation of gibberellin signalling in Arabidopsis es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1073/pnas.1101050108
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Biología Molecular y Celular de Plantas - Institut Universitari Mixt de Biologia Molecular i Cel·lular de Plantes es_ES
dc.description.bibliographicCitation Arana, MV.; Marín De La Rosa, NA.; Maloof, JN.; Blazquez Rodriguez, MA.; Alabadí Diego, D. (2011). Circadian oscillation of gibberellin signalling in Arabidopsis. Proceedings of the National Academy of Sciences. 108(22):9292-9297. doi:10.1073/pnas.1101050108 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1073/pnas.1101050108 es_ES
dc.description.upvformatpinicio 9292 es_ES
dc.description.upvformatpfin 9297 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 108 es_ES
dc.description.issue 22 es_ES
dc.relation.senia 211867 es_ES
dc.identifier.pmcid PMC3107313


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