S6KDIURNALGROWTHARAB

Integrating cell growth and cell division with light signals and circadian clock function – the role of Arabidopsis S6 kinase in the regulation of the diurnal pattern of growth

Coordinatore	CENTRE DE RECERCA AGRIGENÒMICA CONSORCI CSIC-IRTA-UAB (CRAG)    more  Organization address address: Jordi Girona 18 city: BARCELONA postcode: 8034 contact info Titolo: Mr. Nome: Juan Antonio Cognome: Bermejo Ferre Email: send email Telefono: 34935636600
Nazionalità Coordinatore	Spain [ES]
Totale costo	100˙000 €
EC contributo	100˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2012-CIG
Funding Scheme	MC-CIG
Anno di inizio	2013
Periodo (anno-mese-giorno)	2013-03-01   -   2017-02-28

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	Nome Ente NON disponibile  Organization address address: Jordi Girona 18 city: BARCELONA postcode: 8034 contact info Titolo: Mr. Nome: Juan Antonio Cognome: Bermejo Ferre Email: send email Telefono: 34935636600	ES (BARCELONA)	coordinator	100˙000.00

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 Obiettivo del progetto (Objective)

'Light and the circadian clock control the timing of growth and neighbor sensing and are critical for proper regulation of fitness and biomass. At the intersection of these two pathways are the PIF transcription factors. However, although the components of both pathways are known, their downstream effectors are still poorly understood. In this proposal I plan to establish a functional connection between environmental perception and the molecular mechanisms controlling cell growth and proliferation, by looking at downstream outputs of light and the clock. I have previously shown that the growth-signalling regulator Arabidopsis 40S ribosomal protein S6 Kinase1 (S6K1) is also a inhibitor of cell division due to its ability to form a complex with RBR1 and E2FB. I found that S6K1 is co-expressed with CCA1, a major clock component and my preliminary data suggest that PIF and other circadian regulators could control S6K1 expression. I plan to confirm those observations and characterize the light and circadian regulation of S6K1 and also S6K2 both at transcriptional and post-translational levels. Moreover, I plan to extend this analysis to RBR1-E2FB and other regulators of cell growth and cell division. These findings will provide a better understanding of how cell growth and cell cycle regulation are connected and how the environment affects both. Furthermore, the characterization of these downstream regulators and their mode of action could allow the manipulation of plant yield under sub-optimal field conditions, and this knowledge could be transferred to other species with economic and agricultural importance.'