Genes of the RAV family control heading date and carpel development in rice
Osnato, Michela (Centre de Recerca en Agrigenòmica)
Matías Hernández, Luis (Centre de Recerca en Agrigenòmica)
Aguilar Jaramillo, Andrea Elizabeth (Centre de Recerca en Agrigenòmica)
Kater, Martin M. (Università degli Studi di Milano Statale. Dipartimento di Bioscienze)
Pelaz, Soraya (Centre de Recerca en Agrigenòmica)

Date:	2020
Abstract:	In plants, correct formation of reproductive organs is critical for successful seedset and perpetuation of the species. Plants have evolved different molecular mechanisms to coordinate flower and seed development at the proper time of the year. Among the plant-specific RELATED TO ABI3 AND VP1 (RAV) family of transcription factors, only TEMPRANILLO1 (TEM1) and TEM2 have been shown to affect reproductive development in Arabidopsis (Arabidopsis thaliana). They negatively regulate the floral transition through direct repression of FLOWERING LOCUS T and GIBBERELLIN 3-OXIDASE1/2, encoding major components of the florigen. Here we identify RAV genes from rice (Oryza sativa), and unravel their regulatory roles in key steps of reproductive development. Our data strongly suggest that, like TEMs, OsRAV9/OsTEM1 has a conserved function as a repressor of photoperiodic flowering upstream of the floral activators OsMADS14 and Hd3a, through a mechanism reminiscent of that one underlying floral transition in temperate cereals. Furthermore, OsRAV11 and OsRAV12 may have acquired a new function in the differentiation of the carpel and the control of seed size, acting downstream of floral homeotic factors. Alternatively, this function may have been lost in Arabidopsis. Our data reveal conservation of RAV gene function in the regulation of flowering time in monocotyledonous and dicotyledonous plants, but also unveil roles in the development of rice gynoecium.
Grants:	Ministerio de Economía y Competitividad BFU2015-64409-P Ministerio de Economía y Competitividad SEV-2015-0533 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1406
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Plant Physiology, Vol. 183, issue 4 (Aug. 2020) , p. 1663-1680, ISSN 0032-0889

DOI: 10.1104/pp.20.00562
PMID: 32554473

Publicat 18 p, 1.7 MB

Postprint 52 p, 2.0 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CRAG (Centre for Research in Agricultural Genomics)
Articles > Research articles
Articles > Published articles