Artículo
Photoperiodic control of carbon distribution during the floral transition in Arabidopsis
Autor/es | Ortíz Marchena, M Isabel
Albi Rodríguez, Tomás Lucas Reina, Eva Said, Fátima E. Romero Campero, Francisco José Cano Ruiz, Beatriz Ruiz, M. Teresa Romero Rodríguez, José María Valverde Albacete, Federico |
Departamento | Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular |
Fecha de publicación | 2014 |
Fecha de depósito | 2018-01-29 |
Publicado en |
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Resumen | Flowering is a crucial process that demands substantial resources. Carbon metabolism must be coordinated with development through a control mechanism that optimizes fitness for any physiological need and growth stage of ... Flowering is a crucial process that demands substantial resources. Carbon metabolism must be coordinated with development through a control mechanism that optimizes fitness for any physiological need and growth stage of the plant. However, how sugar allocation is controlled during the floral transition is unknown. Recently, the role of a CONSTANS (CO) ortholog (Cr-CO) in the control of the photoperiod response in the green alga Chlamydomonas reinhardtii and its influence on starch metabolism was demonstrated. In this work, we show that transitory starch accumulation and glycan composition during the floral transition in Arabidopsis thaliana are regulated by photoperiod. Employing a multidisciplinary approach, we demonstrate a role for CO in regulating the level and timing of expression of the GRANULE BOUND STARCH SYNTHASE (GBSS) gene. Furthermore, we provide a detailed characterization of a GBSS mutant involved in transitory starch synthesis and analyze its flowering time phenotype in relation to its altered capacity to synthesize amylose and to modify the plant free sugar content. Photoperiod modification of starch homeostasis by CO may be crucial for increasing the sugar mobilization demanded by the floral transition. This finding contributes to our understanding of the flowering process |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España Junta de Andalucía |
Identificador del proyecto | CSD2007-00057
BIO2008-02292 BIO2011-28847-C02-00 P06-CVI-01450 P08-AGR-03582 |
Cita | Ortíz Marchena, M.I., Albi Rodríguez, T., Lucas Reina, E., Said, F.E., Romero Campero, F.J., Cano Ruiz, B.,...,Valverde Albacete, F. (2014). Photoperiodic control of carbon distribution during the floral transition in Arabidopsis. Plant Cell, 26, 565-584. |
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