Photoperiodic control of carbon distribution during the floral transition in Arabidopsis
| Autor: | T. Albi, Fatima E. Said, M. Isabel Ortiz-Marchena, M. Teresa Ruiz, Beatriz Cano, José M. Romero, Francisco J. Romero-Campero, Eva Lucas-Reina, Federico Valverde |
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| Přispěvatelé: | Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular, Ministerio de Economía y Competitividad (MINECO). España, Junta de Andalucía |
| Rok vydání: | 2014 |
| Předmět: |
endocrine system
Starch Photoperiod Mutant Arabidopsis Chlamydomonas reinhardtii Flowers Plant Science Models Biological chemistry.chemical_compound Gene Expression Regulation Plant Arabidopsis thaliana RNA Messenger Sugar reproductive and urinary physiology Research Articles Regulation of gene expression photoperiodism biology Arabidopsis Proteins fungi food and beverages Cell Biology Plants Genetically Modified biology.organism_classification Carbon Gene Ontology Solubility chemistry Biochemistry Mutation |
| Zdroj: | idUS. Depósito de Investigación de la Universidad de Sevilla instname Digital.CSIC. Repositorio Institucional del CSIC |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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