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Title

An evolutionarily conserved DOF-CONSTANS module controls plant photoperiodic signaling

AuthorsLucas-Reina, Eva CSIC; Romero-Campero, Francisco J. CSIC ORCID ; Romero, José M. ; Valverde, Federico CSIC ORCID
Issue Date2015
PublisherAmerican Society of Plant Biologists
Citation Plant Physiology, 168: 561- 574 (2015)
Abstract© 2015 American Society of Plant Biologists. All Rights Reserved. The response to daylength is a crucial process that evolved very early in plant evolution, entitling the early green eukaryote to predict seasonal variability and attune its physiological responses to the environment. The photoperiod responses evolved into the complex signaling pathways that govern the angiosperm floral transition today. The Chlamydomonas reinhardtii DNA-Binding with One Finger (CrDOF) gene controls transcription in a photoperiod-dependent manner, and its misexpression influences algal growth and viability. In short days, CrDOF enhances CrCO expression, a homolog of plant CONSTANS (CO), by direct binding to its promoter, while it reduces the expression of cell division genes in long days independently of CrCO. In Arabidopsis (Arabidopsis thaliana), transgenic plants overexpressing CrDOF show floral delay and reduced expression of the photoperiodic genes CO and FLOWERING LOCUS T. The conservation of the DOF-CO module during plant evolution could be an important clue to understanding diversification by the inheritance of conserved gene toolkits in key developmental programs.
URIhttp://hdl.handle.net/10261/122362
DOI10.1104/pp.15.00321
Identifiersdoi: 10.1104/pp.15.00321
issn: 1532-2548
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