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Artículo

The LNK gene family: At the crossroad between light signaling and the circadian clock

de Leone, María JoséIcon ; Hernando, Carlos EstebanIcon ; Romanowski, AndrésIcon ; García Hourquet, Mariano; Careno, Daniel AlejandroIcon ; Casal, Joaquín; Rugnone, Matias LeandroIcon ; Mora Garcia, SantiagoIcon ; Yanovsky, Marcelo JavierIcon
Fecha de publicación: 01/2019
Editorial: Molecular Diversity Preservation International
Revista: Genes
ISSN: 2073-4425
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Bioquímica y Biología Molecular

Resumen

Light signaling pathways interact with the circadian clock to help organisms synchronize physiological and developmental processes to periodic environmental cycles. The plant photoreceptors responsible for clock resetting have been characterized, but signaling components that link the photoreceptors to the clock remain to be identified. Members of the family of NIGHT LIGHT–INDUCIBLE AND CLOCK-REGULATED (LNK) genes play key roles linking light regulation of gene expression to the control of daily and seasonal rhythms in Arabidopsis thaliana. Particularly, LNK1 and LNK2 were shown to control circadian rhythms, photomorphogenic responses, and photoperiod-dependent flowering time. Here we analyze the role of the four members of the LNK family in Arabidopsis in these processes. We found that depletion of the closely related LNK3 and LNK4 in a lnk1;lnk2 mutant background affects circadian rhythms, but not other clock-regulated processes such as flowering time and seedling photomorphogenesis. Nevertheless, plants defective in all LNK genes (lnkQ quadruple mutants) display developmental alterations that lead to increased rosette size, biomass, and enhanced phototropic responses. Our work indicates that members of the LNK family have both distinctive and partially overlapping functions, and are an essential link to orchestrate light-regulated developmental processes.
Palabras clave: CIRCADIAN ACTIVATORS , CIRCADIAN CLOCK , INDUCIBLE AND CLOCK-REGULATED , LIGHT SIGNALING , NIGHT LIGHT , PHOTOTROPISM
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/88964
URL: http://www.mdpi.com/2073-4425/10/1/2
DOI: http://dx.doi.org/10.3390/genes10010002
Colecciones
Articulos(IIBBA)
Articulos de INST.DE INVEST.BIOQUIMICAS DE BS.AS(I)
Citación
de Leone, María José; Hernando, Carlos Esteban; Romanowski, Andrés; García Hourquet, Mariano; Careno, Daniel Alejandro; et al.; The LNK gene family: At the crossroad between light signaling and the circadian clock; Molecular Diversity Preservation International; Genes; 10; 1-2019; 1-18
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