Artículo
Phytochrome control of the Arabidopsis transcriptome anticipates seedling exposure to light
Mazzella, Maria Agustina
; Arana, Maria Veronica
; Staneloni, Roberto Julio
; Perelman, Susana Beatriz; Rodríguez Batiller, María Jose
; Muschietti, Jorge Prometeo
; Cerdan, Pablo Diego
; Chen, Kunhua; Sanchez, Rodolfo Augusto
; Zhu, Tong; Chory, Joanne; Casal, Jorge José
Fecha de publicación:
12/2005
Editorial:
American Society of Plant Biologist
Revista:
Plant Cell
ISSN:
1040-4651
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Phytochromes mediate a profound developmental shift when dark-grown seedlings are exposed to light. Here, we show that a subset of genes is upregulated in phytochrome B (phyB) mutants even before dark-grown Arabidopsis thaliana seedlings are exposed to light. Most of these genes bear the RY cis motif, which is a binding site of the transcription factor ABSCISIC ACID INSENSITIVE3 (ABI3), and the phyB mutation also enhances ABI3 expression. These changes in transcriptome have physiological consequences, because seedlings of the abi3 mutant showed enhanced responses to pulses of far-red light, whereas ABI3 overexpressers exhibited the opposite pattern. Seedlings of the wild type derived from seeds germinated in full darkness showed enhanced expression of genes bearing the RY cis motif and reduced responses to farred light. We propose that, via changes in ABI3 expression, light, perceived mainly by phyB in the seed, generates a downstream transdevelopmental phase signal that preconditions the seedling to its most likely environment.
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Articulos(INGEBI)
Articulos de INST.DE INVEST.EN ING.GENETICA Y BIOL.MOLECULAR "DR. HECTOR N TORRES"
Articulos de INST.DE INVEST.EN ING.GENETICA Y BIOL.MOLECULAR "DR. HECTOR N TORRES"
Citación
Mazzella, Maria Agustina; Arana, Maria Veronica; Staneloni, Roberto Julio; Perelman, Susana Beatriz; Rodríguez Batiller, María Jose; et al.; Phytochrome control of the Arabidopsis transcriptome anticipates seedling exposure to light; American Society of Plant Biologist; Plant Cell; 17; 9; 12-2005; 2507-2516
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