Repression of shade - avoidance reactions by sunfleck induction of HY5 expression in Arabidopsis

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The light environment provides signals that play a critical role in the control of stem growth in plants. The reduced irradiance and altered spectral composition of shade light promote stem growth compared with unfiltered sunlight. However, whereas most studies have used seedlings exposed to contras...

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Detalles Bibliográficos
Autor principal: Sellaro, Romina
Otros Autores: Yanovsky, Marcelo J., Casal, Jorge José
Formato: Artículo
Lenguaje:Inglés
Materias:
ARABIDOPSIS
AUXIN
HY5
HYPOCOTYL
PHYTOCHROME
SHADE AVOIDANCE
BIOLOGY
PLANTS [BOTANY]
ARABIDOPSIS PROTEIN
BASIC LEUCINE ZIPPER TRANSCRIPTION FACTOR
NUCLEAR PROTEIN
PHYA PROTEIN, ARABIDOPSIS
PHYB PROTEIN, ARABIDOPSIS
PHYTOCHROME A
PHYTOCHROME B
PKS4 PROTEIN, ARABIDOPSIS
PROTEIN SERINE THREONINE KINASE
REPRESSOR PROTEIN
CIRCADIAN RHYTHM
GENE EXPRESSION PROFILING
GENE EXPRESSION REGULATION
GENETICS
GROWTH, DEVELOPMENT AND AGING
METABOLISM
MOLECULAR CLONING
PHOTOPERIODICITY
PLANT GENE
PLANT GROWTH
PLANT STEM
RADIATION EXPOSURE
SUNLIGHT
BASIC-LEUCINE ZIPPER TRANSCRIPTION FACTORS
CIRCADIAN CLOCKS
CLONING, MOLECULAR
GENE EXPRESSION REGULATION, PLANT
GENES, PLANT
NUCLEAR PROTEINS
PHOTOPERIOD
PLANT STEMS
PROTEIN-SERINE-THREONINE KINASES
REPRESSOR PROTEINS
TIME FACTORS
ARABIDOPSIS THALIANA
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2011Sellaro.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 0 0 |a Repression of shade - avoidance reactions by sunfleck induction of HY5 expression in Arabidopsis 
520 |a The light environment provides signals that play a critical role in the control of stem growth in plants. The reduced irradiance and altered spectral composition of shade light promote stem growth compared with unfiltered sunlight. However, whereas most studies have used seedlings exposed to contrasting but constant light treatments, the natural light environment may exhibit strong fluctuations. As a result of gaps in the canopy, plants shaded by neighbours may experience sunflecks, i.e. brief periods of exposure to unfiltered sunlight. Here, we show that sunflecks are perceived by phytochromes A and B, and inhibit hypocotyl growth in Arabidopsis thaliana mainly if they occur during the final portion of the photoperiod. By using forward and reverse genetic approaches we found that ELONGATED HYPOCOTYL 5, LATE ELONGATED HYPOCOTYL, PHYTOCHROME KINASE SUBSTRATE 4 and auxin signalling are key players in this response. 
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773 |t The Plant Journal  |g Vol.68, no.5 (2011), p.919-928 
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