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FOTOMORFOGÉNESIS Desarrollo foto y escotomorfogénico Fotorreceptores
Fitocromos Criptocromos Fototropinas Transducción de señales por los fitocromos Ritmo circadiano COP9-signalosoma
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Plant development normally shows plasticity within certain bounds, that is, without falling into extreme phenotypes. The occurrence of multiple receptors and downstream signalling pathways, negative regulators, and positive and negative interactions provides the homeostasis that prevents exaggerated phenotypes under extreme environments. This system leaves room for change because the actual phenotype obtained within the range of normal developmental plasticity can depend on just a few receptors, negative regulators that establish the need for further environmental cues, and interactions that modulate the relationship between signal input and output.
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Convergencia de la información de los fotones
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De-etiolación de una plántula
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Plantulas creciendo en distintas condiciones de luz y análisis de la expresión génica correspondiente mediante microarrays.
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CONCEPTO DE FOTOMORFOGENESIS Y ESCOTOMORFOGENESIS
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fotorreceptores de plantas
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Dominios en el fitocromo
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Luz Roja Luz blanca Luz Infrarroja Luz Azul
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Mutantes de fitocromo en Arabidopsis
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the network that connects developmental genes to environmental
cues.
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Phytochrome photoperception and signal transduction in seedling photomorphogenesis.
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Light-induced nuclear translocation of phyA.
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PIF3
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PKS1 PKS1 interacts with phytochrome PKS1 expression
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Light-regulated PKS1 phosphorylation by phyA in vitro.
Seedlings overexpressing PKS1 have reduced sensitivity to white light.
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Direct targeting of light signals to primary photoresponse genes.
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Photons convey information.
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Cryptochrome and flowering time
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Phot1
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Phot1-2
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EL CONTROL DEL DESARROLLO FOTOMORFOGÉNICO
Sistema de control por degradación -EL COP9 signalosoma COP1 Componentes del sistema de identificación y degradación Papel del criptocromo cry1 Control del hy5
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La red que conecta los genes del desarrollo con las fluctuaciones ambientales
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Hy5
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The light regulation of HY5 is dependent on the nuclear abundance of
COP1 and its ability to interact with COP1.
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