The timing of low R:FR exposure profoundly affects Arabidopsis branching responses

The ratio of Red to Far Red light [R:FR] is sensed by phytochromes, including phytochrome B, and serves as a signal of potential competition. Low R:FR represses Arabidopsis thaliana branching by promoting the accumulation of abscisic acid in the young buds and by enhancing auxin signaling in the mai...

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Otros Autores: Reddy, Srirama Krishna, Holalu, Srinidhi V., Casal, Jorge José, Finlayson, Scott A.
Formato: Artículo
Lenguaje:Español
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Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2014reddy.pdf
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Aporte de:Registro referencial: Solicitar el recurso aquí
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245 1 0 |a The timing of low R:FR exposure profoundly affects Arabidopsis branching responses 
520 |a The ratio of Red to Far Red light [R:FR] is sensed by phytochromes, including phytochrome B, and serves as a signal of potential competition. Low R:FR represses Arabidopsis thaliana branching by promoting the accumulation of abscisic acid in the young buds and by enhancing auxin signaling in the main shoot. While overall plant level branching is reduced by low R:FR, the growth of the uppermost branches tends to be promoted while the lower buds are suppressed. Buds at intermediate positions can show either growth promotion or growth suppression by low R:FR if they become exposed to low R:FR late or early, respectively. This pattern suggests that developmental stage specific programming occurs to modify the response of specific buds to branching regulators including auxin and ABA. 
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653 0 |a ARABIDOPSIS 
653 0 |a AUXIN 
653 0 |a BRANCHING 
653 0 |a BUD 
653 0 |a PHYTOCHROME 
653 0 |a RED LIGHT: FAR RED LIGHT 
700 1 |a Reddy, Srirama Krishna  |9 71644 
700 1 |a Holalu, Srinidhi V.  |9 71645 
700 1 |9 792  |a Casal, Jorge José 
700 1 |a Finlayson, Scott A.  |9 70211 
773 |t Plant Signaling and Behavior  |g vol.9 (2014) e28668, 3 p. 
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