Function of B-Box proteins under shade

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Plants are capable of perceiving changes in the light environment and finely adjust their growth and development. Reductions of red to far-red ratio (R:FR) generated by an increase of the plant canopy above the plant are sensed by the phytochrome system triggering the shade-avoidance syndrome (SAS)...

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Autores principales: Crocco, Carlos Daniel, Botto, Javier Francisco, Yanovsky, Marcelo Javier
Publicado: 2011
Materias:
B-box-containing proteins (BBX)
Canopy shade
COP1
Shade-avoidance syndrome (SAS)
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15592316_v6_n1_p_Crocco
http://hdl.handle.net/20.500.12110/paper_15592316_v6_n1_p_Crocco
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_15592316_v6_n1_p_Crocco
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spelling paper:paper_15592316_v6_n1_p_Crocco2023-06-08T16:23:45Z Function of B-Box proteins under shade Crocco, Carlos Daniel Botto, Javier Francisco Yanovsky, Marcelo Javier B-box-containing proteins (BBX) Canopy shade COP1 Shade-avoidance syndrome (SAS) Plants are capable of perceiving changes in the light environment and finely adjust their growth and development. Reductions of red to far-red ratio (R:FR) generated by an increase of the plant canopy above the plant are sensed by the phytochrome system triggering the shade-avoidance syndrome (SAS) that includes elongation of vegetative structures, reduction of branching and acceleration of flowering. Albeit the SAS is a strategy of major adaptative significance in plant communities, involving if massive changes in gene expression, our knowledge of the SAS signaling network is still fragmented. By a selection and characterization of a T-DNA mutant with a long hypocotyl under shade, we identified BBX21, a protein with two B-box domains, that is involved in the SAS. BBX21 belongs to a small eight member family of B-box-containing proteins with both opposite and additive functions in the SAS signaling. BBX21 downregulates the gene expression of auxin, brassinosteroid and ethylene signaling pathway components under shade. Furthermore BBX21 is a transcription factor that interacts genetically with COP1. We propose a model in which a dynamic balance of positive and negative B-box transcriptional regulators acts as a gas-and-brake mechanism into the COP1 signaling to regulate the expression of SAS. © 2011 Landes Bioscience. Fil:Crocco, C.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Botto, J.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Yanovsky, M.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15592316_v6_n1_p_Crocco http://hdl.handle.net/20.500.12110/paper_15592316_v6_n1_p_Crocco
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic B-box-containing proteins (BBX)
Canopy shade
COP1
Shade-avoidance syndrome (SAS)
spellingShingle B-box-containing proteins (BBX)
Canopy shade
COP1
Shade-avoidance syndrome (SAS)
Crocco, Carlos Daniel
Botto, Javier Francisco
Yanovsky, Marcelo Javier
Function of B-Box proteins under shade
topic_facet B-box-containing proteins (BBX)
Canopy shade
COP1
Shade-avoidance syndrome (SAS)
description Plants are capable of perceiving changes in the light environment and finely adjust their growth and development. Reductions of red to far-red ratio (R:FR) generated by an increase of the plant canopy above the plant are sensed by the phytochrome system triggering the shade-avoidance syndrome (SAS) that includes elongation of vegetative structures, reduction of branching and acceleration of flowering. Albeit the SAS is a strategy of major adaptative significance in plant communities, involving if massive changes in gene expression, our knowledge of the SAS signaling network is still fragmented. By a selection and characterization of a T-DNA mutant with a long hypocotyl under shade, we identified BBX21, a protein with two B-box domains, that is involved in the SAS. BBX21 belongs to a small eight member family of B-box-containing proteins with both opposite and additive functions in the SAS signaling. BBX21 downregulates the gene expression of auxin, brassinosteroid and ethylene signaling pathway components under shade. Furthermore BBX21 is a transcription factor that interacts genetically with COP1. We propose a model in which a dynamic balance of positive and negative B-box transcriptional regulators acts as a gas-and-brake mechanism into the COP1 signaling to regulate the expression of SAS. © 2011 Landes Bioscience.
author Crocco, Carlos Daniel
Botto, Javier Francisco
Yanovsky, Marcelo Javier
author_facet Crocco, Carlos Daniel
Botto, Javier Francisco
Yanovsky, Marcelo Javier
author_sort Crocco, Carlos Daniel
title Function of B-Box proteins under shade
title_short Function of B-Box proteins under shade
title_full Function of B-Box proteins under shade
title_fullStr Function of B-Box proteins under shade
title_full_unstemmed Function of B-Box proteins under shade
title_sort function of b-box proteins under shade
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15592316_v6_n1_p_Crocco
http://hdl.handle.net/20.500.12110/paper_15592316_v6_n1_p_Crocco
work_keys_str_mv AT croccocarlosdaniel functionofbboxproteinsundershade
AT bottojavierfrancisco functionofbboxproteinsundershade
AT yanovskymarcelojavier functionofbboxproteinsundershade
_version_ 1768545757184393216

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