Function of B-Box proteins under shade
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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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15592316_v6_n1_p_Crocco |
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todo:paper_15592316_v6_n1_p_Crocco2023-10-03T16:26:13Z Function of B-Box proteins under shade Crocco, C.D. Holm, M. Botto, J.F. Yanovsky, M.J. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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 |
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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, C.D. Holm, M. Botto, J.F. Yanovsky, M.J. 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. |
| format |
JOUR |
| author |
Crocco, C.D. Holm, M. Botto, J.F. Yanovsky, M.J. |
| author_facet |
Crocco, C.D. Holm, M. Botto, J.F. Yanovsky, M.J. |
| author_sort |
Crocco, C.D. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_15592316_v6_n1_p_Crocco |
| work_keys_str_mv |
AT croccocd functionofbboxproteinsundershade AT holmm functionofbboxproteinsundershade AT bottojf functionofbboxproteinsundershade AT yanovskymj functionofbboxproteinsundershade |
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1807316438500769792 |