Low blue light enhances phototropism by releasing cryptochrome1 - mediated Inhibition of PIF4 expression
Shade-avoiding plants, including Arabidopsis (Arabidopsis thaliana), display a number of growth responses, such as elongation of stem-like structures and repositioning of leaves, elicited by shade cues, including a reduction in the blue and red portions of the solar spectrum and a low-red to far-red...
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| Otros Autores: | , , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Materias: | |
| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2020boccaccini.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 001 | 20211112120531.0 | ||
| 003 | AR-BaUFA | ||
| 005 | 20221026112342.0 | ||
| 008 | 211112t2020 xxkdo|||o|||| 00| 0 eng d | ||
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| 022 | |a 0032-0889 | ||
| 024 | |a 10.1104/pp.20.00243 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 245 | 1 | 0 | |a Low blue light enhances phototropism by releasing cryptochrome1 - mediated Inhibition of PIF4 expression |
| 520 | |a Shade-avoiding plants, including Arabidopsis (Arabidopsis thaliana), display a number of growth responses, such as elongation of stem-like structures and repositioning of leaves, elicited by shade cues, including a reduction in the blue and red portions of the solar spectrum and a low-red to far-red ratio. Shade also promotes phototropism of de-etiolated seedlings through repression of phytochrome B, presumably to enhance capture of unfiltered sunlight. Here we show that both low blue light and a low-red to far-red light ratio are required to rapidly enhance phototropism in Arabidopsis seedlings. However, prolonged low blue light treatments are sufficient to promote phototropism through reduced cryptochrome1 (cry1) activation. The enhanced phototropic response of cry1 mutants in the lab and in response to natural canopies depends on CHYTOCHROME INTERACTING FACTORs (PIFs). In favorable light conditions, cry1 limits the expression of PIF4, while in low blue light, PIF4 expression increases, which contributes to phototropic enhancement. The analysis of quantitative DII-Venus, an auxin signaling reporter, indicates that low blue light leads to enhanced auxin signaling in the hypocotyl and, upon phototropic stimulation, a steeper auxin signaling gradient across the hypocotyl. We conclude that phototropic enhancement by canopy shade results from the combined activities of phytochrome B and cry1 that converge on PIF regulation. | ||
| 650 | |2 Agrovoc |9 26 | ||
| 653 | |a ARABIDOPSIS THALIANA | ||
| 653 | |a PHOTOTROPISM | ||
| 653 | |a SHADE | ||
| 700 | 1 | |a Boccaccini, Alessandra |u University of Lausanne. Faculty of Biology and Medicine. Centre for Integrative Genomics. Lausanne, Switzerland. |9 73120 | |
| 700 | 1 | |a Legris, Martina |u University of Lausanne. Faculty of Biology and Medicine. Centre for Integrative Genomics. Lausanne, Switzerland. |9 67326 | |
| 700 | 1 | |a Krahmer, Johanna |u University of Lausanne. Faculty of Biology and Medicine. Centre for Integrative Genomics. Lausanne, Switzerland. |9 73121 | |
| 700 | 1 | |a Allenbach Petrolati, Laure |u University of Lausanne. Faculty of Biology and Medicine. Centre for Integrative Genomics. Lausanne, Switzerland. |9 73122 | |
| 700 | 1 | |a Goyal, Anupama |u University of Lausanne. Faculty of Biology and Medicine. Centre for Integrative Genomics. Lausanne, Switzerland. |9 67480 | |
| 700 | 1 | |a Galvan Ampudia, Carlos S. |u Université Lyon. Laboratoire de Reproduction et Développement des Plantes. Lyon, France. |9 73123 | |
| 700 | 1 | |a Vernoux, Teva |u Université Lyon. Laboratoire de Reproduction et Développement des Plantes. Lyon, France. |9 73124 | |
| 700 | 1 | |a Karayekov, Elizabeth |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |9 67481 | |
| 700 | 1 | |9 792 |a Casal, Jorge José |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET. Instituto Leloir, Instituto de Investigaciones Bioquimicas de Buenos Aires. Buenos Aires, Argentina. | |
| 700 | 1 | |a Fankhauser, Christian |u University of Lausanne. Faculty of Biology and Medicine. Centre for Integrative Genomics. Lausanne, Switzerland. |9 67487 | |
| 773 | 0 | |t Plant physiology |g Vol.183, no.4 (2020), p.1780–1793, grafs., fot. |w (AR-BaUFA)SECS000156 | |
| 856 | |f 2020boccaccini |i En reservorio |q application/pdf |u http://ri.agro.uba.ar/files/intranet/articulo/2020boccaccini.pdf |x ARTI202111 | ||
| 856 | |u http://www.aspb.org |z LINK AL EDITOR | ||
| 942 | |c ARTICULO | ||
| 942 | |c ENLINEA | ||
| 976 | |a AAG | ||