Rewiring of auxin signaling under persistent shade

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Light cues from neighboring vegetation rapidly initiate plant shade - avoidance responses. Despite our detailed knowledge of the early steps of this response, the molecular events under prolonged shade are largely unclear. Here we show that persistent neighbor cues reinforce growth responses in addi...

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Detalles Bibliográficos
Otros Autores: Pucciariello, Ornella, Legris, Martina, Costigliolo Rojas, Cecilia, Iglesias, María José, Hernando, Carlos Esteban, Dezar, Carlos, Vazquez, Martín P., Casal, Jorge José
Formato: Artículo
Lenguaje:Inglés
Materias:
MIR393
PHYTOCHROME BPIF4
AUXINAUXIN
RECEPTOR AUXIN
AUXIN RESPONSE FACTOR 6
PHYTOCHROME B
PHYTOCHROME INTERACTING FACTOR 4
RECEPTOR
TRANSCRIPTION FACTOR
UNCLASSIFIED DRUG
ARABIDOPSIS PROTEIN
INDOLEACETIC ACID DERIVATIVE
PHYTOHORMONE
Acceso en línea:http://ri.agro.uba.ar/files/download/articulo/2018pucciariello.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 0 |a Rewiring of auxin signaling under persistent shade 
520 |a Light cues from neighboring vegetation rapidly initiate plant shade - avoidance responses. Despite our detailed knowledge of the early steps of this response, the molecular events under prolonged shade are largely unclear. Here we show that persistent neighbor cues reinforce growth responses in addition to promoting auxin - responsive gene expression in Arabidopsis and soybean. However, while the elevation of auxin levels is well established as an early event, in Arabidopsis, the response to prolonged shade occurs when auxin levels have declined to the prestimulation values. Remarkably, the sustained low activity of phytochrome B under prolonged shade led to (i) decreased levels of PHYTOCHROME INTERACTING FACTOR 4 (PIF4) in the cotyledons (the organs that supply auxin) along with increased levels in the vascular tissues of the stem, (ii) elevated expression of the PIF4 targets INDOLE-3-ACETIC ACID 19 (IAA19) and IAA29, which in turn reduced the expression of the growth-repressive IAA17 regulator, (iii) reduced abundance of AUXIN RESPONSE FACTOR 6, (iv) reduced expression of MIR393 and increased abundance of its targets, the auxin receptors, and (v) elevated auxin signaling as indicated by molecular markers. Mathematical and genetic analyses support the physiological role of this system - level rearrangement. We propose that prolonged shade rewires the connectivity between light and auxin signaling to sustain shade avoidance without enhanced auxin levels. 
650 |2 Agrovoc  |9 26 
653 |a MIR393 
653 |a PHYTOCHROME BPIF4 
653 |a AUXINAUXIN 
653 |a RECEPTOR AUXIN 
653 |a AUXIN RESPONSE FACTOR 6 
653 |a PHYTOCHROME B 
653 |a PHYTOCHROME INTERACTING FACTOR 4 
653 |a RECEPTOR 
653 |a TRANSCRIPTION FACTOR 
653 |a UNCLASSIFIED DRUG 
653 |a ARABIDOPSIS PROTEIN 
653 |a INDOLEACETIC ACID DERIVATIVE 
653 |a PHYTOHORMONE 
700 1 |a Pucciariello, Ornella  |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 68280 
700 1 |a Legris, Martina  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 67326 
700 1 |9 67610  |a Costigliolo Rojas, Cecilia  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina. 
700 1 |a Iglesias, María José  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 68528 
700 1 |9 68586  |a Hernando, Carlos Esteban  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina. 
700 1 |a Dezar, Carlos  |u Instituto de Agrobiotecnología de Rosario. Rosario, Argentina.  |9 68587 
700 1 |a Vazquez, Martín P.  |u Instituto de Agrobiotecnología de Rosario. Rosario, Argentina.  |9 68588 
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. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina. 
773 0 |t Proceedings of the National Academy of Sciences of the United States of America  |a National Academy of Sciences of the United States of America  |g vol.115, no.21 (2018), p.5612-5617, grafs., tbls., fot.  |w SECS001236 
856 |f 2018pucciariello  |u http://ri.agro.uba.ar/files/download/articulo/2018pucciariello.pdf  |i En internet  |q application/pdf  |x ARTI201904 
856 |u http://www.pnas.org  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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