Shade delays flowering in Medicago sativa

Shade-intolerant plants respond to the decrease in the red (R) to far-red (FR) light ratio (R:FR) occurring under shade by elongating stems and petioles and by re-positioning leaves, in a race to outcompete neighbors for the sunlight resource. In some annual species, the shade avoidance syndrome (SA...

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Detalles Bibliográficos
Otros Autores: Lorenzo, Christian D., Iserte, Javier Alonso, Sanchez Lamas, Maximiliano, Antonietti, Mariana Sofia, Garcia Gagliardi, Pedro, Hernando, Carlos Esteban, Vazquez, Martin, Casal, Jorge José
Formato: Artículo
Lenguaje:Inglés
Materias:
ARABIDOPSIS THALIANA HOMEOBOX 2 (ATHB2)
FLOWERING
MEDICAGO SATIVA (ALFALFA)
PHYTOCHROME INTERACTING FACTOR 3 (PIF3)
SHADE-AVOIDANCE RESPONSE
SQUAMOSA PROMOTER BINDING PROTEIN LIKE 3 (SPL3)
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2019lorenzo.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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024 |a 10.1111/tpj.14333 
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245 1 0 |a Shade delays flowering in Medicago sativa 
520 |a Shade-intolerant plants respond to the decrease in the red (R) to far-red (FR) light ratio (R:FR) occurring under shade by elongating stems and petioles and by re-positioning leaves, in a race to outcompete neighbors for the sunlight resource. In some annual species, the shade avoidance syndrome (SAS) is accompanied by the early induction of flowering. Anticipated flowering is viewed as a strategy to set seeds before the resources become severely limiting. Little is known about the molecular mechanisms of SAS in perennial forage crops like alfalfa (Medicago sativa). To study SAS in alfalfa, we exposed alfalfa plants to simulated shade by supplementing with FR light. Low R:FR light produced a classical SAS, with increased internode and petiole lengths, but unexpectedly also with delayed flowering. To understand the molecular mechanisms involved in uncoupling SAS from early flowering, we used a transcriptomic approach. The SAS is likely to be mediated by increased expression of msPIF3 and msHB2 in low R:FR light. Constitutive expression of these genes in Arabidopsis led to SAS, including early flowering, strongly suggesting that their roles are conserved. Delayed flowering was likely to be mediated by the downregulation of msSPL3, which promotes flowering in both Arabidopsis and alfalfa. Shade-delayed flowering in alfalfa may be important to extend the vegetative phase under suboptimal light conditions, and thus assure the accumulation of reserves necessary to resume growth after the next season. 
650 |2 Agrovoc  |9 26 
653 |a ARABIDOPSIS THALIANA HOMEOBOX 2 (ATHB2) 
653 |a FLOWERING 
653 |a MEDICAGO SATIVA (ALFALFA) 
653 |a PHYTOCHROME INTERACTING FACTOR 3 (PIF3) 
653 |a SHADE-AVOIDANCE RESPONSE 
653 |a SQUAMOSA PROMOTER BINDING PROTEIN LIKE 3 (SPL3) 
700 1 |a Lorenzo, Christian D.  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 69087 
700 1 |a Iserte, Javier Alonso  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 69088 
700 1 |a Sanchez Lamas, Maximiliano  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 69089 
700 1 |a Antonietti, Mariana Sofia  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 69090 
700 1 |a Garcia Gagliardi, Pedro  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 69091 
700 1 |a Hernando, Carlos Esteban  |u CONICET. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. Buenos Aires, Argentina.  |9 68586 
700 1 |a Vazquez, Martin  |u CONICET. Instituto de Agrobiotecnología de Rosario (INDEAR). Rosario, Argentina.  |u CONICET. Santa Fe, Argentina.  |9 69092 
700 1 |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.  |9 792 
773 |t The Plant Journal  |g vol.99, no.1 (2019), p.7-22, tbls., grafs., fot. 
856 |f 2019lorenzo  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2019lorenzo.pdf  |x ARTI201908 
856 |z LINK AL EDITOR  |u https://www.wiley.com 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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