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Ponencias en congresos:
THE NITRATE-AFTERRIPENING CROSSTALK IS INVOLVED IN THE TESTA RUPTURE OF SISYMBRYUM OFFICINALE SEEDS (póster)
Año:2013
Áreas de investigación
  • Biología molecular,
  • Investigación agronómica
Datos
Descripción
The loss of seed dormancy can occur by exposing the seed at low moisture storage conditions (afterripening; AR). Since a positive GA:ABA ratio play a key role in the reactivation of germination of non-dormant seeds, it seems obvious that a remarkable effect of AR is the decreasing of both ABA levels and sensitivity, as well as the increment of GA synthesis and sensitivity. ABA levels are regulated by control both of its biosynthesis thorough the 9-cis-epoxycarotenoid dioxygenase (NCED) encoding genes and its catabolism mediated mainly by ABA-8¿-hydroxylases (CYP707A). On the other hand, the last steps of the GA biosynthesis pathway should be involved to control its levels. Namely, GA20ox and GA3ox catalyzing the biosynthesis of active GA and GA2ox which catalyzes the GA inactivation. The presence of nitrate accelerates the sensu stricto germination of non-AR S. officinale seeds. Here, we demonstrate that in AR seeds nitrate also alters the expression pattern of key genes involved in ABA and GA metabolism and signalling (i.e. SoNCED6, SoNCED9, SoCYP707A2, SoABI5, SoGA3ox2, SoGA20ox6, SoGA2ox6 and SoRGL2). These results suggest that the nitrate signalling is also operative during imbibition of AR S. officinale seeds.
Internacional
Si
Nombre congreso
XIII Congresso Luso-Espanhol de Fisiologia Vegetal
Tipo de participación
960
Lugar del congreso
Lisboa (Portugal)
Revisores
Si
ISBN o ISSN
0000-0000
DOI
Fecha inicio congreso
24/07/2013
Fecha fin congreso
28/07/2013
Desde la página
158
Hasta la página
158
Título de las actas
XIII Congresso Luso-Espanhol de Fisiologia Vegetal
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Nestor Carrillo Barral (UPM)
  • Autor: Ángel Jesús Matilla (Universidad de Santiago de Compostela)
  • Autor: Raquel Iglesias Fernandez (UPM)
  • Autor: Begoña Lueiro (Universidad de Santiago de Compostela)
  • Autor: M. Carmen Rodríguez Gacio (Universidad de Santiago de Compostela)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Biotecnología y Genómica de Semillas
  • Centro o Instituto I+D+i: Centro de Biotecnología y Genómica de Plantas, CBGP
  • Departamento: Biotecnología
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