The nitrate-afterripening crosstalk is involved in the testa rupture of sisymbryum offinales seed

Carrillo Barral, Nestor; Matilla, Angel J.; Iglesias Fernandez, Raquel; Lueiro, Begoña y Rodriguez Gacio, Maria del Carmen (2013). The nitrate-afterripening crosstalk is involved in the testa rupture of sisymbryum offinales seed. En: "XIII Congresso Luso - Espanhol de Fisiologia Vegetal", 24/07/2013 - 28/07/2013, Lisbon, Portugal. p. 158.

Descripción

Título: The nitrate-afterripening crosstalk is involved in the testa rupture of sisymbryum offinales seed
Autor/es:
  • Carrillo Barral, Nestor
  • Matilla, Angel J.
  • Iglesias Fernandez, Raquel
  • Lueiro, Begoña
  • Rodriguez Gacio, Maria del Carmen
Tipo de Documento: Ponencia en Congreso o Jornada (Póster)
Título del Evento: XIII Congresso Luso - Espanhol de Fisiologia Vegetal
Fechas del Evento: 24/07/2013 - 28/07/2013
Lugar del Evento: Lisbon, Portugal
Título del Libro: The nitrate-afterripening crosstalk is involved in the testa rupture of sisymbryum offinales seed
Fecha: 2013
Materias:
Escuela: Centro de Investigación en Biotecnología y Genómica de Plantas (CBGP) (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

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ID de Registro: 26467
Identificador DC: http://oa.upm.es/26467/
Identificador OAI: oai:oa.upm.es:26467
Depositado por: Memoria Investigacion
Depositado el: 05 May 2015 16:24
Ultima Modificación: 05 May 2015 16:24
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