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

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

Description

Title: The nitrate-afterripening crosstalk is involved in the testa rupture of sisymbryum offinales seed
Author/s:
  • Carrillo Barral, Nestor
  • Matilla, Angel J.
  • Iglesias Fernandez, Raquel
  • Lueiro, Begoña
  • Rodriguez Gacio, Maria del Carmen
Item Type: Presentation at Congress or Conference (Poster)
Event Title: XIII Congresso Luso - Espanhol de Fisiologia Vegetal
Event Dates: 24/07/2013 - 28/07/2013
Event Location: Lisbon, Portugal
Title of Book: The nitrate-afterripening crosstalk is involved in the testa rupture of sisymbryum offinales seed
Date: 2013
Subjects:
Faculty: Centro de Investigación en Biotecnología y Genómica de Plantas (CBGP) (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 26467
DC Identifier: http://oa.upm.es/26467/
OAI Identifier: oai:oa.upm.es:26467
Deposited by: Memoria Investigacion
Deposited on: 05 May 2015 16:24
Last Modified: 05 May 2015 16:24
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