Auxin - oxylipin crosstalk in stress responses of plant roots

Pollmann, Stephan (2011). Auxin - oxylipin crosstalk in stress responses of plant roots. En: "XXXIV Congreso de la Sociedad Española de Bioquímica y Biología Molecular (SEBBM)", 05/09/2011 - 08/09/2011, Barcelona, España.

Descripción

Título: Auxin - oxylipin crosstalk in stress responses of plant roots
Autor/es:
  • Pollmann, Stephan
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: XXXIV Congreso de la Sociedad Española de Bioquímica y Biología Molecular (SEBBM)
Fechas del Evento: 05/09/2011 - 08/09/2011
Lugar del Evento: Barcelona, España
Título del Libro: Actas del XXXIV Congreso de la Sociedad Española de Bioquímica y Biología Molecular (SEBBM)
Fecha: 2011
Materias:
Escuela: Otros Centros UPM
Departamento: Biotecnologia [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Phytohormones regulate a wide array of developmental processes throughout the life cycle of plants. Over recent years, mounting evidence led to the widely accepted concept that plant hormone action is not the read-out of linear pathways, but determined by the extensive combinatorial activity of the signaling molecules and the integration of their signaling pathways, both in terms of regulating growth and development and in adapting to external stimuli. Recent work is beginning to shed light on the crosstalk of both nominally synergistically and antagonistically acting plant hormones such as, for example, auxins with oxylipins. Here, we report that oxylipins directly contribute to the regulation of the expression of two Arabidopsis YUCCA (YUC) genes, YUC8 and YUC9. Similar to previously characterized YUC family members, we identify both YUC8 and YUC9 as involved in local auxin biosynthesis, as demonstrated by the altered auxin contents and auxin-dependent phenotypes displayed by loss-of function mutants and transgenic overexpressing lines. Gene expression data obtained by qPCR analysis and microscopic examination of promoter-reporter lines reveal an oxylipin-mediated regulation of YUC9 expression that is dependent on the COI1 signal transduction pathway. The microscopic data indicate a functional overlap of the two analyzed auxin biosynthesis genes, but also point out specific functions for YUC8 and YUC9, which are in part related to different spatio-temporal expression pattern. In support of these findings, the analyzed yuc knockout mutants had lower free auxin contents and displayed a reduced response to oxylipins. This work provides evidence of a molecular mechanism that links oxylipin signaling with auxin homeostasis.

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ID de Registro: 13173
Identificador DC: http://oa.upm.es/13173/
Identificador OAI: oai:oa.upm.es:13173
Depositado por: Memoria Investigacion
Depositado el: 30 Oct 2012 10:47
Ultima Modificación: 21 Abr 2016 12:29
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