Auxin - oxylipin crosstalk in stress responses of plant roots

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

Description

Title: Auxin - oxylipin crosstalk in stress responses of plant roots
Author/s:
  • Pollmann, Stephan
Item Type: Presentation at Congress or Conference (Article)
Event Title: XXXIV Congreso de la Sociedad Española de Bioquímica y Biología Molecular (SEBBM)
Event Dates: 05/09/2011 - 08/09/2011
Event Location: Barcelona, España
Title of Book: Actas del XXXIV Congreso de la Sociedad Española de Bioquímica y Biología Molecular (SEBBM)
Date: 2011
Subjects:
Faculty: Otros Centros UPM
Department: Biotecnologia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (4MB) | Preview

Abstract

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.

More information

Item ID: 13173
DC Identifier: http://oa.upm.es/13173/
OAI Identifier: oai:oa.upm.es:13173
Deposited by: Memoria Investigacion
Deposited on: 30 Oct 2012 10:47
Last Modified: 21 Apr 2016 12:29
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM