Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Flavonols Mediate Root Phototropism and Growth through Regulation of Proliferation-to-Differentiation Transition
Year:2016
Research Areas
  • Molecular, cellular and genetic biology
Information
Abstract
Roots normally grow in darkness, but they may be exposed to light. After perceiving light, roots bend to escape from light (root light avoidance) and reduce their growth. How root light avoidance responses are regulated is not well understood. Here, we show that illumination induces the accumulation of flavonols in Arabidopsis thaliana roots. During root illumination, flavonols rapidly accumulate at the side closer to light in the transition zone. This accumulation promotes asymmetrical cell elongation and causes differential growth between the two sides, leading to root bending. Furthermore, roots illuminated for a long period of time accumulate high levels of flavonols. This high flavonol content decreases both auxin signaling and PLETHORA gradient as well as superoxide radical content, resulting in reduction of cell proliferation. In addition, cytokinin and hydrogen peroxide, which promote root differentiation, induce flavonol accumulation in the root transition zone. As an outcome of prolonged light exposure and flavonol accumulation, root growth is reduced and a different root developmental zonation is established. Finally, we observed that these differentiation-related pathways are required for root light avoidance. We propose that flavonols function as positional signals, integrating hormonal and reactive oxygen species pathways to regulate root growth direction and rate in response to light.
International
Si
JCR
Si
Title
Plant Cell
ISBN
1040-4651
Impact factor JCR
9,338
Impact info
Datos JCR del año 2014
Volume
28
10.?1105/?tpc.?15.?00857
Journal number
6
From page
1372
To page
1387
Month
JUNIO
Ranking
Participants
  • Autor: Javier Silva Navas (UPM)
  • Autor: Miguel Angel Moreno Risueño (UPM)
  • Autor: Concepcion Manzano Fernandez (UPM)
  • Autor: Bárbara Téllez Robledo (UPM)
  • Autor: Sara Navarro Neila (UPM)
  • Autor: Stephan Pollmann (UPM)
  • Autor: Víctor Carrasco Loba (UPM)
  • Autor: F. Javier Gallego (Universidad Complutense de Madrid)
  • Autor: Juan Carlos Del Pozo Benito (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Biotecnología Vegetal
  • Grupo de Investigación: Redes Reguladoras del Desarrollo y Respuesta a Estrés en Plantas
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)