Flavonols Mediate Root Phototropism and Growth through Regulation of Proliferation-to-Differentiation Transition

Silva, Javier and Moreno Risueño, Miguel Ángel and Manzano, Concepción and Téllez Robledo, Bárbara and Navarro Neila, Sara and Carrasco Loba, Víctor and Pollmann, Stephan and Gallego, Javier and Pozo Benito, Juan Carlos del (2016). Flavonols Mediate Root Phototropism and Growth through Regulation of Proliferation-to-Differentiation Transition. "Plant Cell", v. 28 (n. 6); pp. 1372-1387. ISSN 1040-4651. https://doi.org/10.1105/tpc.15.00857.

Description

Title: Flavonols Mediate Root Phototropism and Growth through Regulation of Proliferation-to-Differentiation Transition
Author/s:
  • Silva, Javier
  • Moreno Risueño, Miguel Ángel
  • Manzano, Concepción
  • Téllez Robledo, Bárbara
  • Navarro Neila, Sara
  • Carrasco Loba, Víctor
  • Pollmann, Stephan
  • Gallego, Javier
  • Pozo Benito, Juan Carlos del
Item Type: Article
Título de Revista/Publicación: Plant Cell
Date: June 2016
ISSN: 1040-4651
Volume: 28
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

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.

Funding Projects

TypeCodeAcronymLeaderTitle
FP7322082NEW ROOT STEM CELLSUNIVERSIDAD POLITECNICA DE MADRIDA molecular, genomics and genetic analysis of new stem cell formation during root morphogenesis
Government of SpainBFU2013-41160-PUnspecifiedUnspecifiedIdentificación y caracterización de los determinantes moleculares de la pluripotencia adulta en plantas usando la raíz de arabidopsis
Government of SpainBIO2011-28184-C02-01UnspecifiedUnspecifiedConexión de las auxinas y el ciclo celular a través del complejo SCFSKP2. Desarrollo de las raíces laterales II
Government of SpainCSD-00057UnspecifiedUnspecifiedUnspecified
Government of SpainBIO2014-52091-RUnspecifiedUnspecifiedIdentificación de nuevos genes y productos bioactivos para la optimización de los recursos naturales dentro una agricultura sostenible

More information

Item ID: 45952
DC Identifier: http://oa.upm.es/45952/
OAI Identifier: oai:oa.upm.es:45952
DOI: 10.1105/tpc.15.00857
Official URL: http://www.plantcell.org/content/28/6/1372
Deposited by: Memoria Investigacion
Deposited on: 27 Jul 2017 14:51
Last Modified: 20 Mar 2019 15:35
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