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

Silva, Javier, Moreno Risueño, Miguel Ángel ORCID: https://orcid.org/0000-0002-9794-1450, Manzano, Concepción, Téllez Robledo, Bárbara, Navarro Neila, Sara ORCID: https://orcid.org/0000-0002-9335-5665, Carrasco Loba, Víctor, Pollmann, Stephan ORCID: https://orcid.org/0000-0002-5111-4425, 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:
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

Type
Code
Acronym
Leader
Title
FP7
322082
NEW ROOT STEM CELLS
UNIVERSIDAD POLITECNICA DE MADRID
A molecular, genomics and genetic analysis of new stem cell formation during root morphogenesis
Government of Spain
BFU2013-41160-P
Unspecified
Unspecified
Identificación y caracterización de los determinantes moleculares de la pluripotencia adulta en plantas usando la raíz de arabidopsis
Government of Spain
BIO2011-28184-C02-01
Unspecified
Unspecified
Conexión de las auxinas y el ciclo celular a través del complejo SCFSKP2. Desarrollo de las raíces laterales II
Government of Spain
CSD-00057
Unspecified
Unspecified
Unspecified
Government of Spain
BIO2014-52091-R
Unspecified
Unspecified
Identificación de nuevos genes y productos bioactivos para la optimización de los recursos naturales dentro una agricultura sostenible

More information

Item ID: 45952
DC Identifier: https://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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