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

Silva, Javier; Moreno Risueño, Miguel Ángel; Manzano, Concepción; Téllez Robledo, Bárbara; Navarro Neila, Sara; Carrasco Loba, Víctor; Pollmann, Stephan; Gallego, Javier y 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.

Descripción

Título: Flavonols Mediate Root Phototropism and Growth through Regulation of Proliferation-to-Differentiation Transition
Autor/es:
  • 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
Tipo de Documento: Artículo
Título de Revista/Publicación: Plant Cell
Fecha: Junio 2016
Volumen: 28
Materias:
Escuela: Centro de Investigación en Biotecnología y Genómica de Plantas (CBGP) (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
FP7PCIG11-GA-2012-322082NEW ROOT STEM CELLSUNIVERSIDAD POLITECNICA DE MADRIDA molecular, genomics and genetic analysis of new stem cell formation during root morphogenesis
Gobierno de EspañaBFU2013-41160-PSin especificarSin especificarSin especificar

Más información

ID de Registro: 45952
Identificador DC: http://oa.upm.es/45952/
Identificador OAI: oai:oa.upm.es:45952
Identificador DOI: 10.1105/tpc.15.00857
URL Oficial: http://www.plantcell.org/content/28/6/1372
Depositado por: Memoria Investigacion
Depositado el: 27 Jul 2017 14:51
Ultima Modificación: 27 Jul 2017 14:51
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