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Artículo

Pharmacological and genetical evidence supporting nitric oxide requirement for 2,4-epibrassinolide regulation of root architecture in Arabidopsis thaliana

Tossi, Vanesa EleonoraIcon ; Lamattina, LorenzoIcon ; Cassia, Raul OscarIcon
Fecha de publicación: 07/2013
Editorial: Taylor & Francis
Revista: Plant Signaling & Behavior
ISSN: 1559-2316
e-ISSN: 1559-2324
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Biología del Desarrollo

Resumen

Brassinosteroids (BRs) regulate various physiological processes, such as tolerance to stresses and root growth. Recently, a connection was reported between BRs and nitric oxide (NO ) in plant responses to abiotic stress. Here we present evidence supporting NO functions in BR signaling during root growth process. Arabidopsis seedlings treated with BR 24-epibrassinolide (BL) show increased lateral roots (LR) density, inhibition of primary root (PR) elongation and NO accumulation. Similar effects were observed adding the NO donor GSNO to BR-receptor mutant bri1-1. Furthermore, BL induced responses in the root were abolished by the specific NO scavenger c-PTIO . The activities of nitrate reductase (NR )and nitric oxide synthase (NOS)-like, two NO generating enzymes were involved in BR signaling. These results demonstrate that BR increases the NO concentration in root cells, which is required for BR-induced changes in root architecture.
Palabras clave: Arabidopsis , Brassinosteroids , Nitric Oxide , Root Morphology
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/13047
URL: http://www.tandfonline.com/doi/abs/10.4161/psb.24712
DOI: http://dx.doi.org/10.4161/psb.24712
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Articulos(IIB)
Articulos de INSTITUTO DE INVESTIGACIONES BIOLOGICAS
Citación
Tossi, Vanesa Eleonora; Lamattina, Lorenzo; Cassia, Raul Oscar; Pharmacological and genetical evidence supporting nitric oxide requirement for 2,4-epibrassinolide regulation of root architecture in Arabidopsis thaliana; Taylor & Francis; Plant Signaling & Behavior; 8; 7; 7-2013; 247121-247124
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