English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/125620
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Nitric oxide induces the alternative oxidase pathway under phosphate deficiency

AutorRoyo, Beatriz ; Morán, José F. ; Ratcliffe, George; Gupta, Kapuganti J.
Fecha de publicación22-jun-2014
CitaciónPlant Biology Europe Congress (2014)
ResumenNitric oxide (NO) is a signal molecule that plays an important role in plant growth, development and stress physiology. In recent years the biosynthesis and action of NO in plant mitochondria has gained increasing attention. The plant mitochondrial electron transport has two pathways for the reduction of oxygen: the cytochrome pathway and the alternative oxidase (AOX) pathway. Both pathways are involved in mitochondrial NO metabolism, and the AOX pathway protects plants against the production of deleterious quantities of reactive oxygen species (ROS). We studied the cytochrome and alternative pathways in Arabidopsis thaliana subjected to phosphate deficiency. WT (cv. Columbia) and nia1,2 (nitrate reductase deficient mutant) seedlings were grown in axenic cultures that contained either 1 mM (+P) or 0 mM (-P) inorganic phosphate. Phosphate starvation increased production of NO in WT, leading to increased capacity in the AOX pathway and decreased superoxide levels. In contrast, the nia1,2 mutant failed to induce NO under phosphate starvation, leading to a lower AOX capacity and increased production of superoxide. As a result, the nia mutants had a lower biomass than WT plants under phosphate starvation. Furthermore the NO donor GSNO restored the nia1,2 phenotype under phosphate starvation, confirming the requirement for NO for stress resistance during phosphate starvation.
DescripciónPóster presentado en el Plant Biology Europe 2014 Congress (FESPB/EPSO) celebrado en Dublín (Irlanda), del 22 al 26 de junio de 2014
URIhttp://hdl.handle.net/10261/125620
Aparece en las colecciones: (IDAB) Comunicaciones congresos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.