English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/10611
Compartir / Impacto:
Add this article to your Mendeley library MendeleyBASE
Citado 46 veces en Web of Knowledge®  |  Pub MebCentral Ver citas en PubMed Central  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar bibText (RIS)Exportar csv (RIS)

Mucilage production during the incompatible interaction between Orobanche crenata and Vicia sativa

Autor Pérez de Luque, Alejandro ; Lozano, María Dolores ; Cubero, José I. ; González-Melendi, Pablo ; Risueño, María Carmen ; Rubiales, Diego
Palabras clave Histology
Orobanche crenata
Parasitic plants
Vascular gel
Vicia sativa
Wilt diseases
Xylem mucilage
Fecha de publicación 10-feb-2006
EditorSociety for Experimental Biology and Medicine
Citación Journal of Experimental Botany 57(4):931-942(2006)
ResumenOrobanche spp. (broomrapes) are holoparasites lacking in chlorophyll and totally dependent on their host for their supply of nutrients. O. crenata is a severe constraint to legumes cultivation and breeding for resistance remains as one of the best available methods of control. However, little is known about the basis of host resistance to broomrapes. It is a multicomponent event, and resistance based on hampering development and necrosis of broomrape tubercles has been reported. In the present work, the formation of mucilage and occlusion of host xylem vessels associated with the death of O. crenata tubercles were studied histologically. Samples of necrotic O. crenata tubercles established on resistant and susceptible vetch genotypes were collected. The samples were fixed, sectioned and stained using different procedures. The sections were observed at the light microscopy level, either under bright field, epi-fluorescence or confocal laser scanning microscopy. A higher proportion of necrotic tubercles was found on the resistant genotype and this was associated with a higher percentage of occluded vessels. Mucilage is composed mainly by carbohydrates (non-esterified pectins) and the presence of polyphenols was also detected. The mucilage and other substances composed by parasite secretions and host-degraded products was found to block host vessels and obstruct the parasite supply channel, being a quantitative defensive response against O. crenata in vetch, and probably also in other legumes and plants. The presence of foreign substances (i.e. parasite secretions) and host-degraded products (i.e. carbohydrates from cell walls) inside host vessels seems to activate this response and leads to xylem occlusion and further death of established Orobanche tubercles.
Descripción 12 pages, 7 figures.-- PMID: 16473889 [PubMed].
Versión del editorhttp://dx.doi.org/10.1093/jxb/erj078
URI http://hdl.handle.net/10261/10611
ISSN0022-0957 (Print)
1460-2431 (Online)
Aparece en las colecciones: (CIB) Artículos
(IAS) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
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.