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Título

Protein cross-linking, peroxidase and b-1,3-endoglucanase involved in resistance of pea against Orobanche crenata

AutorPérez de Luque, Alejandro ; González-Verdejo, Clara Isabel; Lozano, María Dolores ; Dita, Miguel A.; Cubero, José I. ; González-Melendi, Pablo ; Risueño, María Carmen ; Rubiales, Diego
Palabras claveConfocal microscopy
cytochemistry
glucanase
in situ hybridization
Orobanche crenata
parasitic plants
peroxidase
Pisum sativum
protein cross-linking
resistance
Fecha de publicaciónmar-2006
EditorOxford University Press
CitaciónJournal of Experimental Botany 57(6):1461–1469(2006)
ResumenRoot holoparasitic angiosperms, like Orobanche spp, completely lack chlorophyll and totally depend on their host for their supply of nutrients. O. crenata is a severe constraint to the cultivation of legumes and breeding for resistance remains the most economical, feasible, and environmentally friendly method of control. Due to the lack of resistance in commercial pea cultivars, the use of wild relatives for breeding is necessary, and an understanding of the mechanisms underlying host resistance is needed in order to improve screening for resistance in breeding programmes. Compatible and incompatible interactions between O. crenata and pea have been studied using cytochemical procedures. The parasite was stopped in the host cortex before reaching the central cylinder, and accumulation of H2O2, peroxidases, and callose were detected in neighbouring cells. Protein cross-linking in the host cell walls appears as the mechanism of defence, halting penetration of the parasite. In situ hybridization studies have also shown that a peroxidase and a β-glucanase are differently expressed in cells of the resistant host (Pf651) near the penetration point. The role of these proteins in the resistance to O. crenata is discussed
Descripción9 páginas, 5 figuras -- PAGS nros. 1461-1469
Versión del editorhttps://dx.doi.org/10.1093/jxb/erj127
URIhttp://hdl.handle.net/10261/65274
DOI10.1093/jxb/erj127
ISSN0022-0957
E-ISSN1460-2431 57
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