English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/23999
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 14 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Alterations of the resin canal system of Pinus pinaster seedlings after fertilization of a healthy and of a Hylobius abietis attacked stand

AutorMoreira Tomé, Xoaquín; Sampedro Pérez, Luis; Zas Arregui, Rafael; Solla, Alejandro
Palabras claveHerbivory
Constitutive defence
Induced defence
Phloem
Xylem
Large pine weevil
Fecha de publicacióndic-2008
EditorSpringer
CitaciónTrees - Structure and Function, 22 (6): 771-777.
ResumenChanges in resource availability and biotic and abiotic stress may alter the defensive mechanisms of pine trees. The effect of fertilisation on the resin canal structure of Pinus pinaster seedlings established in two trials in NW Spain, one attacked by Hylobius abietis and the other non-attacked, was studied. The leaders of 50 plants were destructively sampled and the resin canal density, the canal area and its relative conductive area in the phloem and xylem were assessed. Experimentally increased nutrient availability significantly decreased resin canal density in the phloem of the seedlings in the two analysed trials, where unfertilised seedlings presented up to 30% more resin canal density than the fertilised seedlings (mean value ± SEM = 0.32 ± 0.02 resin canals mm−2 in the fertilised plants versus 0.45 ± 0.04 resin canals mm−2 in the control plants). Fertilisation had no effect on the resin canal system in the xylem, but significantly increased tracheid size. Significant differences of resin canals among sites were observed mainly in the xylem; the resin canal density was 1.7-fold greater in the attacked site than in the non-attacked site. The similar structure of phloem resin canals in both sites supports that phloem resin canals are constitutive mechanisms of defence in P. pinaster, whereas xylem resin canals would be constitutive mechanisms but also inducible mechanisms of resistance following the attack of pine weevils or bark beetles.
Versión del editorhttp://dx.doi.org/10.1007/s00468-008-0237-4
URIhttp://hdl.handle.net/10261/23999
DOI10.1007/s00468-008-0237-4
ISSN0931-1890
Aparece en las colecciones: (MBG) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Alterations of the resin canal system of Pinus pinaster seedlings.pdf153 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.