English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/55570

Arabinogalactan-protein secretion is associated with the acquisition of stigmatic receptivity in the apple flower

AutorLosada Rodríguez, Juan Manuel ; Herrero Romero, María
Palabras claveAGPs
arabinogalactan proteins
Malus × domestica
pollen tube
stigmatic receptivity
flower receptivity
Fecha de publicaciónago-2012
EditorOxford University Press
CitaciónLosada JM, Herrero M. Arabinogalactan-protein secretion is associated with the acquisition of stigmatic receptivity in the apple flower. Annals of Botany 110 (3): 573-584 (2012)
ResumenBackground and Aims Stigmatic receptivity plays a clear role in pollination dynamics; however, little is known about the factors that confer to a stigma the competence to be receptive for the germination of pollen grains. In this work, a developmental approach is used to evaluate the acquisition of stigmatic receptivity and its relationship with a possible change in arabinogalactan-proteins (AGPs). Methods Flowers of the domestic apple, Malus × domestica, were assessed for their capacity to support pollen germination at different developmental stages. Stigmas from these same stages were characterized morphologically and different AGP epitopes detected by immunocytochemistry. Key Results Acquisition of stigmatic receptivity and the secretion of classical AGPs from stigmatic cells occurred concurrently and following the same spatial distribution. While in unpollinated stigmas AGPs appeared unaltered, in cross-pollinated stigmas AGPs epitopes vanished as pollen tubes passed by. Conclusions The concurrent secretion of AGPs with the acquisition of stigmatic receptivity, together with the differential response in unpollinated and cross-pollinated pistils point out a role of AGPs in supporting pollen tube germination and strongly suggest that secretion of AGPs is associated with the acquisition of stigma receptivity.
Descripción34 Pags., 6 Figs. The definitive version is available at: http://aob.oxfordjournals.org/
Versión del editorhttp://dx.doi.org/10.1093/aob/mcs116
Aparece en las colecciones: (EEAD) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
LosadaJM_AnnBot_2012.pdf4,59 MBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

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