title: Role of peroxynitrite in programmed cell death induced in self-incompatible pollen.
abstract: Reactive oxygen species and NO are involved in the signaling pathway of programmed cell death (PCD). Information concerning the role of these molecules in self-incompatible pollination is scarce especially in non-model species studied in vivo. We recently reported that in the olive tree, compatible and self-incompatible pollen have different levels of reactive oxygen and nitrogen species and that PCD is induced in self-incompatible pollen. Levels of O 2 (.-)  and NO are higher in pollen after self-incompatible pollination than after compatible pollination. The presence of these reactive species was concomitant with the presence of peroxynitrite. Similar results were obtained on pollen-germination experiments both in vivo and in vitro. These data, together with observations made after treating pollinated flowers with scavengers, suggest that peroxynitrite plays a role in PCD induced after self-incompatible pollination and we propose here a model to describe the way in which it might work.
authors: Departamento de Bioquímica, Biología Celular y Molecular de Plantas, Estación Experimental del Zaidín, CSIC, Granada, Spain. iserrano@indiana.edu
authors: Irene
authors: I
authors: Serrano
authors: María C
authors: MC
authors: Romero-Puertas
authors: María
authors: M
authors: Rodríguez Serrano
authors: Luisa M
authors: LM
authors: Sandalio
authors: Adela
authors: A
authors: Olmedilla
mesh_terms: D017209:Apoptosis; D008954:Models, Biological; D009569:Nitric Oxide / Q000378:metabolism; D031658:Olea / Q000166:cytology* / Q000502:physiology*; D030421:Peroxynitrous Acid / Q000378:metabolism*; D011058:Pollen / Q000166:cytology* / Q000502:physiology*; D060436:Self-Incompatibility in Flowering Plants / Q000502:physiology*
chemical_list: D030421:Peroxynitrous Acid; D009569:Nitric Oxide