Signalling to programmed cell death in self-incompatible pollen

Maurice Bosch, Barend H. J. de Graaf, N. Poulter, S. Vatovec, S. Li, V. E. Franklin-Tong

Research output: Contribution to conferencePaper


Many higher plants use self incompatibility (SI) to prevent self-fertilization. In Papaver rhoeas, the rejection of “self” pollen involves a Ca2+-dependent signalling network that triggers programmed cell death (PCD), providing a neat way to get rid of unwanted incompatible (“self”) pollen. Several SI-induced events have been identified, including: rapid depolymerization of the actin and microtubule cytoskeleton ([Snowman et al., 2002] and [Poulter et al., 2008]); phosphorylation of a soluble inorganic pyrophosphatase ([Rudd et al., 1996] and [de Graaf et al., 2006]); activation of a MAPK, p56 ([Rudd et al., 2003] and [Li et al., 2007]), and PCD, which involves several caspase-like activities, including a DEVDase, VEIDase and a LEVDase ([Bosch and Franklin-Tong, 2007] and [Thomas and Franklin-Tong, 2004]). PCD provides a precise mechanism for the specific destruction of “self” pollen. Our focus recently has been on beginning to attempt to understand how the signalling networks involved in SI-mediated PCD are integrated. I will present recent data providing evidence for actin, microtubules and MAPK signalling to activate caspase-like activities, resulting in PCD.
Original languageEnglish
Publication statusPublished - 01 Jul 2008
Event2008 Society of Experimental Biology Annual Main Meeting - Marseille, France
Duration: 06 Jul 200810 Jul 2008


Conference2008 Society of Experimental Biology Annual Main Meeting
Abbreviated title2008 SEB Annual Main Meeting
Period06 Jul 200810 Jul 2008


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