Abstract
Programmed cell death (PCD) involves precise integration of cellular responses to extracellular and intracellular signals during both stress and development. In recent years much progress in our understanding of the components involved in PCD in plants has been made. Signalling to PCD results in major reorganisation of cellular components. The plant cytoskeleton is known to play a major role in cellular organisation, and reorganization and alterations in its dynamics is a well known consequence of signalling. There are considerable data that the plant cytoskeleton is reorganised in response to PCD, with remodelling of both microtubules and microfilaments taking place. In the majority of cases, the microtubule network depolymerises, whereas remodelling of microfilaments can follow two scenarios, either being depolymerised and then forming stable foci, or forming distinct bundles and then depolymerising. Evidence is accumulating that demonstrate that these cytoskeletal alterations are not just a consequence of signals mediating PCD, but that they also may have an active role in the initiation and regulation of PCD. Here we review key data from higher plant model systems on the roles of the actin filaments and microtubules during PCD and discuss proteins potentially implicated in regulating these alterations.
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Abbreviations
- ABP:
-
actin-binding protein
- ADF:
-
actin-depolymerising factor
- CAP:
-
cyclase-associated protein
- F-actin:
-
filamentous actin
- HR:
-
hypersensitive response
- MAP:
-
microtubule-associated protein
- PCD:
-
programmed cell death
- SI:
-
self-incompatibility
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Acknowledgements
Work in the lab of VE F-T. is funded by the Biotechnology and Biological Sciences Research Council (B.B.S.R.C.).
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Smertenko, A., Franklin-Tong, V. Organisation and regulation of the cytoskeleton in plant programmed cell death. Cell Death Differ 18, 1263–1270 (2011). https://doi.org/10.1038/cdd.2011.39
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DOI: https://doi.org/10.1038/cdd.2011.39
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