The ER Within Plasmodesmata

Chapter
First Online:
Part of the Plant Cell Monographs book series (CELLMONO, volume 4)

Abstract

The endoplasmic reticulum (ER) is an essential component of plasmodesmata, the membrane-lined poresthat interconnect plant cells. The desmotubule which traverses the centre of a plasmodesma is formedfrom, and continuous with, the cortical ER. Whilst the exact role of the ER is only now being characterised,it is recognised that the ER is intimately involved in the transfer of molecules to and through plasmodesmata,providing a number of pathways for movement between cells as well as being implicated in the mechanismsthat control transport. It is believed that molecules may be transported by passive flow within the desmotubulelumen, by diffusion along the inner desmotubule membranes or by specific attachment to the cytoplasmic faceof the desmotubule followed by facilitated transport through the cytoplasmic sleeve. The ER is also involvedin the formation of plasmodesmata either during cell division or when formed de novo across non-divisionwalls. This chapter focusses on the role of the ER in plasmodesmatal formation and function.

Keywords

Endoplasmic Reticulum Tobacco Mosaic Virus Sieve Element Tobacco Mosaic Virus Movement Protein Phloem Protein 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  1. 1.Scottish Crop Research InstituteDundeeUK

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