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Intercellular trafficking via plasmodesmata: molecular layers of complexity

Published version
Peer-reviewed

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Abstract

Abstract: Plasmodesmata are intercellular pores connecting together most plant cells. These structures consist of a central constricted form of the endoplasmic reticulum, encircled by some cytoplasmic space, in turn delimited by the plasma membrane, itself ultimately surrounded by the cell wall. The presence and structure of plasmodesmata create multiple routes for intercellular trafficking of a large spectrum of molecules (encompassing RNAs, proteins, hormones and metabolites) and also enable local signalling events. Movement across plasmodesmata is finely controlled in order to balance processes requiring communication with those necessitating symplastic isolation. Here, we describe the identities and roles of the molecular components (specific sets of lipids, proteins and wall polysaccharides) that shape and define plasmodesmata structural and functional domains. We highlight the extensive and dynamic interactions that exist between the plasma/endoplasmic reticulum membranes, cytoplasm and cell wall domains, binding them together to effectively define plasmodesmata shapes and purposes.

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Keywords

Review, Plants, Cell–cell communication, Plasmodesmata, ER–PM contacts, Nanodomains, Cell wall

Journal Title

Cellular and Molecular Life Sciences

Conference Name

Journal ISSN

1420-682X
1420-9071

Volume Title

78

Publisher

Springer International Publishing
Sponsorship
European Research Council () (772103-BRIDGING)
Gatsby Charitable Foundation (GAT3395/PR3)
Agence Nationale de la Recherche (ANR-18-CE13-0016 STAYING-TIGHT)