Intercellular trafficking via plasmodesmata: molecular layers of complexity

作者：Ziqiang Patrick Li, Andrea Paterlini, Marie Glavier, Emmanuelle Bayer · 发表于：Cellular and Molecular Life Sciences · 年份：2020 · DOI：10.1007/s00018-020-03622-8 · 被引用次数：76 · 研究领域：Legume Nitrogen Fixing Symbiosis、Plant nutrient uptake and metabolism、Plant Molecular Biology Research

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.