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Plasmodesmata

Plasmodesmata

The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.Intercellular junctions are a feature of fungal, plant, and animal cells alike. However, different types of junctions are found in different kinds of cells. Intercellular junctions found in animal...

Plasmodesmata

Plasmodesmata

In a multicellular organism, cells must communicate to work together in a coordinated manner. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
Intercellular junctions are a feature of fungal, plant, and animal cells. However, different types of junctions are found in different kinds of cells. Intercellular junctions found in animal cells include tight junctions, gap junctions, and...

Cell Adhesion in Plants

Cell Adhesion in Plants

Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose, and...

Contact-dependent Signaling

Contact-dependent Signaling

Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...

Desmosomes

Desmosomes

The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions are essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein complexes comprising desmosomal...

Overview of Cell-Cell Junctions

Overview of Cell-Cell Junctions

The complex three-dimensional arrangement of cells in any multicellular organism is defined and maintained by interactions of cells with each other and the extracellular matrix. Cell-cell junctions are specialized structures where the multi-protein complexes on one cell interact with the multi-protein complexes on another cell. These cell junctions are classified into three main types based on their function — occluding, anchoring, and gap junctions.
Occluding or Tight Junctions
Tight...

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Related Experiment Video

Updated: Jun 8, 2026

Confocal Microscopy Analysis of Protein Sorting to Plasmodesmata in Nicotiana benthamiana

Confocal Microscopy Analysis of Protein Sorting to Plasmodesmata in Nicotiana benthamiana

Published on: November 1, 2024

Plasmodesmata viewed as specialised membrane adhesion sites.

Jens Tilsner¹, Khalid Amari, Lesley Torrance

¹Institute of Molecular Plant Sciences, University of Edinburgh, Mayfield Road, Edinburgh, EH9 3JH, UK. J.Tilsner@ed.ac.uk

|October 13, 2010

Summary

Lipid membranes are crucial for understanding plasmodesmata (PD) structure and protein targeting. Exploring protein-lipid interactions offers new insights into these unique cellular connections.

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Confocal Microscopy Analysis of Protein Sorting to Plasmodesmata in Nicotiana benthamiana

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Area of Science:

Plant Cell Biology
Membrane Biology

Background:

Plasmodesmata (PD) are channels connecting plant cells, but their components and protein targeting mechanisms remain incompletely understood.
Identifying the precise molecular makeup of PD is essential for deciphering their function in cell-to-cell communication.

Purpose of the Study:

To review the potential structural and targeting roles of lipid membranes in plasmodesmata.
To explore how membrane properties influence PD organization and protein localization.

Main Methods:

Literature review focusing on plasmodesmata research.
Comparative analysis with studies on membrane domains and organelle shape generation.
Synthesis of findings on protein-lipid interactions in cell biology.

Main Results:

Lipid membranes likely play a significant role in defining the structural architecture of plasmodesmata.
Membrane domains may act as specific targeting signals for proteins destined for plasmodesmata.
Principles from other membrane-bound organelles may inform our understanding of PD.

Conclusions:

Considering protein-lipid interactions is vital for advancing our knowledge of plasmodesmata components.
Further research into the interplay between lipids and proteins will illuminate the function of these unique plant cell structures.