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Author Spotlight: Microscopic Analysis of Protein Localization at Plasmodesmata in Plants
Published on: November 1, 2024
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PDLP5, a plasmodesmata permeability regulator, can traffic between plant cells
1Department of Biochemistry and Cell Biology, State University of New York, Stony Brook, NY USA.
NPJ Science of Plants
|July 9, 2025
Summary
Plasmodesmata proteins like PDLP5 can move between plant cells, a process essential for intercellular communication. This cell-to-cell movement of PDLP5 involves its transmembrane domain, offering new insights into its function.
Area of Science:
- Plant cell biology
- Molecular plant pathology
Background:
- Plasmodesmata (PD) are crucial for plant intercellular communication, regulating the transport of molecules and pathogens.
- PD-located proteins (PDLPs) and PD callose binding proteins (PDCBs) are key regulators of PD pore size.
- The cell-to-cell mobility of PDLP proteins themselves is largely unknown.
Purpose of the Study:
- To investigate the cell-to-cell movement capacity of PDLP proteins.
- To determine if the transmembrane domain of PDLP5 is involved in its intercellular trafficking.
Main Methods:
- Expression of PDLP1, PDLP2, and PDLP5 in *Nicotiana benthamiana*.
- Confocal microscopy to visualize protein localization and movement.
- Analysis of PDLP5 movement dependent on its native transmembrane domain.
Main Results:
- PDLP5 demonstrated efficient cell-to-cell movement in *Nicotiana benthamiana*.
- PDLP1 and PDLP2 did not exhibit significant cell-to-cell movement.
- The native transmembrane domain of PDLP5 was found to be essential for its cell-to-cell trafficking.
Conclusions:
- PDLP5 possesses the ability to traffic between plant cells, unlike PDLP1 and PDLP2.
- The transmembrane domain of PDLP5 plays a critical role in its intercellular movement.
- These findings enhance understanding of PDLP5's complex role in plasmodesmata function and transport.
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