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Related Experiment Video

Updated: Dec 29, 2025

Author Spotlight: Image-Based Methods to Study Membrane Trafficking Events in Stomatal Lineage Cells

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Lipid-Modulated Trafficking in Plants.

Pradeep Kachroo¹, Aardra Kachroo¹

¹Department of Plant Pathology, University of Kentucky, Lexington, KY 40546, USA.

Molecular Plant

|February 1, 2020

Summary

This summary is machine-generated.

A specific sphingolipid, t18:0 phytoshinganine, binds to plasmodesmata (PD) proteins, increasing their retention at PD. This interaction is linked to reduced PD permeability, offering new insights into plant cell communication.

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Published on: September 28, 2013

Area of Science:

Plant cell biology
Membrane biophysics
Molecular plant science

Background:

Plasmodesmata (PD) are crucial for intercellular communication in plants.
Recent research identified detergent-insoluble membrane microdomains at PD, rich in sterols and sphingolipids.
The precise roles of specific lipids and proteins in PD regulation remain under investigation.

Purpose of the Study:

To investigate the interaction between specific sphingolipids and PD-localized proteins.
To determine the effect of this interaction on PD protein retention and function.
To elucidate the role of t18:0 phytoshinganine in regulating PD permeability.

Main Methods:

Biochemical assays to study lipid-protein binding.
Localization studies to assess protein retention at PD.
Measurements of PD permeability.

Main Results:

The sphingolipid t18:0 phytoshinganine was found to bind to PD-localized protein 5 (PDLP5).
This binding event enhances the retention of PDLP5 at plasmodesmata.
Increased PDLP5 retention is associated with a reduction in PD permeability.

Conclusions:

Sphingolipids play a direct role in regulating plasmodesmata function through protein interactions.
The interaction between t18:0 phytoshinganine and PDLP5 provides a novel mechanism for controlling PD permeability.
This finding contributes to understanding the complex molecular machinery governing intercellular transport in plants.