Quantifying the Organization and Dynamics of the Plant Plasma Membrane Across Scales Using Light Microscopy

Area of Science:

• Plant cell biology
• Molecular plant science

Background:

• The plant cell surface involves the cell wall, plasma membrane, and cytoskeleton.
• Plasmodesmata are crucial for intercellular communication and resource transport.
• Understanding protein dynamics in these structures is key to plant development and environmental response.

Purpose of the Study:

• To describe protocols for quantifying plasma membrane and plasmodesmata protein dynamics and organization.
• To provide researchers with methods for analyzing protein behavior at the cell surface.

Main Methods:

• Fluorescence Recovery After Photobleaching (FRAP) for bulk protein mobility.
• Airyscan confocal microscopy for nanodomain size quantification.
• Total Internal Reflection Fluorescence (TIRF) single-particle imaging for nanodomain dynamics.

Main Results:

• Protocols enable quantification of bulk protein mobility.
• Methods allow for imaging and quantification of nanodomain size.
• Single-particle imaging reveals nanodomain dynamics.

Conclusions:

• The described protocols offer comprehensive tools for studying plant cell surface protein dynamics.
• These methods are vital for advancing our understanding of plant development and stimulus perception.