Measuring Plasmodesmata-mediated Intercellular Trafficking Using Microparticle Bombardment in Arabidopsis and Crops.

Area of Science:

• Plant Biology
• Cell Biology
• Molecular Biology

Background:

• Plasmodesmata (PD) are crucial nano-pores connecting adjacent plant cells, facilitating intercellular communication.
• PD ensures the continuity of the plasma membrane, endoplasmic reticulum (ER), and cytosol, with the ER forming the desmotubule.
• Intercellular trafficking of various molecules, including proteins and RNA, occurs via PD, but quantifying this movement is challenging.

Purpose of the Study:

• To present a refined microparticle bombardment method for investigating PD-mediated movement of fluorescent proteins.
• To enhance the efficiency and consistency of biolistic particle delivery for PD research.
• To demonstrate the method's applicability across different plant species and experimental conditions.

Main Methods:

• Utilized a biolistic particle delivery system equipped with a flow guiding barrel for microparticle bombardment.
• Investigated the movement of fluorescent proteins through plasmodesmata in plant cells.
• Assessed the impact of gold particle aggregation and plant age on transformation efficiency and protein trafficking.

Main Results:

• The microparticle bombardment method demonstrated improved efficiency and consistency in delivering particles.
• Successfully quantified PD-mediated movement of fluorescent proteins in Arabidopsis.
• Validated the method's feasibility for studying PD trafficking in tomato, pepper, and soybean.

Conclusions:

• The developed microparticle bombardment technique offers a robust and efficient approach for studying plasmodesmata-mediated molecular trafficking.
• The method is adaptable and effective for a range of plant species, advancing research in plant cell-to-cell communication.
• This protocol provides a valuable tool for researchers investigating the dynamics of molecular transport through plasmodesmata.