A simple improved-throughput xylem protoplast system for studying wood formation.

Area of Science:

• Plant Molecular Biology
• Wood Biology
• Biotechnology

Background:

• Isolated protoplasts are valuable for transient expression systems, mirroring stable transgenic responses.
• They facilitate studies on gene transactivation and nucleocytoplasmic protein trafficking.
• Protoplasts are crucial when stable transgenics or mutants are unavailable for systems biology.

Purpose of the Study:

• To establish an efficient protocol for isolating and transfecting protoplasts from stem-differentiating xylem (SDX) of Populus trichocarpa.
• To provide a rapid and high-yield method for protoplast isolation and DNA transfection in woody plants.

Main Methods:

• The protocol involves tissue preparation, cell wall digestion, protoplast isolation, and DNA transfection.
• It is optimized for speed and yield, processing small to large-scale SDX samples.
• Simultaneous processing of up to ten samples is feasible within a short timeframe.

Main Results:

• The protocol achieves high yields of protoplasts (approximately 2.5 × 10^7 per g of SDX).
• Isolated protoplasts exhibit high transcriptome identity (96%) with intact SDX.
• The entire process, from sample preparation to transfection, is significantly faster than previous methods.

Conclusions:

• This optimized protocol offers a rapid, high-yield, and reproducible method for protoplast isolation and transfection in Populus trichocarpa.
• It provides a powerful tool for transient gene expression studies and systems biology in woody plants.
• The method's efficiency and high transcriptome fidelity make it suitable for diverse research applications in plant science.