Development of Protoplast-Based Gene Editing System for Areca Palm

Area of Science:

• Plant Biotechnology
• Molecular Biology
• Crop Science

Background:

• Areca palm (Areca catechu L.) is a crucial economic crop in tropical and subtropical areas.
• Existing genetic improvement methods are hindered by the lack of efficient transformation and gene editing systems.

Purpose of the Study:

• To establish an efficient transformation and gene editing system for areca palm using protoplasts.
• To enable gene function verification and genetic improvement in areca palm.

Main Methods:

• Isolation of high-yield, viable protoplasts from juvenile areca palm leaves.
• Polyethylene glycol (PEG)-mediated transformation of protoplasts using the CRISPR/Cas9 system targeting the AcPDS gene.
• Subcellular localization studies using GFP and pNLS-mCherry cotransformation.
• Assessment of gene editing efficiency via Hi-TOM sequencing.

Main Results:

• Successfully isolated protoplasts with high yield (9.08 × 10^6 cells/g FW) and viability (91.57%).
• Achieved a transformation efficiency of 11.85% using optimized PEG-mediated conditions.
• Detected a gene editing efficiency of 2.82% for the AcPDS gene.
• Established subcellular localization of targeted proteins.

Conclusions:

• An efficient protoplast-based transformation and CRISPR/Cas9 gene editing system has been successfully established for areca palm.
• This system provides a valuable tool for gene function studies and genetic enhancement of areca palm.
• The methodology holds potential for application in other tropical palm crops.