Electrically induced protoplast fusion using pulse electric fields for dielectrophoresis

Area of Science:

• Plant biotechnology
• Cell biology
• Electroporation

Background:

• Protoplast fusion is crucial for plant genetic engineering.
• Electric field-induced fusion requires optimization of field parameters and medium composition.

Purpose of the Study:

• To investigate protoplast chain formation and fusion in pea mesophyll protoplasts using different electric field types.
• To compare the efficacy of sine-wave and alternating pulse fields in inducing protoplast aggregation and fusion.

Main Methods:

• Isolation of pea (Pisum sativum cv Ran 1) mesophyll protoplasts.
• Application of sine-wave (2 V, 500-0.1 kHz) and alternating pulse fields (1 V, 0.1-0.4 kHz).
• Observation and quantification of dielectrophoretic pairing, chain formation, and fusion at varying CaCl(2) concentrations.

Main Results:

• Alternating pulse fields significantly increased dielectrophoretic pairing of protoplasts.
• Protoplast chains formed in the presence of CaCl(2) up to 5 mm under pulse field conditions.
• Protoplast fusion was observed at 3 mm CaCl(2) with the pulse field, a concentration where sine-wave fields were less effective.

Conclusions:

• Alternating pulse fields offer a more efficient method for inducing protoplast aggregation and fusion in pea.
• Electrically induced protoplast fusion is feasible at lower cation concentrations using pulse fields, expanding potential applications.