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Permeabilizing soybean protoplasts to macromolecules using electroporation and hypotonic shock
1Plant Biotechnology Institute, National Research Council, Saskatoon, Saskatchewan, S7N 0W9, Canada.
Plant Physiology
|January 1, 1987
Summary
Electroporation effectively permeabilizes soybean protoplasts, with optimal results achieved using two pulses. This method significantly enhances fluid uptake compared to hypotonic shock, crucial for cell research.
Area of Science:
- Plant Biotechnology
- Cell Biology
- Molecular Biology
Background:
- Soybean protoplasts are key for genetic engineering and plant regeneration.
- Efficient methods for protoplast permeabilization are essential for introducing molecules into plant cells.
Purpose of the Study:
- To determine the optimal electroporation parameters for soybean protoplast permeabilization.
- To quantify fluid uptake by electroporated protoplasts.
- To compare electroporation with hypotonic shock for fluid uptake efficiency.
Main Methods:
- Soybean cell culture protoplasts were subjected to varying electroporation voltages and pulse numbers.
- Permeabilization was assessed using the fluorescent dye calcein.
- Fluid uptake was quantified using radioactive inulin.
- Electroporation was compared to hypotonic shock treatment.
Main Results:
- Optimal permeabilization (78% of surviving protoplasts) was achieved with two 50 ms, 400 V/cm pulses.
- Electroporation resulted in 20-40 nL of fluid uptake per 10^6 protoplasts.
- Electroporation yielded approximately 10 times greater fluid uptake than hypotonic shock.
Conclusions:
- Electroporation is a highly effective method for permeabilizing soybean protoplasts.
- Optimized electroporation significantly enhances cellular fluid uptake compared to hypotonic shock.
- A direct relationship exists between protoplast lysis, fluid uptake, and permeabilization efficiency.