A simple method is described for the electrofusion of plant protoplasts. Protoplasts were aggregated in a radio-frequency field (10 V RMS, 0.5 MHz) for 15–30 s with an inter-electrode distance of J mm. They were then fused with a 300-V DC pulse. The protoplasts were able to divide after this treatment. A trans-ferrable electrode permitted electrofusion of l-ml volumes of culture in standard tissue-culture dishes in about 20 s.

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