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The bacterial chloramphenicol acetyltransferase (CAT) gene was expressed in protoplasts of three important graminaceous plant species after introduction of the gene by electroporation. Gene transfer occurred when high-voltage electric pulses were applied either directly or indirectly (without anode contact) to a solution containing plasmid DNA and protoplasts of rice, wheat, or sorghum. The indirect method was more rapid, resulted in higher protoplast viability, and was less subject to contamination than the direct-contact method. Gene expression of approximately equal magnitude resulted when the CAT gene was fused to either the 35S promoter of cauliflower mosaic virus or the copia long terminal repeat promoter of Drosophila. Together with recent advances in regeneration of callus and whole plants from protoplasts, this system makes it possible to study inheritance and expression of genes introduced into graminaceous monocotyledonous plants.

proceedings of the national academy of sciences of the united states of america

Expression of a foreign gene linked to either a plant-virus or a <i>Drosophila</i> promoter, after electroporation of protoplasts of rice, wheat, and sorghum

Expression of a foreign gene linked to either a plant-virus or a Drosophila promoter, after electroporation of protoplasts of rice, wheat, and sorghum