Abstract
Transient expression of chimaeric genes (neomycin phosphotransferase fused to four different promoters) was detected in suspension culture derived protoplasts of maize, barley and rice, in mesophyll protoplasts of maize, rice, rye, and root protoplasts of maize. The introduction and expression of foreign genes could be performed with both dividing and non-dividing protoplasts by applying the PEG transformation method. The significance of this method for the functional analysis of genes was demonstrated by the differential expression of a regulated gene in protoplasts of different tissues in agreement with its expression in the donor tissue.
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