Summary
A method (termed co-cultivation) for transforming plant cells in vitro with A. tumefaciens strains, which was originally developed by Marton et al. (1978) Nature 277: 129–131, has been modified by the incorporation of a novel feeder plate culture system and been extended to use with petunia protoplasts. Using efficient cell plating and selection conditions for phytohormone-independent growth, large numbers of independent transformed calli can be obtained efficiently (∼10-1) and in less than 3 weeks following protoplast isolation. Southern hybridization analysis has confirmed that the majority of the resulting in vitro transformants contain a single copy of full length T-DNA.
The high efficiency of this procedure allows simple screening to identify plant cells transformed by Ti plasmids attenuated by deletion of internal T-DNA regions. Results are presented that demonstrate the co-cultivation method can be used in conjunction with short term assays for monitoring plant gene expression.
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Fraley, R.T., Horsch, R.B., Matzke, A. et al. In vitro transformation of petunia cells by an improved method of co-cultivation with A. tumefaciens strains. Plant Mol Biol 3, 371–378 (1984). https://doi.org/10.1007/BF00033384
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DOI: https://doi.org/10.1007/BF00033384