Transformation of colonial Escherichia coli on solid media |
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Authors: | Maeda Sumio Sawamura Akiko Matsuda Akiko |
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Institution: | Food Safety Laboratory, Faculty of Human Life and Environment, Nara Women's University, Kitauoyanishi-machi, 630-8506, Japan. smaeda@cc.nara-wu.ac.jp |
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Abstract: | We report that colonial Escherichia coli cells on various solid media can develop modest genetic competence. Using an on-filter culture system, we found that E. coli colonies on CaCl2-containing agar were transformed in the presence of plasmid DNA. Interestingly, transformation also occurred on LB-agar, various moist foods and even on H2O-agar. These results suggest that some populations of colonial E. coli in various environments could become transformable regardless of the surrounding Ca2+ concentration. |
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Keywords: | Escherichia coli Transformation Colony Biofilm |
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