Summary
Maize (Zea mays, cv ‘Black Mexican Sweet’) (BMS) and tobacco (Nicotiana tabacum, cv ‘Xanthi’) tissue cultures were transformed using silicon carbide fibers to deliver DNA into suspension culture cells. DNA delivery was mediated by vortexing cells in the presence of silicon carbide fibers and plasmid DNA. Maize cells were treated with a plasmid carrying both the BAR gene, whose product confers resistance to the herbicide BASTA, and a gene encoding β-glucuronidase (GUS). Tobacco cells were treated with two plasmids to co-transfer genes encoding neomycin phosphotransferase (NPTII) and GUS from the respective plasmids. Thirty-four BASTA-resistant BMS colonies and 23 kanamycin-resistant tobacco colonies recovered following selection contained intact copies of the BAR gene and NPTII genes, respectively, as determined by Southern blot analysis. Sixty-five percent of the resistant BMS colonies and 50% of the resistant tobacco colonies also expressed GUS activity. Intact copies of the GUS gene were observed in Southern blots of all resistant BMS and tobacco colonies that expressed GUS activity. These results indicate that a simple, inexpensive DNA delivery procedure employing silicon carbide fibers can be used to reproducibly transform cells of both monocotyledonous and dicotyledonous plant species.
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Communicated by F. Salamini
Cooperative investigation of the Minnesota Agriculture Experiment Station and the US Department of Agriculture, Agricultural Research Service. Supported in part by grants from The Quaker Oats Company, and Midwest Plant Biotechnology Consortium, USDA Subgrant # 593-0009-04. Minnesota Agricultural Experiment Station Publication No. 19,226.
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Kaeppler, H.F., Somers, D.A., Rines, H.W. et al. Silicon carbide fiber-mediated stable transformation of plant cells. Theoret. Appl. Genetics 84, 560–566 (1992). https://doi.org/10.1007/BF00224152
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DOI: https://doi.org/10.1007/BF00224152