Organogenesis in Camellia x williamsii: cytokinin requirement and susceptibility to antibiotics |
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Authors: | A. Tosca R. Pandolfi S. Vasconi |
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Affiliation: | (1) Fondazione Minoprio, Viale Raimondi, 54, 22070 Vertemate con Minoprio (Como), Italy |
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Abstract: | Summary The genetic transformation of plants calls for efficient organogenetic methods. Both cytokinins and antibiotics were tested to evaluate shoot regeneration from internodes of in vitro plants of Camellia x williamsii cv Debbie. High regeneration rates were achieved by using thidiazuron, which turned out to be more effective than 6-benzylaminopurine. Up to 96% of explants regenerated when thidiazuron was used, whereas no more than 75% regenerated using 6-benzylaminopurine. The best average number of shoots per regenerant explant was 9.7 and 5.6 regarding respectively thidiazuron and 6-benzylaminopurine. Kanamycin, used in combination with the best performing thidiazuron concentration, completely blocked regeneration at 129 M. Cefotaxime at 524 M decreased the regeneration ability, especially when 2 day preculture was applied. The application of genetic transformation protocols as well as the main aims of genetic engineering in ornamental camellias are discussed.Abbreviations MS Murashige & Skoog - WPM Woody Plant Medium - BA 6-benzylaminopurine - TDZ thidiazuron - IBA indole butyric acid - NPTII neomycin phosphotransferase II - CaMV Cauliflower Mosaic Virus |
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